./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe005_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe005_tso.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/safe005_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe005_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:49:34,771 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:49:34,820 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:49:34,823 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:49:34,824 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:49:34,840 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:49:34,840 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:49:34,841 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:49:34,841 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:49:34,841 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:49:34,842 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:49:34,842 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:49:34,843 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:49:34,846 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:49:34,846 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:49:34,846 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:49:34,847 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:49:34,847 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:49:34,847 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:49:34,848 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:49:34,848 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:49:34,848 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:49:34,848 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:49:34,849 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:49:34,849 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:49:34,849 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:49:34,849 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:49:34,849 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:49:34,850 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:49:34,850 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:49:34,851 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:49:34,851 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:49:34,851 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:49:34,851 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:49:34,852 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:49:34,852 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:49:34,852 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:49:34,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:49:34,853 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:49:34,853 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:49:34,853 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:49:34,853 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:49:34,853 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:49:34,853 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:49:35,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:49:35,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:49:35,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:49:35,073 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:49:35,074 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:49:35,074 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe005_tso.yml/witness.yml [2024-06-27 17:49:35,176 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:49:35,177 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:49:35,178 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe005_tso.i [2024-06-27 17:49:36,130 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:49:36,386 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:49:36,413 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe005_tso.i [2024-06-27 17:49:36,433 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c47266839/eaa0f75a47364b6589a259469c9baa86/FLAGb732aefd9 [2024-06-27 17:49:36,443 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c47266839/eaa0f75a47364b6589a259469c9baa86 [2024-06-27 17:49:36,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:49:36,445 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:49:36,446 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:49:36,446 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:49:36,459 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:49:36,459 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:49:35" (1/2) ... [2024-06-27 17:49:36,460 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3390c907 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:36, skipping insertion in model container [2024-06-27 17:49:36,460 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:49:35" (1/2) ... [2024-06-27 17:49:36,461 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7d71ba20 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:36, skipping insertion in model container [2024-06-27 17:49:36,462 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:49:36" (2/2) ... [2024-06-27 17:49:36,462 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3390c907 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:36, skipping insertion in model container [2024-06-27 17:49:36,463 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:49:36" (2/2) ... [2024-06-27 17:49:36,463 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:49:36,495 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:49:36,496 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-27 17:49:36,496 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-27 17:49:36,497 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-27 17:49:36,497 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:49:36,497 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-27 17:49:36,536 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:49:36,702 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe005_tso.i[945,958] [2024-06-27 17:49:36,805 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:49:36,824 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:49:36,854 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe005_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:49:36,946 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:49:36,986 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:49:36,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:36 WrapperNode [2024-06-27 17:49:36,987 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:49:36,988 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:49:36,988 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:49:36,988 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:49:36,993 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:36" (1/1) ... [2024-06-27 17:49:37,020 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:36" (1/1) ... [2024-06-27 17:49:37,046 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2024-06-27 17:49:37,046 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:49:37,047 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:49:37,047 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:49:37,047 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:49:37,055 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:36" (1/1) ... [2024-06-27 17:49:37,056 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:36" (1/1) ... [2024-06-27 17:49:37,061 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:36" (1/1) ... [2024-06-27 17:49:37,083 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 17:49:37,083 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:36" (1/1) ... [2024-06-27 17:49:37,083 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:36" (1/1) ... [2024-06-27 17:49:37,095 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:36" (1/1) ... [2024-06-27 17:49:37,096 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:36" (1/1) ... [2024-06-27 17:49:37,100 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:36" (1/1) ... [2024-06-27 17:49:37,101 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:36" (1/1) ... [2024-06-27 17:49:37,106 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:49:37,108 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:49:37,109 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:49:37,109 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:49:37,110 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:36" (1/1) ... [2024-06-27 17:49:37,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:49:37,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:49:37,135 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) [2024-06-27 17:49:37,155 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 [2024-06-27 17:49:37,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:49:37,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:49:37,168 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:49:37,169 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:49:37,169 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:49:37,169 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:49:37,169 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 17:49:37,169 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 17:49:37,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:49:37,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:49:37,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:49:37,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:49:37,172 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:49:37,294 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:49:37,297 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:49:37,452 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:49:37,452 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:49:37,525 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:49:37,539 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:49:37,540 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:49:37 BoogieIcfgContainer [2024-06-27 17:49:37,540 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:49:37,541 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:49:37,541 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:49:37,544 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:49:37,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:49:35" (1/4) ... [2024-06-27 17:49:37,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0cf68e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:49:37, skipping insertion in model container [2024-06-27 17:49:37,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:49:36" (2/4) ... [2024-06-27 17:49:37,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0cf68e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:49:37, skipping insertion in model container [2024-06-27 17:49:37,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:36" (3/4) ... [2024-06-27 17:49:37,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0cf68e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:49:37, skipping insertion in model container [2024-06-27 17:49:37,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:49:37" (4/4) ... [2024-06-27 17:49:37,547 INFO L112 eAbstractionObserver]: Analyzing ICFG safe005_tso.i [2024-06-27 17:49:37,560 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:49:37,560 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 17:49:37,560 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:49:37,598 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:49:37,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-06-27 17:49:37,656 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-06-27 17:49:37,660 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:49:37,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 43 events. 1/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-06-27 17:49:37,664 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-06-27 17:49:37,668 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 40 transitions, 89 flow [2024-06-27 17:49:37,683 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:49:37,690 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;@6b94ba17, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:49:37,690 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 17:49:37,698 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:49:37,698 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:49:37,698 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:49:37,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:37,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:49:37,717 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:37,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:37,721 INFO L85 PathProgramCache]: Analyzing trace with hash 209466946, now seen corresponding path program 1 times [2024-06-27 17:49:37,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:37,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034628697] [2024-06-27 17:49:37,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:37,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:38,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:38,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034628697] [2024-06-27 17:49:38,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034628697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:38,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:38,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:49:38,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484653759] [2024-06-27 17:49:38,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:38,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:49:38,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:38,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:49:38,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:49:38,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2024-06-27 17:49:38,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:38,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:38,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2024-06-27 17:49:38,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:38,312 INFO L124 PetriNetUnfolderBase]: 736/1198 cut-off events. [2024-06-27 17:49:38,312 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 17:49:38,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2383 conditions, 1198 events. 736/1198 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6189 event pairs, 397 based on Foata normal form. 1/1145 useless extension candidates. Maximal degree in co-relation 2371. Up to 1120 conditions per place. [2024-06-27 17:49:38,325 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 31 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-06-27 17:49:38,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 189 flow [2024-06-27 17:49:38,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:49:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:49:38,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-06-27 17:49:38,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7318840579710145 [2024-06-27 17:49:38,336 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 89 flow. Second operand 3 states and 101 transitions. [2024-06-27 17:49:38,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 189 flow [2024-06-27 17:49:38,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:38,345 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 116 flow [2024-06-27 17:49:38,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 17:49:38,350 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-06-27 17:49:38,350 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 116 flow [2024-06-27 17:49:38,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:38,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:38,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:38,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:49:38,351 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:38,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:38,352 INFO L85 PathProgramCache]: Analyzing trace with hash -564969073, now seen corresponding path program 1 times [2024-06-27 17:49:38,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:38,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674783837] [2024-06-27 17:49:38,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:38,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:38,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:38,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674783837] [2024-06-27 17:49:38,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674783837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:38,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:38,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:49:38,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759511375] [2024-06-27 17:49:38,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:38,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:49:38,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:38,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:49:38,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:49:38,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:49:38,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 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) [2024-06-27 17:49:38,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:38,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:49:38,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:38,677 INFO L124 PetriNetUnfolderBase]: 1194/1928 cut-off events. [2024-06-27 17:49:38,677 INFO L125 PetriNetUnfolderBase]: For 365/403 co-relation queries the response was YES. [2024-06-27 17:49:38,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4272 conditions, 1928 events. 1194/1928 cut-off events. For 365/403 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10852 event pairs, 625 based on Foata normal form. 3/1896 useless extension candidates. Maximal degree in co-relation 4260. Up to 1754 conditions per place. [2024-06-27 17:49:38,691 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 45 selfloop transitions, 7 changer transitions 0/67 dead transitions. [2024-06-27 17:49:38,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 67 transitions, 284 flow [2024-06-27 17:49:38,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:49:38,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:49:38,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-27 17:49:38,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2024-06-27 17:49:38,697 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 116 flow. Second operand 4 states and 128 transitions. [2024-06-27 17:49:38,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 67 transitions, 284 flow [2024-06-27 17:49:38,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:38,700 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 168 flow [2024-06-27 17:49:38,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-27 17:49:38,701 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2024-06-27 17:49:38,701 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 168 flow [2024-06-27 17:49:38,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 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) [2024-06-27 17:49:38,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:38,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:38,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:49:38,705 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:38,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:38,709 INFO L85 PathProgramCache]: Analyzing trace with hash 88934826, now seen corresponding path program 1 times [2024-06-27 17:49:38,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:38,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235627452] [2024-06-27 17:49:38,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:38,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:38,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:38,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235627452] [2024-06-27 17:49:38,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235627452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:38,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:38,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:49:38,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445858670] [2024-06-27 17:49:38,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:38,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:49:38,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:38,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:49:38,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:49:38,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 17:49:38,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:38,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:38,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 17:49:38,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:39,001 INFO L124 PetriNetUnfolderBase]: 982/1617 cut-off events. [2024-06-27 17:49:39,002 INFO L125 PetriNetUnfolderBase]: For 794/922 co-relation queries the response was YES. [2024-06-27 17:49:39,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4001 conditions, 1617 events. 982/1617 cut-off events. For 794/922 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9234 event pairs, 466 based on Foata normal form. 2/1540 useless extension candidates. Maximal degree in co-relation 3986. Up to 1460 conditions per place. [2024-06-27 17:49:39,012 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 40 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2024-06-27 17:49:39,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 67 transitions, 312 flow [2024-06-27 17:49:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:49:39,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:49:39,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-27 17:49:39,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6902173913043478 [2024-06-27 17:49:39,016 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 168 flow. Second operand 4 states and 127 transitions. [2024-06-27 17:49:39,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 67 transitions, 312 flow [2024-06-27 17:49:39,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 310 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 17:49:39,020 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 209 flow [2024-06-27 17:49:39,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=209, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2024-06-27 17:49:39,021 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2024-06-27 17:49:39,021 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 209 flow [2024-06-27 17:49:39,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:39,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:39,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:39,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:49:39,022 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:39,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:39,023 INFO L85 PathProgramCache]: Analyzing trace with hash 544407007, now seen corresponding path program 1 times [2024-06-27 17:49:39,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:39,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462116754] [2024-06-27 17:49:39,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:39,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:39,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:39,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462116754] [2024-06-27 17:49:39,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462116754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:39,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:39,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:39,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2691187] [2024-06-27 17:49:39,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:39,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:39,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:39,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:39,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:39,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:39,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 209 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:39,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:39,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:39,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:39,465 INFO L124 PetriNetUnfolderBase]: 1508/2398 cut-off events. [2024-06-27 17:49:39,465 INFO L125 PetriNetUnfolderBase]: For 1919/1919 co-relation queries the response was YES. [2024-06-27 17:49:39,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6410 conditions, 2398 events. 1508/2398 cut-off events. For 1919/1919 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13424 event pairs, 406 based on Foata normal form. 6/2401 useless extension candidates. Maximal degree in co-relation 6392. Up to 2147 conditions per place. [2024-06-27 17:49:39,480 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 64 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2024-06-27 17:49:39,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 459 flow [2024-06-27 17:49:39,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:39,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:39,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 17:49:39,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557971014492754 [2024-06-27 17:49:39,483 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 209 flow. Second operand 6 states and 181 transitions. [2024-06-27 17:49:39,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 459 flow [2024-06-27 17:49:39,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 90 transitions, 442 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:39,488 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 249 flow [2024-06-27 17:49:39,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=249, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-27 17:49:39,489 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2024-06-27 17:49:39,489 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 249 flow [2024-06-27 17:49:39,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:39,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:39,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:39,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:49:39,490 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:39,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:39,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1537986945, now seen corresponding path program 1 times [2024-06-27 17:49:39,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:39,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775798883] [2024-06-27 17:49:39,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:39,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:39,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:39,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775798883] [2024-06-27 17:49:39,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775798883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:39,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:39,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:39,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15245079] [2024-06-27 17:49:39,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:39,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:39,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:39,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:39,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:39,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:39,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:39,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:39,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:39,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:39,806 INFO L124 PetriNetUnfolderBase]: 1523/2446 cut-off events. [2024-06-27 17:49:39,806 INFO L125 PetriNetUnfolderBase]: For 2926/2926 co-relation queries the response was YES. [2024-06-27 17:49:39,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7001 conditions, 2446 events. 1523/2446 cut-off events. For 2926/2926 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13775 event pairs, 458 based on Foata normal form. 4/2445 useless extension candidates. Maximal degree in co-relation 6981. Up to 2148 conditions per place. [2024-06-27 17:49:39,821 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 60 selfloop transitions, 15 changer transitions 0/89 dead transitions. [2024-06-27 17:49:39,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 89 transitions, 511 flow [2024-06-27 17:49:39,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:39,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:39,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-27 17:49:39,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6652173913043479 [2024-06-27 17:49:39,823 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 249 flow. Second operand 5 states and 153 transitions. [2024-06-27 17:49:39,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 89 transitions, 511 flow [2024-06-27 17:49:39,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 89 transitions, 486 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:39,832 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 322 flow [2024-06-27 17:49:39,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=322, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2024-06-27 17:49:39,834 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 15 predicate places. [2024-06-27 17:49:39,835 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 322 flow [2024-06-27 17:49:39,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:39,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:39,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:39,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:49:39,836 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:39,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:39,836 INFO L85 PathProgramCache]: Analyzing trace with hash 939954313, now seen corresponding path program 1 times [2024-06-27 17:49:39,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:39,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076917364] [2024-06-27 17:49:39,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:39,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:39,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:39,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076917364] [2024-06-27 17:49:39,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076917364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:39,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:39,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:39,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741676693] [2024-06-27 17:49:39,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:39,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:39,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:39,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:39,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:39,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:39,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 322 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:39,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:39,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:39,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:40,136 INFO L124 PetriNetUnfolderBase]: 1540/2487 cut-off events. [2024-06-27 17:49:40,136 INFO L125 PetriNetUnfolderBase]: For 4438/4438 co-relation queries the response was YES. [2024-06-27 17:49:40,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7935 conditions, 2487 events. 1540/2487 cut-off events. For 4438/4438 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14099 event pairs, 483 based on Foata normal form. 2/2479 useless extension candidates. Maximal degree in co-relation 7913. Up to 2159 conditions per place. [2024-06-27 17:49:40,152 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 63 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2024-06-27 17:49:40,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 96 transitions, 605 flow [2024-06-27 17:49:40,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:40,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:40,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-27 17:49:40,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6826086956521739 [2024-06-27 17:49:40,153 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 322 flow. Second operand 5 states and 157 transitions. [2024-06-27 17:49:40,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 96 transitions, 605 flow [2024-06-27 17:49:40,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 96 transitions, 573 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:40,161 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 386 flow [2024-06-27 17:49:40,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=386, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-27 17:49:40,162 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2024-06-27 17:49:40,162 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 386 flow [2024-06-27 17:49:40,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:40,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:40,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:40,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:49:40,163 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:40,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:40,163 INFO L85 PathProgramCache]: Analyzing trace with hash -408832481, now seen corresponding path program 2 times [2024-06-27 17:49:40,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:40,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890600696] [2024-06-27 17:49:40,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:40,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:40,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:40,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890600696] [2024-06-27 17:49:40,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890600696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:40,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:40,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:40,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652294901] [2024-06-27 17:49:40,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:40,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:40,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:40,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:40,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:40,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:40,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 386 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:40,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:40,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:40,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:40,472 INFO L124 PetriNetUnfolderBase]: 1527/2518 cut-off events. [2024-06-27 17:49:40,472 INFO L125 PetriNetUnfolderBase]: For 4935/4935 co-relation queries the response was YES. [2024-06-27 17:49:40,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8023 conditions, 2518 events. 1527/2518 cut-off events. For 4935/4935 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 14537 event pairs, 508 based on Foata normal form. 4/2515 useless extension candidates. Maximal degree in co-relation 7999. Up to 2146 conditions per place. [2024-06-27 17:49:40,491 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 59 selfloop transitions, 18 changer transitions 0/91 dead transitions. [2024-06-27 17:49:40,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 91 transitions, 590 flow [2024-06-27 17:49:40,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:40,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:40,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-27 17:49:40,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6565217391304348 [2024-06-27 17:49:40,493 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 386 flow. Second operand 5 states and 151 transitions. [2024-06-27 17:49:40,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 91 transitions, 590 flow [2024-06-27 17:49:40,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 91 transitions, 567 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:40,500 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 409 flow [2024-06-27 17:49:40,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=409, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2024-06-27 17:49:40,502 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 23 predicate places. [2024-06-27 17:49:40,502 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 409 flow [2024-06-27 17:49:40,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:40,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:40,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:40,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:49:40,503 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:40,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:40,503 INFO L85 PathProgramCache]: Analyzing trace with hash -536679458, now seen corresponding path program 1 times [2024-06-27 17:49:40,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:40,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659706175] [2024-06-27 17:49:40,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:40,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:40,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:40,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659706175] [2024-06-27 17:49:40,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659706175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:40,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:40,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:40,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392731400] [2024-06-27 17:49:40,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:40,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:40,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:40,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:40,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:40,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:40,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 409 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:40,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:40,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:40,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:40,881 INFO L124 PetriNetUnfolderBase]: 1546/2609 cut-off events. [2024-06-27 17:49:40,881 INFO L125 PetriNetUnfolderBase]: For 6120/6120 co-relation queries the response was YES. [2024-06-27 17:49:40,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8310 conditions, 2609 events. 1546/2609 cut-off events. For 6120/6120 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15492 event pairs, 642 based on Foata normal form. 8/2589 useless extension candidates. Maximal degree in co-relation 8284. Up to 2123 conditions per place. [2024-06-27 17:49:40,899 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 65 selfloop transitions, 22 changer transitions 0/101 dead transitions. [2024-06-27 17:49:40,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 101 transitions, 669 flow [2024-06-27 17:49:40,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:40,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:40,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:49:40,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-06-27 17:49:40,900 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 409 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:49:40,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 101 transitions, 669 flow [2024-06-27 17:49:40,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 101 transitions, 640 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:40,907 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 458 flow [2024-06-27 17:49:40,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=458, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2024-06-27 17:49:40,909 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 26 predicate places. [2024-06-27 17:49:40,909 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 458 flow [2024-06-27 17:49:40,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:40,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:40,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:40,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:49:40,910 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:40,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:40,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1352801930, now seen corresponding path program 1 times [2024-06-27 17:49:40,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:40,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373223081] [2024-06-27 17:49:40,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:40,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:41,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:41,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:41,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373223081] [2024-06-27 17:49:41,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373223081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:41,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:41,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:41,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532393548] [2024-06-27 17:49:41,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:41,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:41,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:41,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:41,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:41,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:41,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 458 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:41,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:41,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:41,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:41,309 INFO L124 PetriNetUnfolderBase]: 1563/2644 cut-off events. [2024-06-27 17:49:41,309 INFO L125 PetriNetUnfolderBase]: For 7372/7372 co-relation queries the response was YES. [2024-06-27 17:49:41,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8907 conditions, 2644 events. 1563/2644 cut-off events. For 7372/7372 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15241 event pairs, 528 based on Foata normal form. 2/2642 useless extension candidates. Maximal degree in co-relation 8880. Up to 2252 conditions per place. [2024-06-27 17:49:41,322 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 82 selfloop transitions, 13 changer transitions 0/109 dead transitions. [2024-06-27 17:49:41,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 109 transitions, 748 flow [2024-06-27 17:49:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:41,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:41,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 17:49:41,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:49:41,326 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 458 flow. Second operand 6 states and 180 transitions. [2024-06-27 17:49:41,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 109 transitions, 748 flow [2024-06-27 17:49:41,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 109 transitions, 694 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:41,335 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 464 flow [2024-06-27 17:49:41,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=464, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2024-06-27 17:49:41,335 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 28 predicate places. [2024-06-27 17:49:41,336 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 464 flow [2024-06-27 17:49:41,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:41,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:41,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:41,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:49:41,336 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:41,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:41,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1954759516, now seen corresponding path program 2 times [2024-06-27 17:49:41,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:41,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544208474] [2024-06-27 17:49:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:41,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:41,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:41,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544208474] [2024-06-27 17:49:41,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544208474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:41,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:41,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:41,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537179365] [2024-06-27 17:49:41,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:41,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:41,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:41,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:41,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:41,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:41,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 464 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:41,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:41,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:41,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:41,645 INFO L124 PetriNetUnfolderBase]: 1602/2616 cut-off events. [2024-06-27 17:49:41,645 INFO L125 PetriNetUnfolderBase]: For 9106/9106 co-relation queries the response was YES. [2024-06-27 17:49:41,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9343 conditions, 2616 events. 1602/2616 cut-off events. For 9106/9106 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15047 event pairs, 474 based on Foata normal form. 2/2601 useless extension candidates. Maximal degree in co-relation 9315. Up to 2141 conditions per place. [2024-06-27 17:49:41,656 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 74 selfloop transitions, 32 changer transitions 0/120 dead transitions. [2024-06-27 17:49:41,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 120 transitions, 906 flow [2024-06-27 17:49:41,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:41,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:41,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-27 17:49:41,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6847826086956522 [2024-06-27 17:49:41,658 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 464 flow. Second operand 6 states and 189 transitions. [2024-06-27 17:49:41,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 120 transitions, 906 flow [2024-06-27 17:49:41,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 120 transitions, 870 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:41,667 INFO L231 Difference]: Finished difference. Result has 80 places, 86 transitions, 586 flow [2024-06-27 17:49:41,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=586, PETRI_PLACES=80, PETRI_TRANSITIONS=86} [2024-06-27 17:49:41,667 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 30 predicate places. [2024-06-27 17:49:41,668 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 86 transitions, 586 flow [2024-06-27 17:49:41,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:41,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:41,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:41,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:49:41,668 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:41,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:41,669 INFO L85 PathProgramCache]: Analyzing trace with hash -2045973378, now seen corresponding path program 3 times [2024-06-27 17:49:41,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:41,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741542966] [2024-06-27 17:49:41,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:41,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:41,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:41,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741542966] [2024-06-27 17:49:41,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741542966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:41,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:41,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:41,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571198005] [2024-06-27 17:49:41,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:41,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:41,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:41,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:41,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:41,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:41,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 86 transitions, 586 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:41,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:41,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:41,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:42,006 INFO L124 PetriNetUnfolderBase]: 1592/2684 cut-off events. [2024-06-27 17:49:42,007 INFO L125 PetriNetUnfolderBase]: For 11484/11484 co-relation queries the response was YES. [2024-06-27 17:49:42,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9990 conditions, 2684 events. 1592/2684 cut-off events. For 11484/11484 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16053 event pairs, 646 based on Foata normal form. 4/2660 useless extension candidates. Maximal degree in co-relation 9961. Up to 2133 conditions per place. [2024-06-27 17:49:42,019 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 72 selfloop transitions, 29 changer transitions 0/115 dead transitions. [2024-06-27 17:49:42,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 115 transitions, 896 flow [2024-06-27 17:49:42,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:42,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:42,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 17:49:42,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-06-27 17:49:42,021 INFO L175 Difference]: Start difference. First operand has 80 places, 86 transitions, 586 flow. Second operand 6 states and 183 transitions. [2024-06-27 17:49:42,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 115 transitions, 896 flow [2024-06-27 17:49:42,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 115 transitions, 854 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:42,034 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 611 flow [2024-06-27 17:49:42,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=611, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2024-06-27 17:49:42,034 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2024-06-27 17:49:42,035 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 611 flow [2024-06-27 17:49:42,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:42,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:42,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:42,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:49:42,035 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:42,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:42,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1132803315, now seen corresponding path program 1 times [2024-06-27 17:49:42,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:42,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212135438] [2024-06-27 17:49:42,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:42,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:42,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:42,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212135438] [2024-06-27 17:49:42,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212135438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:42,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:42,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:42,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412910030] [2024-06-27 17:49:42,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:42,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:42,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:42,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:42,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:42,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:42,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 611 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:42,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:42,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:42,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:42,389 INFO L124 PetriNetUnfolderBase]: 1609/2593 cut-off events. [2024-06-27 17:49:42,390 INFO L125 PetriNetUnfolderBase]: For 12421/12421 co-relation queries the response was YES. [2024-06-27 17:49:42,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10186 conditions, 2593 events. 1609/2593 cut-off events. For 12421/12421 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14775 event pairs, 431 based on Foata normal form. 2/2588 useless extension candidates. Maximal degree in co-relation 10154. Up to 2219 conditions per place. [2024-06-27 17:49:42,405 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 69 selfloop transitions, 27 changer transitions 0/110 dead transitions. [2024-06-27 17:49:42,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 110 transitions, 887 flow [2024-06-27 17:49:42,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:42,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:42,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-27 17:49:42,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2024-06-27 17:49:42,406 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 611 flow. Second operand 5 states and 154 transitions. [2024-06-27 17:49:42,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 110 transitions, 887 flow [2024-06-27 17:49:42,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 110 transitions, 812 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:42,421 INFO L231 Difference]: Finished difference. Result has 85 places, 89 transitions, 645 flow [2024-06-27 17:49:42,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=645, PETRI_PLACES=85, PETRI_TRANSITIONS=89} [2024-06-27 17:49:42,422 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2024-06-27 17:49:42,422 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 89 transitions, 645 flow [2024-06-27 17:49:42,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:42,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:42,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:42,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:49:42,423 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:42,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:42,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1862999765, now seen corresponding path program 2 times [2024-06-27 17:49:42,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:42,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201370203] [2024-06-27 17:49:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:42,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:42,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:42,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201370203] [2024-06-27 17:49:42,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201370203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:42,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:42,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:42,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456653246] [2024-06-27 17:49:42,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:42,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:42,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:42,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:42,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:42,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:42,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 89 transitions, 645 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:42,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:42,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:42,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:42,784 INFO L124 PetriNetUnfolderBase]: 1626/2744 cut-off events. [2024-06-27 17:49:42,784 INFO L125 PetriNetUnfolderBase]: For 14355/14355 co-relation queries the response was YES. [2024-06-27 17:49:42,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10522 conditions, 2744 events. 1626/2744 cut-off events. For 14355/14355 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16468 event pairs, 649 based on Foata normal form. 2/2720 useless extension candidates. Maximal degree in co-relation 10490. Up to 2169 conditions per place. [2024-06-27 17:49:42,801 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 69 selfloop transitions, 38 changer transitions 0/121 dead transitions. [2024-06-27 17:49:42,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 121 transitions, 1010 flow [2024-06-27 17:49:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:42,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:42,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 17:49:42,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-06-27 17:49:42,802 INFO L175 Difference]: Start difference. First operand has 85 places, 89 transitions, 645 flow. Second operand 6 states and 183 transitions. [2024-06-27 17:49:42,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 121 transitions, 1010 flow [2024-06-27 17:49:42,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 121 transitions, 957 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:42,820 INFO L231 Difference]: Finished difference. Result has 88 places, 92 transitions, 711 flow [2024-06-27 17:49:42,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=711, PETRI_PLACES=88, PETRI_TRANSITIONS=92} [2024-06-27 17:49:42,820 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 38 predicate places. [2024-06-27 17:49:42,821 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 92 transitions, 711 flow [2024-06-27 17:49:42,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:42,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:42,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:42,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:49:42,821 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:42,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:42,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1007305855, now seen corresponding path program 3 times [2024-06-27 17:49:42,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:42,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644127120] [2024-06-27 17:49:42,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:42,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:42,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:42,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644127120] [2024-06-27 17:49:42,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644127120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:42,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:42,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:42,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397574094] [2024-06-27 17:49:42,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:42,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:42,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:42,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:42,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:42,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:42,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 92 transitions, 711 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:42,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:42,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:42,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:43,150 INFO L124 PetriNetUnfolderBase]: 1621/2725 cut-off events. [2024-06-27 17:49:43,150 INFO L125 PetriNetUnfolderBase]: For 15732/15732 co-relation queries the response was YES. [2024-06-27 17:49:43,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10662 conditions, 2725 events. 1621/2725 cut-off events. For 15732/15732 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 16266 event pairs, 639 based on Foata normal form. 2/2703 useless extension candidates. Maximal degree in co-relation 10629. Up to 2164 conditions per place. [2024-06-27 17:49:43,167 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 70 selfloop transitions, 35 changer transitions 0/119 dead transitions. [2024-06-27 17:49:43,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 119 transitions, 985 flow [2024-06-27 17:49:43,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:43,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:43,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 17:49:43,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:49:43,169 INFO L175 Difference]: Start difference. First operand has 88 places, 92 transitions, 711 flow. Second operand 6 states and 180 transitions. [2024-06-27 17:49:43,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 119 transitions, 985 flow [2024-06-27 17:49:43,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 119 transitions, 853 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:43,187 INFO L231 Difference]: Finished difference. Result has 89 places, 92 transitions, 658 flow [2024-06-27 17:49:43,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=658, PETRI_PLACES=89, PETRI_TRANSITIONS=92} [2024-06-27 17:49:43,187 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 39 predicate places. [2024-06-27 17:49:43,187 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 92 transitions, 658 flow [2024-06-27 17:49:43,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:43,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:43,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:43,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:49:43,188 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:43,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:43,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2015887534, now seen corresponding path program 1 times [2024-06-27 17:49:43,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:43,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480933501] [2024-06-27 17:49:43,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:43,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:43,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:43,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480933501] [2024-06-27 17:49:43,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480933501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:43,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:43,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:43,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139524207] [2024-06-27 17:49:43,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:43,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:43,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:43,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:43,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:43,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:49:43,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 92 transitions, 658 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 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) [2024-06-27 17:49:43,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:43,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:49:43,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:43,512 INFO L124 PetriNetUnfolderBase]: 1521/2601 cut-off events. [2024-06-27 17:49:43,512 INFO L125 PetriNetUnfolderBase]: For 16392/16398 co-relation queries the response was YES. [2024-06-27 17:49:43,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10223 conditions, 2601 events. 1521/2601 cut-off events. For 16392/16398 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15696 event pairs, 649 based on Foata normal form. 8/2588 useless extension candidates. Maximal degree in co-relation 10190. Up to 2148 conditions per place. [2024-06-27 17:49:43,527 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 86 selfloop transitions, 17 changer transitions 0/123 dead transitions. [2024-06-27 17:49:43,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 123 transitions, 996 flow [2024-06-27 17:49:43,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:43,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:43,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-27 17:49:43,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6652173913043479 [2024-06-27 17:49:43,529 INFO L175 Difference]: Start difference. First operand has 89 places, 92 transitions, 658 flow. Second operand 5 states and 153 transitions. [2024-06-27 17:49:43,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 123 transitions, 996 flow [2024-06-27 17:49:43,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 123 transitions, 905 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:43,546 INFO L231 Difference]: Finished difference. Result has 90 places, 101 transitions, 676 flow [2024-06-27 17:49:43,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=676, PETRI_PLACES=90, PETRI_TRANSITIONS=101} [2024-06-27 17:49:43,548 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 40 predicate places. [2024-06-27 17:49:43,548 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 101 transitions, 676 flow [2024-06-27 17:49:43,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 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) [2024-06-27 17:49:43,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:43,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:43,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:49:43,548 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:43,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:43,549 INFO L85 PathProgramCache]: Analyzing trace with hash -611742545, now seen corresponding path program 1 times [2024-06-27 17:49:43,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:43,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415495433] [2024-06-27 17:49:43,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:43,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:43,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:43,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415495433] [2024-06-27 17:49:43,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415495433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:43,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:43,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:43,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396835611] [2024-06-27 17:49:43,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:43,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:43,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:43,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:43,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:43,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:43,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 101 transitions, 676 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:43,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:43,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:43,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:43,887 INFO L124 PetriNetUnfolderBase]: 1670/2791 cut-off events. [2024-06-27 17:49:43,887 INFO L125 PetriNetUnfolderBase]: For 18702/18702 co-relation queries the response was YES. [2024-06-27 17:49:43,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11220 conditions, 2791 events. 1670/2791 cut-off events. For 18702/18702 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16597 event pairs, 662 based on Foata normal form. 4/2770 useless extension candidates. Maximal degree in co-relation 11185. Up to 2326 conditions per place. [2024-06-27 17:49:43,904 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 97 selfloop transitions, 20 changer transitions 0/131 dead transitions. [2024-06-27 17:49:43,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 131 transitions, 994 flow [2024-06-27 17:49:43,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:43,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:43,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 17:49:43,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-06-27 17:49:43,906 INFO L175 Difference]: Start difference. First operand has 90 places, 101 transitions, 676 flow. Second operand 6 states and 178 transitions. [2024-06-27 17:49:43,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 131 transitions, 994 flow [2024-06-27 17:49:43,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 131 transitions, 978 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-27 17:49:43,926 INFO L231 Difference]: Finished difference. Result has 96 places, 103 transitions, 729 flow [2024-06-27 17:49:43,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=729, PETRI_PLACES=96, PETRI_TRANSITIONS=103} [2024-06-27 17:49:43,927 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 46 predicate places. [2024-06-27 17:49:43,928 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 103 transitions, 729 flow [2024-06-27 17:49:43,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:43,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:43,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:43,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:49:43,928 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:43,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:43,929 INFO L85 PathProgramCache]: Analyzing trace with hash -362123105, now seen corresponding path program 2 times [2024-06-27 17:49:43,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:43,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850379885] [2024-06-27 17:49:43,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:43,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:44,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:44,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850379885] [2024-06-27 17:49:44,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850379885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:44,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:44,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:44,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008436509] [2024-06-27 17:49:44,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:44,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:44,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:44,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:44,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:44,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:44,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 103 transitions, 729 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:44,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:44,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:44,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:44,251 INFO L124 PetriNetUnfolderBase]: 1662/2757 cut-off events. [2024-06-27 17:49:44,251 INFO L125 PetriNetUnfolderBase]: For 20766/20766 co-relation queries the response was YES. [2024-06-27 17:49:44,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11519 conditions, 2757 events. 1662/2757 cut-off events. For 20766/20766 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 16227 event pairs, 412 based on Foata normal form. 4/2752 useless extension candidates. Maximal degree in co-relation 11481. Up to 2229 conditions per place. [2024-06-27 17:49:44,269 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 98 selfloop transitions, 22 changer transitions 0/134 dead transitions. [2024-06-27 17:49:44,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 134 transitions, 1059 flow [2024-06-27 17:49:44,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:44,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 17:49:44,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-06-27 17:49:44,270 INFO L175 Difference]: Start difference. First operand has 96 places, 103 transitions, 729 flow. Second operand 6 states and 178 transitions. [2024-06-27 17:49:44,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 134 transitions, 1059 flow [2024-06-27 17:49:44,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 134 transitions, 1008 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:44,290 INFO L231 Difference]: Finished difference. Result has 98 places, 105 transitions, 755 flow [2024-06-27 17:49:44,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=755, PETRI_PLACES=98, PETRI_TRANSITIONS=105} [2024-06-27 17:49:44,291 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 48 predicate places. [2024-06-27 17:49:44,291 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 105 transitions, 755 flow [2024-06-27 17:49:44,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:44,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:44,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:44,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:49:44,292 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:44,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:44,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1331169292, now seen corresponding path program 2 times [2024-06-27 17:49:44,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:44,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828789193] [2024-06-27 17:49:44,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:44,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:44,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:44,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:44,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828789193] [2024-06-27 17:49:44,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828789193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:44,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:44,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:44,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366161760] [2024-06-27 17:49:44,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:44,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:44,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:44,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:44,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:44,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:49:44,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 105 transitions, 755 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 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) [2024-06-27 17:49:44,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:44,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:49:44,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:44,633 INFO L124 PetriNetUnfolderBase]: 1548/2639 cut-off events. [2024-06-27 17:49:44,633 INFO L125 PetriNetUnfolderBase]: For 21829/21829 co-relation queries the response was YES. [2024-06-27 17:49:44,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11131 conditions, 2639 events. 1548/2639 cut-off events. For 21829/21829 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15874 event pairs, 516 based on Foata normal form. 4/2639 useless extension candidates. Maximal degree in co-relation 11092. Up to 2177 conditions per place. [2024-06-27 17:49:44,650 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 85 selfloop transitions, 19 changer transitions 0/126 dead transitions. [2024-06-27 17:49:44,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 126 transitions, 1033 flow [2024-06-27 17:49:44,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:49:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:49:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-27 17:49:44,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7010869565217391 [2024-06-27 17:49:44,651 INFO L175 Difference]: Start difference. First operand has 98 places, 105 transitions, 755 flow. Second operand 4 states and 129 transitions. [2024-06-27 17:49:44,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 126 transitions, 1033 flow [2024-06-27 17:49:44,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 126 transitions, 968 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:44,675 INFO L231 Difference]: Finished difference. Result has 98 places, 108 transitions, 776 flow [2024-06-27 17:49:44,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=776, PETRI_PLACES=98, PETRI_TRANSITIONS=108} [2024-06-27 17:49:44,675 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 48 predicate places. [2024-06-27 17:49:44,676 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 108 transitions, 776 flow [2024-06-27 17:49:44,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 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) [2024-06-27 17:49:44,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:44,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:44,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:49:44,676 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:44,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:44,676 INFO L85 PathProgramCache]: Analyzing trace with hash -937116193, now seen corresponding path program 1 times [2024-06-27 17:49:44,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:44,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860233219] [2024-06-27 17:49:44,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:44,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:44,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:44,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860233219] [2024-06-27 17:49:44,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860233219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:44,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:44,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:44,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219362860] [2024-06-27 17:49:44,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:44,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:44,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:44,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:44,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:44,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:44,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 108 transitions, 776 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:44,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:44,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:44,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:45,170 INFO L124 PetriNetUnfolderBase]: 1740/2916 cut-off events. [2024-06-27 17:49:45,170 INFO L125 PetriNetUnfolderBase]: For 26079/26079 co-relation queries the response was YES. [2024-06-27 17:49:45,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12734 conditions, 2916 events. 1740/2916 cut-off events. For 26079/26079 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17385 event pairs, 480 based on Foata normal form. 4/2892 useless extension candidates. Maximal degree in co-relation 12694. Up to 2406 conditions per place. [2024-06-27 17:49:45,186 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 128 selfloop transitions, 19 changer transitions 0/161 dead transitions. [2024-06-27 17:49:45,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 161 transitions, 1306 flow [2024-06-27 17:49:45,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:45,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:45,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 17:49:45,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440217391304348 [2024-06-27 17:49:45,188 INFO L175 Difference]: Start difference. First operand has 98 places, 108 transitions, 776 flow. Second operand 8 states and 237 transitions. [2024-06-27 17:49:45,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 161 transitions, 1306 flow [2024-06-27 17:49:45,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 161 transitions, 1272 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:45,218 INFO L231 Difference]: Finished difference. Result has 104 places, 112 transitions, 843 flow [2024-06-27 17:49:45,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=843, PETRI_PLACES=104, PETRI_TRANSITIONS=112} [2024-06-27 17:49:45,218 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 54 predicate places. [2024-06-27 17:49:45,219 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 112 transitions, 843 flow [2024-06-27 17:49:45,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:45,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:45,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:45,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:49:45,219 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:45,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:45,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1342275131, now seen corresponding path program 2 times [2024-06-27 17:49:45,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:45,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601396673] [2024-06-27 17:49:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:45,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:45,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:45,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601396673] [2024-06-27 17:49:45,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601396673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:45,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:45,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:45,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356344963] [2024-06-27 17:49:45,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:45,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:45,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:45,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:45,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:45,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:45,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 843 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:45,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:45,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:45,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:45,673 INFO L124 PetriNetUnfolderBase]: 1732/2888 cut-off events. [2024-06-27 17:49:45,673 INFO L125 PetriNetUnfolderBase]: For 28159/28159 co-relation queries the response was YES. [2024-06-27 17:49:45,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12911 conditions, 2888 events. 1732/2888 cut-off events. For 28159/28159 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17232 event pairs, 630 based on Foata normal form. 4/2869 useless extension candidates. Maximal degree in co-relation 12870. Up to 2471 conditions per place. [2024-06-27 17:49:45,690 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 123 selfloop transitions, 15 changer transitions 0/152 dead transitions. [2024-06-27 17:49:45,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 152 transitions, 1215 flow [2024-06-27 17:49:45,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:45,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-27 17:49:45,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 17:49:45,693 INFO L175 Difference]: Start difference. First operand has 104 places, 112 transitions, 843 flow. Second operand 7 states and 207 transitions. [2024-06-27 17:49:45,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 152 transitions, 1215 flow [2024-06-27 17:49:45,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 152 transitions, 1157 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:45,726 INFO L231 Difference]: Finished difference. Result has 107 places, 112 transitions, 822 flow [2024-06-27 17:49:45,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=822, PETRI_PLACES=107, PETRI_TRANSITIONS=112} [2024-06-27 17:49:45,728 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 57 predicate places. [2024-06-27 17:49:45,728 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 112 transitions, 822 flow [2024-06-27 17:49:45,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:45,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:45,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:45,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:49:45,729 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:45,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:45,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1623205435, now seen corresponding path program 3 times [2024-06-27 17:49:45,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:45,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546384626] [2024-06-27 17:49:45,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:45,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:45,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:45,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546384626] [2024-06-27 17:49:45,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546384626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:45,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:45,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:45,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818641161] [2024-06-27 17:49:45,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:45,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:45,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:45,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:45,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:45,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:45,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 112 transitions, 822 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:45,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:45,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:45,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:46,101 INFO L124 PetriNetUnfolderBase]: 1759/2864 cut-off events. [2024-06-27 17:49:46,101 INFO L125 PetriNetUnfolderBase]: For 30614/30614 co-relation queries the response was YES. [2024-06-27 17:49:46,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13064 conditions, 2864 events. 1759/2864 cut-off events. For 30614/30614 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16642 event pairs, 406 based on Foata normal form. 4/2850 useless extension candidates. Maximal degree in co-relation 13021. Up to 2342 conditions per place. [2024-06-27 17:49:46,118 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 97 selfloop transitions, 40 changer transitions 0/151 dead transitions. [2024-06-27 17:49:46,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 151 transitions, 1214 flow [2024-06-27 17:49:46,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:46,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-27 17:49:46,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583850931677019 [2024-06-27 17:49:46,119 INFO L175 Difference]: Start difference. First operand has 107 places, 112 transitions, 822 flow. Second operand 7 states and 212 transitions. [2024-06-27 17:49:46,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 151 transitions, 1214 flow [2024-06-27 17:49:46,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 151 transitions, 1179 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 17:49:46,145 INFO L231 Difference]: Finished difference. Result has 108 places, 114 transitions, 908 flow [2024-06-27 17:49:46,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=908, PETRI_PLACES=108, PETRI_TRANSITIONS=114} [2024-06-27 17:49:46,145 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 58 predicate places. [2024-06-27 17:49:46,146 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 114 transitions, 908 flow [2024-06-27 17:49:46,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:46,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:46,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:46,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:49:46,146 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:46,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:46,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2067208577, now seen corresponding path program 1 times [2024-06-27 17:49:46,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:46,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294137148] [2024-06-27 17:49:46,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:46,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:46,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:46,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294137148] [2024-06-27 17:49:46,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294137148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:46,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:46,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:46,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310196521] [2024-06-27 17:49:46,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:46,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:46,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:46,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:46,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:46,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:49:46,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 114 transitions, 908 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:46,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:46,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:49:46,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:46,482 INFO L124 PetriNetUnfolderBase]: 1641/2749 cut-off events. [2024-06-27 17:49:46,483 INFO L125 PetriNetUnfolderBase]: For 32788/32797 co-relation queries the response was YES. [2024-06-27 17:49:46,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12900 conditions, 2749 events. 1641/2749 cut-off events. For 32788/32797 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16426 event pairs, 433 based on Foata normal form. 4/2745 useless extension candidates. Maximal degree in co-relation 12856. Up to 2278 conditions per place. [2024-06-27 17:49:46,500 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 96 selfloop transitions, 27 changer transitions 0/145 dead transitions. [2024-06-27 17:49:46,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 145 transitions, 1318 flow [2024-06-27 17:49:46,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:46,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:46,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 17:49:46,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:49:46,501 INFO L175 Difference]: Start difference. First operand has 108 places, 114 transitions, 908 flow. Second operand 6 states and 180 transitions. [2024-06-27 17:49:46,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 145 transitions, 1318 flow [2024-06-27 17:49:46,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 145 transitions, 1215 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:46,531 INFO L231 Difference]: Finished difference. Result has 109 places, 120 transitions, 935 flow [2024-06-27 17:49:46,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=935, PETRI_PLACES=109, PETRI_TRANSITIONS=120} [2024-06-27 17:49:46,532 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 59 predicate places. [2024-06-27 17:49:46,532 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 120 transitions, 935 flow [2024-06-27 17:49:46,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:46,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:46,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:46,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:49:46,532 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:46,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:46,533 INFO L85 PathProgramCache]: Analyzing trace with hash -2012474041, now seen corresponding path program 4 times [2024-06-27 17:49:46,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:46,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426615265] [2024-06-27 17:49:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:46,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:46,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:46,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426615265] [2024-06-27 17:49:46,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426615265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:46,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:46,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:46,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210934155] [2024-06-27 17:49:46,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:46,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:46,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:46,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:46,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:46,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:46,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 120 transitions, 935 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:46,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:46,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:46,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:46,897 INFO L124 PetriNetUnfolderBase]: 1867/3025 cut-off events. [2024-06-27 17:49:46,897 INFO L125 PetriNetUnfolderBase]: For 40726/40726 co-relation queries the response was YES. [2024-06-27 17:49:46,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14406 conditions, 3025 events. 1867/3025 cut-off events. For 40726/40726 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17875 event pairs, 403 based on Foata normal form. 20/3038 useless extension candidates. Maximal degree in co-relation 14361. Up to 2378 conditions per place. [2024-06-27 17:49:46,916 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 108 selfloop transitions, 37 changer transitions 0/159 dead transitions. [2024-06-27 17:49:46,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 159 transitions, 1361 flow [2024-06-27 17:49:46,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 17:49:46,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65527950310559 [2024-06-27 17:49:46,917 INFO L175 Difference]: Start difference. First operand has 109 places, 120 transitions, 935 flow. Second operand 7 states and 211 transitions. [2024-06-27 17:49:46,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 159 transitions, 1361 flow [2024-06-27 17:49:46,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 159 transitions, 1322 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:46,967 INFO L231 Difference]: Finished difference. Result has 114 places, 122 transitions, 1016 flow [2024-06-27 17:49:46,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1016, PETRI_PLACES=114, PETRI_TRANSITIONS=122} [2024-06-27 17:49:46,968 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 64 predicate places. [2024-06-27 17:49:46,968 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 122 transitions, 1016 flow [2024-06-27 17:49:46,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:46,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:46,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:46,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:49:46,968 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:46,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:46,969 INFO L85 PathProgramCache]: Analyzing trace with hash 28378983, now seen corresponding path program 2 times [2024-06-27 17:49:46,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:46,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576429899] [2024-06-27 17:49:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:46,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:47,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:47,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576429899] [2024-06-27 17:49:47,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576429899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:47,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:47,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:47,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45411327] [2024-06-27 17:49:47,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:47,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:47,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:47,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:47,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:47,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:49:47,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 122 transitions, 1016 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:47,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:47,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:49:47,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:47,303 INFO L124 PetriNetUnfolderBase]: 1721/2877 cut-off events. [2024-06-27 17:49:47,303 INFO L125 PetriNetUnfolderBase]: For 39158/39175 co-relation queries the response was YES. [2024-06-27 17:49:47,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14041 conditions, 2877 events. 1721/2877 cut-off events. For 39158/39175 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17410 event pairs, 386 based on Foata normal form. 19/2893 useless extension candidates. Maximal degree in co-relation 13994. Up to 2439 conditions per place. [2024-06-27 17:49:47,321 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 99 selfloop transitions, 22 changer transitions 0/143 dead transitions. [2024-06-27 17:49:47,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 143 transitions, 1308 flow [2024-06-27 17:49:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-27 17:49:47,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2024-06-27 17:49:47,323 INFO L175 Difference]: Start difference. First operand has 114 places, 122 transitions, 1016 flow. Second operand 5 states and 154 transitions. [2024-06-27 17:49:47,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 143 transitions, 1308 flow [2024-06-27 17:49:47,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 143 transitions, 1208 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:47,366 INFO L231 Difference]: Finished difference. Result has 114 places, 122 transitions, 966 flow [2024-06-27 17:49:47,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=966, PETRI_PLACES=114, PETRI_TRANSITIONS=122} [2024-06-27 17:49:47,366 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 64 predicate places. [2024-06-27 17:49:47,366 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 122 transitions, 966 flow [2024-06-27 17:49:47,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:47,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:47,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:47,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:49:47,367 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:47,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:47,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1860460029, now seen corresponding path program 1 times [2024-06-27 17:49:47,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:47,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811084457] [2024-06-27 17:49:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:47,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:47,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:47,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811084457] [2024-06-27 17:49:47,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811084457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:47,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:47,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:47,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607591337] [2024-06-27 17:49:47,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:47,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:47,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:47,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:47,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:47,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:47,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 122 transitions, 966 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:47,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:47,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:47,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:47,766 INFO L124 PetriNetUnfolderBase]: 1897/3195 cut-off events. [2024-06-27 17:49:47,766 INFO L125 PetriNetUnfolderBase]: For 41508/41508 co-relation queries the response was YES. [2024-06-27 17:49:47,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14799 conditions, 3195 events. 1897/3195 cut-off events. For 41508/41508 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19528 event pairs, 447 based on Foata normal form. 2/3189 useless extension candidates. Maximal degree in co-relation 14751. Up to 2590 conditions per place. [2024-06-27 17:49:47,782 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 119 selfloop transitions, 34 changer transitions 0/167 dead transitions. [2024-06-27 17:49:47,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 167 transitions, 1580 flow [2024-06-27 17:49:47,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 17:49:47,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:49:47,784 INFO L175 Difference]: Start difference. First operand has 114 places, 122 transitions, 966 flow. Second operand 6 states and 180 transitions. [2024-06-27 17:49:47,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 167 transitions, 1580 flow [2024-06-27 17:49:47,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 167 transitions, 1504 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:47,817 INFO L231 Difference]: Finished difference. Result has 118 places, 140 transitions, 1161 flow [2024-06-27 17:49:47,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1161, PETRI_PLACES=118, PETRI_TRANSITIONS=140} [2024-06-27 17:49:47,818 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 68 predicate places. [2024-06-27 17:49:47,818 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 140 transitions, 1161 flow [2024-06-27 17:49:47,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:47,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:47,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:47,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:49:47,818 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:47,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:47,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1146733747, now seen corresponding path program 2 times [2024-06-27 17:49:47,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:47,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111749721] [2024-06-27 17:49:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:47,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:47,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:47,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111749721] [2024-06-27 17:49:47,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111749721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:47,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:47,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:47,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152298589] [2024-06-27 17:49:47,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:47,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:47,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:47,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:47,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:47,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:47,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 140 transitions, 1161 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:47,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:47,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:47,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:48,215 INFO L124 PetriNetUnfolderBase]: 2023/3394 cut-off events. [2024-06-27 17:49:48,215 INFO L125 PetriNetUnfolderBase]: For 47802/47802 co-relation queries the response was YES. [2024-06-27 17:49:48,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16629 conditions, 3394 events. 2023/3394 cut-off events. For 47802/47802 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 20990 event pairs, 644 based on Foata normal form. 4/3377 useless extension candidates. Maximal degree in co-relation 16578. Up to 2849 conditions per place. [2024-06-27 17:49:48,236 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 138 selfloop transitions, 35 changer transitions 0/187 dead transitions. [2024-06-27 17:49:48,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 187 transitions, 1831 flow [2024-06-27 17:49:48,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-27 17:49:48,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-06-27 17:49:48,237 INFO L175 Difference]: Start difference. First operand has 118 places, 140 transitions, 1161 flow. Second operand 7 states and 201 transitions. [2024-06-27 17:49:48,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 187 transitions, 1831 flow [2024-06-27 17:49:48,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 187 transitions, 1779 flow, removed 26 selfloop flow, removed 0 redundant places. [2024-06-27 17:49:48,286 INFO L231 Difference]: Finished difference. Result has 126 places, 160 transitions, 1438 flow [2024-06-27 17:49:48,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1438, PETRI_PLACES=126, PETRI_TRANSITIONS=160} [2024-06-27 17:49:48,287 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 76 predicate places. [2024-06-27 17:49:48,287 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 160 transitions, 1438 flow [2024-06-27 17:49:48,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:48,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:48,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:48,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:49:48,287 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:48,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:48,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1496992451, now seen corresponding path program 3 times [2024-06-27 17:49:48,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:48,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331431584] [2024-06-27 17:49:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:48,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:48,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:48,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331431584] [2024-06-27 17:49:48,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331431584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:48,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:48,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:48,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870219261] [2024-06-27 17:49:48,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:48,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:48,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:48,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:48,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:48,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:48,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 160 transitions, 1438 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:48,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:48,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:48,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:48,725 INFO L124 PetriNetUnfolderBase]: 2113/3538 cut-off events. [2024-06-27 17:49:48,726 INFO L125 PetriNetUnfolderBase]: For 54538/54538 co-relation queries the response was YES. [2024-06-27 17:49:48,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18241 conditions, 3538 events. 2113/3538 cut-off events. For 54538/54538 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 21975 event pairs, 417 based on Foata normal form. 4/3534 useless extension candidates. Maximal degree in co-relation 18186. Up to 2797 conditions per place. [2024-06-27 17:49:48,748 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 133 selfloop transitions, 70 changer transitions 0/217 dead transitions. [2024-06-27 17:49:48,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 217 transitions, 2212 flow [2024-06-27 17:49:48,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:48,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-27 17:49:48,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6708074534161491 [2024-06-27 17:49:48,749 INFO L175 Difference]: Start difference. First operand has 126 places, 160 transitions, 1438 flow. Second operand 7 states and 216 transitions. [2024-06-27 17:49:48,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 217 transitions, 2212 flow [2024-06-27 17:49:48,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 217 transitions, 2117 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:48,816 INFO L231 Difference]: Finished difference. Result has 133 places, 179 transitions, 1813 flow [2024-06-27 17:49:48,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1813, PETRI_PLACES=133, PETRI_TRANSITIONS=179} [2024-06-27 17:49:48,817 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 83 predicate places. [2024-06-27 17:49:48,817 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 179 transitions, 1813 flow [2024-06-27 17:49:48,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:48,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:48,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:48,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:49:48,817 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:48,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:48,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1497238715, now seen corresponding path program 1 times [2024-06-27 17:49:48,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:48,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162079478] [2024-06-27 17:49:48,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:48,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:48,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:48,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162079478] [2024-06-27 17:49:48,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162079478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:48,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:48,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:48,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182745398] [2024-06-27 17:49:48,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:48,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:48,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:48,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:48,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:48,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:49:48,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 179 transitions, 1813 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:48,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:48,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:49:48,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:49,249 INFO L124 PetriNetUnfolderBase]: 2015/3351 cut-off events. [2024-06-27 17:49:49,250 INFO L125 PetriNetUnfolderBase]: For 57921/57921 co-relation queries the response was YES. [2024-06-27 17:49:49,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18641 conditions, 3351 events. 2015/3351 cut-off events. For 57921/57921 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20663 event pairs, 384 based on Foata normal form. 2/3346 useless extension candidates. Maximal degree in co-relation 18582. Up to 2749 conditions per place. [2024-06-27 17:49:49,277 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 148 selfloop transitions, 10 changer transitions 0/194 dead transitions. [2024-06-27 17:49:49,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 194 transitions, 2189 flow [2024-06-27 17:49:49,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:49:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:49:49,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-27 17:49:49,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.657608695652174 [2024-06-27 17:49:49,279 INFO L175 Difference]: Start difference. First operand has 133 places, 179 transitions, 1813 flow. Second operand 4 states and 121 transitions. [2024-06-27 17:49:49,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 194 transitions, 2189 flow [2024-06-27 17:49:49,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 194 transitions, 2096 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:49,360 INFO L231 Difference]: Finished difference. Result has 135 places, 181 transitions, 1779 flow [2024-06-27 17:49:49,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1779, PETRI_PLACES=135, PETRI_TRANSITIONS=181} [2024-06-27 17:49:49,361 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 85 predicate places. [2024-06-27 17:49:49,361 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 181 transitions, 1779 flow [2024-06-27 17:49:49,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:49,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:49,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:49,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:49:49,361 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:49,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:49,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1014169834, now seen corresponding path program 1 times [2024-06-27 17:49:49,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:49,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060145207] [2024-06-27 17:49:49,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:49,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:49,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:49,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:49,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060145207] [2024-06-27 17:49:49,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060145207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:49,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:49,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:49,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199112390] [2024-06-27 17:49:49,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:49,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:49,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:49,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:49,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:49,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:49,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 181 transitions, 1779 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:49,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:49,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:49,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:49,950 INFO L124 PetriNetUnfolderBase]: 2297/3843 cut-off events. [2024-06-27 17:49:49,951 INFO L125 PetriNetUnfolderBase]: For 68370/68370 co-relation queries the response was YES. [2024-06-27 17:49:49,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20804 conditions, 3843 events. 2297/3843 cut-off events. For 68370/68370 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24392 event pairs, 282 based on Foata normal form. 12/3845 useless extension candidates. Maximal degree in co-relation 20743. Up to 2751 conditions per place. [2024-06-27 17:49:49,979 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 177 selfloop transitions, 35 changer transitions 0/226 dead transitions. [2024-06-27 17:49:49,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 226 transitions, 2467 flow [2024-06-27 17:49:49,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:49,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:49,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-27 17:49:49,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6677018633540373 [2024-06-27 17:49:49,980 INFO L175 Difference]: Start difference. First operand has 135 places, 181 transitions, 1779 flow. Second operand 7 states and 215 transitions. [2024-06-27 17:49:49,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 226 transitions, 2467 flow [2024-06-27 17:49:50,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 226 transitions, 2426 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:50,056 INFO L231 Difference]: Finished difference. Result has 140 places, 183 transitions, 1860 flow [2024-06-27 17:49:50,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1738, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1860, PETRI_PLACES=140, PETRI_TRANSITIONS=183} [2024-06-27 17:49:50,056 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 90 predicate places. [2024-06-27 17:49:50,056 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 183 transitions, 1860 flow [2024-06-27 17:49:50,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:50,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:50,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:50,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:49:50,057 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:50,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:50,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1997240916, now seen corresponding path program 2 times [2024-06-27 17:49:50,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:50,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547297891] [2024-06-27 17:49:50,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:50,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:50,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:50,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:50,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547297891] [2024-06-27 17:49:50,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547297891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:50,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:50,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:50,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954088253] [2024-06-27 17:49:50,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:50,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:50,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:50,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:50,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:50,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:50,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 183 transitions, 1860 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:50,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:50,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:50,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:50,599 INFO L124 PetriNetUnfolderBase]: 2356/3961 cut-off events. [2024-06-27 17:49:50,600 INFO L125 PetriNetUnfolderBase]: For 73707/73707 co-relation queries the response was YES. [2024-06-27 17:49:50,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21592 conditions, 3961 events. 2356/3961 cut-off events. For 73707/73707 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 25317 event pairs, 439 based on Foata normal form. 16/3967 useless extension candidates. Maximal degree in co-relation 21530. Up to 3153 conditions per place. [2024-06-27 17:49:50,626 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 170 selfloop transitions, 31 changer transitions 0/215 dead transitions. [2024-06-27 17:49:50,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 215 transitions, 2378 flow [2024-06-27 17:49:50,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:50,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:50,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 17:49:50,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6702898550724637 [2024-06-27 17:49:50,627 INFO L175 Difference]: Start difference. First operand has 140 places, 183 transitions, 1860 flow. Second operand 6 states and 185 transitions. [2024-06-27 17:49:50,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 215 transitions, 2378 flow [2024-06-27 17:49:50,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 215 transitions, 2334 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:50,724 INFO L231 Difference]: Finished difference. Result has 143 places, 184 transitions, 1915 flow [2024-06-27 17:49:50,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1816, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1915, PETRI_PLACES=143, PETRI_TRANSITIONS=184} [2024-06-27 17:49:50,725 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 93 predicate places. [2024-06-27 17:49:50,725 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 184 transitions, 1915 flow [2024-06-27 17:49:50,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:50,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:50,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:50,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:49:50,725 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:50,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:50,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1141487486, now seen corresponding path program 3 times [2024-06-27 17:49:50,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:50,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158894936] [2024-06-27 17:49:50,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:50,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:50,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:50,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158894936] [2024-06-27 17:49:50,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158894936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:50,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:50,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:50,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23627048] [2024-06-27 17:49:50,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:50,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:50,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:50,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:50,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:50,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:50,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 184 transitions, 1915 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:50,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:50,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:50,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:51,223 INFO L124 PetriNetUnfolderBase]: 2336/3890 cut-off events. [2024-06-27 17:49:51,223 INFO L125 PetriNetUnfolderBase]: For 72613/72613 co-relation queries the response was YES. [2024-06-27 17:49:51,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21358 conditions, 3890 events. 2336/3890 cut-off events. For 72613/72613 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 24666 event pairs, 432 based on Foata normal form. 12/3890 useless extension candidates. Maximal degree in co-relation 21294. Up to 2937 conditions per place. [2024-06-27 17:49:51,251 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 172 selfloop transitions, 32 changer transitions 0/218 dead transitions. [2024-06-27 17:49:51,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 218 transitions, 2429 flow [2024-06-27 17:49:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:51,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 17:49:51,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6702898550724637 [2024-06-27 17:49:51,253 INFO L175 Difference]: Start difference. First operand has 143 places, 184 transitions, 1915 flow. Second operand 6 states and 185 transitions. [2024-06-27 17:49:51,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 218 transitions, 2429 flow [2024-06-27 17:49:51,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 218 transitions, 2358 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:51,355 INFO L231 Difference]: Finished difference. Result has 145 places, 184 transitions, 1914 flow [2024-06-27 17:49:51,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1844, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1914, PETRI_PLACES=145, PETRI_TRANSITIONS=184} [2024-06-27 17:49:51,355 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 95 predicate places. [2024-06-27 17:49:51,355 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 184 transitions, 1914 flow [2024-06-27 17:49:51,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:51,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:51,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:51,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:49:51,356 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:51,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:51,357 INFO L85 PathProgramCache]: Analyzing trace with hash 459305388, now seen corresponding path program 4 times [2024-06-27 17:49:51,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:51,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810839703] [2024-06-27 17:49:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:51,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:51,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:51,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810839703] [2024-06-27 17:49:51,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810839703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:51,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:51,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:51,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808963726] [2024-06-27 17:49:51,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:51,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:51,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:51,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:51,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:51,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:51,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 184 transitions, 1914 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:51,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:51,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:51,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:51,911 INFO L124 PetriNetUnfolderBase]: 2430/4114 cut-off events. [2024-06-27 17:49:51,911 INFO L125 PetriNetUnfolderBase]: For 78215/78215 co-relation queries the response was YES. [2024-06-27 17:49:51,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22208 conditions, 4114 events. 2430/4114 cut-off events. For 78215/78215 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 26755 event pairs, 774 based on Foata normal form. 16/4092 useless extension candidates. Maximal degree in co-relation 22143. Up to 3251 conditions per place. [2024-06-27 17:49:51,944 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 172 selfloop transitions, 36 changer transitions 0/222 dead transitions. [2024-06-27 17:49:51,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 222 transitions, 2460 flow [2024-06-27 17:49:51,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:51,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:51,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 17:49:51,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6490683229813664 [2024-06-27 17:49:51,945 INFO L175 Difference]: Start difference. First operand has 145 places, 184 transitions, 1914 flow. Second operand 7 states and 209 transitions. [2024-06-27 17:49:51,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 222 transitions, 2460 flow [2024-06-27 17:49:52,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 222 transitions, 2367 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:52,064 INFO L231 Difference]: Finished difference. Result has 147 places, 185 transitions, 1926 flow [2024-06-27 17:49:52,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1926, PETRI_PLACES=147, PETRI_TRANSITIONS=185} [2024-06-27 17:49:52,064 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 97 predicate places. [2024-06-27 17:49:52,064 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 185 transitions, 1926 flow [2024-06-27 17:49:52,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:52,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:52,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:52,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:49:52,065 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:52,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:52,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1453964354, now seen corresponding path program 5 times [2024-06-27 17:49:52,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:52,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943485976] [2024-06-27 17:49:52,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:52,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:52,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:52,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943485976] [2024-06-27 17:49:52,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943485976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:52,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:52,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:52,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39416968] [2024-06-27 17:49:52,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:52,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:52,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:52,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:52,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:52,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:52,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 185 transitions, 1926 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:52,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:52,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:52,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:52,660 INFO L124 PetriNetUnfolderBase]: 2524/4142 cut-off events. [2024-06-27 17:49:52,660 INFO L125 PetriNetUnfolderBase]: For 82792/82792 co-relation queries the response was YES. [2024-06-27 17:49:52,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22877 conditions, 4142 events. 2524/4142 cut-off events. For 82792/82792 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 26256 event pairs, 479 based on Foata normal form. 16/4151 useless extension candidates. Maximal degree in co-relation 22811. Up to 3401 conditions per place. [2024-06-27 17:49:52,685 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 170 selfloop transitions, 39 changer transitions 0/223 dead transitions. [2024-06-27 17:49:52,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 223 transitions, 2476 flow [2024-06-27 17:49:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-27 17:49:52,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:49:52,686 INFO L175 Difference]: Start difference. First operand has 147 places, 185 transitions, 1926 flow. Second operand 7 states and 210 transitions. [2024-06-27 17:49:52,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 223 transitions, 2476 flow [2024-06-27 17:49:52,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 223 transitions, 2391 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:52,795 INFO L231 Difference]: Finished difference. Result has 149 places, 186 transitions, 1954 flow [2024-06-27 17:49:52,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1841, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1954, PETRI_PLACES=149, PETRI_TRANSITIONS=186} [2024-06-27 17:49:52,795 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 99 predicate places. [2024-06-27 17:49:52,795 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 186 transitions, 1954 flow [2024-06-27 17:49:52,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:52,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:52,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:52,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:49:52,796 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:52,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:52,796 INFO L85 PathProgramCache]: Analyzing trace with hash 459157518, now seen corresponding path program 6 times [2024-06-27 17:49:52,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:52,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484470627] [2024-06-27 17:49:52,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:52,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:52,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:52,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484470627] [2024-06-27 17:49:52,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484470627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:52,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:52,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:52,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146465853] [2024-06-27 17:49:52,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:52,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:52,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:52,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:52,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:52,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:52,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 186 transitions, 1954 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:52,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:52,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:52,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:53,345 INFO L124 PetriNetUnfolderBase]: 2556/4198 cut-off events. [2024-06-27 17:49:53,345 INFO L125 PetriNetUnfolderBase]: For 83304/83304 co-relation queries the response was YES. [2024-06-27 17:49:53,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23008 conditions, 4198 events. 2556/4198 cut-off events. For 83304/83304 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 26717 event pairs, 470 based on Foata normal form. 12/4203 useless extension candidates. Maximal degree in co-relation 22941. Up to 3028 conditions per place. [2024-06-27 17:49:53,378 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 173 selfloop transitions, 40 changer transitions 0/227 dead transitions. [2024-06-27 17:49:53,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 227 transitions, 2528 flow [2024-06-27 17:49:53,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 17:49:53,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65527950310559 [2024-06-27 17:49:53,379 INFO L175 Difference]: Start difference. First operand has 149 places, 186 transitions, 1954 flow. Second operand 7 states and 211 transitions. [2024-06-27 17:49:53,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 227 transitions, 2528 flow [2024-06-27 17:49:53,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 227 transitions, 2435 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:53,500 INFO L231 Difference]: Finished difference. Result has 151 places, 187 transitions, 1978 flow [2024-06-27 17:49:53,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1861, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1978, PETRI_PLACES=151, PETRI_TRANSITIONS=187} [2024-06-27 17:49:53,500 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 101 predicate places. [2024-06-27 17:49:53,500 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 187 transitions, 1978 flow [2024-06-27 17:49:53,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:53,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:53,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:53,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:49:53,500 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:53,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:53,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1446339842, now seen corresponding path program 1 times [2024-06-27 17:49:53,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:53,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279989622] [2024-06-27 17:49:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:53,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:53,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:53,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279989622] [2024-06-27 17:49:53,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279989622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:53,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:53,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:53,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737395444] [2024-06-27 17:49:53,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:53,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:53,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:53,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:53,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:53,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:53,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 187 transitions, 1978 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:53,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:53,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:53,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:54,075 INFO L124 PetriNetUnfolderBase]: 2623/4449 cut-off events. [2024-06-27 17:49:54,075 INFO L125 PetriNetUnfolderBase]: For 88939/88939 co-relation queries the response was YES. [2024-06-27 17:49:54,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23795 conditions, 4449 events. 2623/4449 cut-off events. For 88939/88939 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 29473 event pairs, 727 based on Foata normal form. 12/4420 useless extension candidates. Maximal degree in co-relation 23727. Up to 3151 conditions per place. [2024-06-27 17:49:54,107 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 170 selfloop transitions, 44 changer transitions 0/228 dead transitions. [2024-06-27 17:49:54,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 228 transitions, 2560 flow [2024-06-27 17:49:54,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:54,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-27 17:49:54,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6614906832298136 [2024-06-27 17:49:54,108 INFO L175 Difference]: Start difference. First operand has 151 places, 187 transitions, 1978 flow. Second operand 7 states and 213 transitions. [2024-06-27 17:49:54,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 228 transitions, 2560 flow [2024-06-27 17:49:54,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 228 transitions, 2461 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:54,237 INFO L231 Difference]: Finished difference. Result has 153 places, 188 transitions, 2005 flow [2024-06-27 17:49:54,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2005, PETRI_PLACES=153, PETRI_TRANSITIONS=188} [2024-06-27 17:49:54,238 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 103 predicate places. [2024-06-27 17:49:54,238 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 188 transitions, 2005 flow [2024-06-27 17:49:54,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:54,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:54,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:54,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:49:54,238 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:54,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:54,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1678188455, now seen corresponding path program 1 times [2024-06-27 17:49:54,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:54,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231777930] [2024-06-27 17:49:54,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:54,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:54,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:54,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231777930] [2024-06-27 17:49:54,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231777930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:54,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:54,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:54,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800169512] [2024-06-27 17:49:54,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:54,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:54,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:54,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:54,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:54,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:54,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 188 transitions, 2005 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:54,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:54,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:54,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:54,774 INFO L124 PetriNetUnfolderBase]: 2662/4400 cut-off events. [2024-06-27 17:49:54,774 INFO L125 PetriNetUnfolderBase]: For 87280/87280 co-relation queries the response was YES. [2024-06-27 17:49:54,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24113 conditions, 4400 events. 2662/4400 cut-off events. For 87280/87280 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28411 event pairs, 540 based on Foata normal form. 1/4388 useless extension candidates. Maximal degree in co-relation 24044. Up to 3691 conditions per place. [2024-06-27 17:49:54,805 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 155 selfloop transitions, 61 changer transitions 0/230 dead transitions. [2024-06-27 17:49:54,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 230 transitions, 2868 flow [2024-06-27 17:49:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 17:49:54,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:49:54,806 INFO L175 Difference]: Start difference. First operand has 153 places, 188 transitions, 2005 flow. Second operand 6 states and 184 transitions. [2024-06-27 17:49:54,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 230 transitions, 2868 flow [2024-06-27 17:49:54,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 230 transitions, 2758 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:54,967 INFO L231 Difference]: Finished difference. Result has 155 places, 200 transitions, 2218 flow [2024-06-27 17:49:54,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1895, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2218, PETRI_PLACES=155, PETRI_TRANSITIONS=200} [2024-06-27 17:49:54,968 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 105 predicate places. [2024-06-27 17:49:54,968 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 200 transitions, 2218 flow [2024-06-27 17:49:54,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:54,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:54,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:54,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:49:54,968 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:54,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:54,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1089771833, now seen corresponding path program 2 times [2024-06-27 17:49:54,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:54,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755625756] [2024-06-27 17:49:54,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:54,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:55,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:55,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755625756] [2024-06-27 17:49:55,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755625756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:55,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:55,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:55,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118191095] [2024-06-27 17:49:55,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:55,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:55,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:55,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:55,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:55,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:55,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 200 transitions, 2218 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:55,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:55,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:55,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:55,550 INFO L124 PetriNetUnfolderBase]: 2673/4419 cut-off events. [2024-06-27 17:49:55,550 INFO L125 PetriNetUnfolderBase]: For 88922/88922 co-relation queries the response was YES. [2024-06-27 17:49:55,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24206 conditions, 4419 events. 2673/4419 cut-off events. For 88922/88922 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28561 event pairs, 540 based on Foata normal form. 1/4407 useless extension candidates. Maximal degree in co-relation 24135. Up to 3704 conditions per place. [2024-06-27 17:49:55,583 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 152 selfloop transitions, 64 changer transitions 0/230 dead transitions. [2024-06-27 17:49:55,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 230 transitions, 2961 flow [2024-06-27 17:49:55,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:55,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:55,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-27 17:49:55,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6594202898550725 [2024-06-27 17:49:55,584 INFO L175 Difference]: Start difference. First operand has 155 places, 200 transitions, 2218 flow. Second operand 6 states and 182 transitions. [2024-06-27 17:49:55,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 230 transitions, 2961 flow [2024-06-27 17:49:55,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 230 transitions, 2882 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:55,742 INFO L231 Difference]: Finished difference. Result has 160 places, 203 transitions, 2312 flow [2024-06-27 17:49:55,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2312, PETRI_PLACES=160, PETRI_TRANSITIONS=203} [2024-06-27 17:49:55,743 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 110 predicate places. [2024-06-27 17:49:55,743 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 203 transitions, 2312 flow [2024-06-27 17:49:55,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:55,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:55,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:55,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:49:55,743 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:55,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:55,744 INFO L85 PathProgramCache]: Analyzing trace with hash 179508934, now seen corresponding path program 2 times [2024-06-27 17:49:55,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:55,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499622357] [2024-06-27 17:49:55,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:55,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:55,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:55,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499622357] [2024-06-27 17:49:55,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499622357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:55,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:55,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:55,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522578077] [2024-06-27 17:49:55,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:55,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:55,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:55,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:55,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:55,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:55,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 203 transitions, 2312 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:55,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:55,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:55,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:56,374 INFO L124 PetriNetUnfolderBase]: 2740/4520 cut-off events. [2024-06-27 17:49:56,375 INFO L125 PetriNetUnfolderBase]: For 101848/101848 co-relation queries the response was YES. [2024-06-27 17:49:56,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25023 conditions, 4520 events. 2740/4520 cut-off events. For 101848/101848 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 29400 event pairs, 510 based on Foata normal form. 12/4525 useless extension candidates. Maximal degree in co-relation 24950. Up to 3592 conditions per place. [2024-06-27 17:49:56,407 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 191 selfloop transitions, 39 changer transitions 0/244 dead transitions. [2024-06-27 17:49:56,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 244 transitions, 2928 flow [2024-06-27 17:49:56,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:56,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:56,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-27 17:49:56,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6614906832298136 [2024-06-27 17:49:56,409 INFO L175 Difference]: Start difference. First operand has 160 places, 203 transitions, 2312 flow. Second operand 7 states and 213 transitions. [2024-06-27 17:49:56,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 244 transitions, 2928 flow [2024-06-27 17:49:56,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 244 transitions, 2803 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:56,564 INFO L231 Difference]: Finished difference. Result has 165 places, 204 transitions, 2305 flow [2024-06-27 17:49:56,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2187, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2305, PETRI_PLACES=165, PETRI_TRANSITIONS=204} [2024-06-27 17:49:56,564 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 115 predicate places. [2024-06-27 17:49:56,564 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 204 transitions, 2305 flow [2024-06-27 17:49:56,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:56,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:56,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:56,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:49:56,565 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:56,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:56,565 INFO L85 PathProgramCache]: Analyzing trace with hash 195636636, now seen corresponding path program 3 times [2024-06-27 17:49:56,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:56,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650655159] [2024-06-27 17:49:56,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:56,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:56,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:56,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650655159] [2024-06-27 17:49:56,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650655159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:56,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:56,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:56,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168218566] [2024-06-27 17:49:56,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:56,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:56,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:56,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:56,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:56,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:56,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 204 transitions, 2305 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:56,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:56,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:56,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:57,170 INFO L124 PetriNetUnfolderBase]: 2720/4481 cut-off events. [2024-06-27 17:49:57,170 INFO L125 PetriNetUnfolderBase]: For 100581/100581 co-relation queries the response was YES. [2024-06-27 17:49:57,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24484 conditions, 4481 events. 2720/4481 cut-off events. For 100581/100581 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 29130 event pairs, 429 based on Foata normal form. 12/4486 useless extension candidates. Maximal degree in co-relation 24410. Up to 2617 conditions per place. [2024-06-27 17:49:57,206 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 184 selfloop transitions, 46 changer transitions 0/244 dead transitions. [2024-06-27 17:49:57,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 244 transitions, 2833 flow [2024-06-27 17:49:57,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:57,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:57,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 17:49:57,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65527950310559 [2024-06-27 17:49:57,207 INFO L175 Difference]: Start difference. First operand has 165 places, 204 transitions, 2305 flow. Second operand 7 states and 211 transitions. [2024-06-27 17:49:57,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 244 transitions, 2833 flow [2024-06-27 17:49:57,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 244 transitions, 2717 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:57,347 INFO L231 Difference]: Finished difference. Result has 166 places, 203 transitions, 2231 flow [2024-06-27 17:49:57,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2135, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2231, PETRI_PLACES=166, PETRI_TRANSITIONS=203} [2024-06-27 17:49:57,347 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 116 predicate places. [2024-06-27 17:49:57,348 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 203 transitions, 2231 flow [2024-06-27 17:49:57,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:57,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:57,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:57,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:49:57,348 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:57,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:57,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1201395741, now seen corresponding path program 3 times [2024-06-27 17:49:57,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:57,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165610848] [2024-06-27 17:49:57,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:57,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:57,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:57,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165610848] [2024-06-27 17:49:57,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165610848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:57,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:57,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:57,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799878291] [2024-06-27 17:49:57,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:57,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:57,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:57,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:57,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:57,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:57,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 203 transitions, 2231 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:57,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:57,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:57,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:57,897 INFO L124 PetriNetUnfolderBase]: 2714/4475 cut-off events. [2024-06-27 17:49:57,897 INFO L125 PetriNetUnfolderBase]: For 86933/86933 co-relation queries the response was YES. [2024-06-27 17:49:57,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23893 conditions, 4475 events. 2714/4475 cut-off events. For 86933/86933 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28912 event pairs, 517 based on Foata normal form. 2/4472 useless extension candidates. Maximal degree in co-relation 23818. Up to 3776 conditions per place. [2024-06-27 17:49:57,928 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 155 selfloop transitions, 60 changer transitions 0/229 dead transitions. [2024-06-27 17:49:57,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 229 transitions, 2865 flow [2024-06-27 17:49:57,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:57,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:57,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:49:57,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-06-27 17:49:57,929 INFO L175 Difference]: Start difference. First operand has 166 places, 203 transitions, 2231 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:49:57,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 229 transitions, 2865 flow [2024-06-27 17:49:58,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 229 transitions, 2700 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 17:49:58,101 INFO L231 Difference]: Finished difference. Result has 166 places, 203 transitions, 2193 flow [2024-06-27 17:49:58,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2066, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2193, PETRI_PLACES=166, PETRI_TRANSITIONS=203} [2024-06-27 17:49:58,101 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 116 predicate places. [2024-06-27 17:49:58,101 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 203 transitions, 2193 flow [2024-06-27 17:49:58,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:58,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:58,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:58,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:49:58,102 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:58,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:58,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1189015581, now seen corresponding path program 4 times [2024-06-27 17:49:58,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:58,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648983726] [2024-06-27 17:49:58,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:58,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:58,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:58,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648983726] [2024-06-27 17:49:58,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648983726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:58,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:58,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:58,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481698778] [2024-06-27 17:49:58,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:58,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:58,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:58,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:58,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:58,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:58,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 203 transitions, 2193 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:58,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:58,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:58,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:58,657 INFO L124 PetriNetUnfolderBase]: 2698/4468 cut-off events. [2024-06-27 17:49:58,657 INFO L125 PetriNetUnfolderBase]: For 85751/85751 co-relation queries the response was YES. [2024-06-27 17:49:58,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22921 conditions, 4468 events. 2698/4468 cut-off events. For 85751/85751 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 29023 event pairs, 505 based on Foata normal form. 4/4469 useless extension candidates. Maximal degree in co-relation 22846. Up to 3919 conditions per place. [2024-06-27 17:49:58,693 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 177 selfloop transitions, 37 changer transitions 0/228 dead transitions. [2024-06-27 17:49:58,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 228 transitions, 2684 flow [2024-06-27 17:49:58,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:58,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-27 17:49:58,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180124223602484 [2024-06-27 17:49:58,695 INFO L175 Difference]: Start difference. First operand has 166 places, 203 transitions, 2193 flow. Second operand 7 states and 199 transitions. [2024-06-27 17:49:58,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 228 transitions, 2684 flow [2024-06-27 17:49:58,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 228 transitions, 2594 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:58,841 INFO L231 Difference]: Finished difference. Result has 171 places, 203 transitions, 2192 flow [2024-06-27 17:49:58,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2104, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2192, PETRI_PLACES=171, PETRI_TRANSITIONS=203} [2024-06-27 17:49:58,841 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 121 predicate places. [2024-06-27 17:49:58,841 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 203 transitions, 2192 flow [2024-06-27 17:49:58,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:58,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:58,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:58,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 17:49:58,842 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:58,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:58,842 INFO L85 PathProgramCache]: Analyzing trace with hash -837882067, now seen corresponding path program 5 times [2024-06-27 17:49:58,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:58,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849260902] [2024-06-27 17:49:58,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:58,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:58,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:58,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849260902] [2024-06-27 17:49:58,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849260902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:58,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:58,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:58,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937200660] [2024-06-27 17:49:58,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:58,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:58,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:58,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:58,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:58,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:58,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 203 transitions, 2192 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:58,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:58,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:58,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:59,468 INFO L124 PetriNetUnfolderBase]: 2700/4449 cut-off events. [2024-06-27 17:49:59,468 INFO L125 PetriNetUnfolderBase]: For 86370/86370 co-relation queries the response was YES. [2024-06-27 17:49:59,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22774 conditions, 4449 events. 2700/4449 cut-off events. For 86370/86370 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28701 event pairs, 505 based on Foata normal form. 4/4450 useless extension candidates. Maximal degree in co-relation 22698. Up to 3735 conditions per place. [2024-06-27 17:49:59,498 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 154 selfloop transitions, 75 changer transitions 0/243 dead transitions. [2024-06-27 17:49:59,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 243 transitions, 2864 flow [2024-06-27 17:49:59,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:59,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-27 17:49:59,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6708074534161491 [2024-06-27 17:49:59,499 INFO L175 Difference]: Start difference. First operand has 171 places, 203 transitions, 2192 flow. Second operand 7 states and 216 transitions. [2024-06-27 17:49:59,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 243 transitions, 2864 flow [2024-06-27 17:49:59,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 243 transitions, 2790 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:49:59,676 INFO L231 Difference]: Finished difference. Result has 172 places, 206 transitions, 2352 flow [2024-06-27 17:49:59,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2118, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2352, PETRI_PLACES=172, PETRI_TRANSITIONS=206} [2024-06-27 17:49:59,676 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 122 predicate places. [2024-06-27 17:49:59,676 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 206 transitions, 2352 flow [2024-06-27 17:49:59,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:59,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:59,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:59,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 17:49:59,677 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:59,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:59,677 INFO L85 PathProgramCache]: Analyzing trace with hash -844548307, now seen corresponding path program 6 times [2024-06-27 17:49:59,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:59,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504755773] [2024-06-27 17:49:59,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:59,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:59,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:59,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504755773] [2024-06-27 17:49:59,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504755773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:59,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:59,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:59,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516634656] [2024-06-27 17:49:59,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:59,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:59,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:59,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:59,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:59,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:49:59,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 206 transitions, 2352 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:59,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:59,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:49:59,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:00,248 INFO L124 PetriNetUnfolderBase]: 2690/4472 cut-off events. [2024-06-27 17:50:00,248 INFO L125 PetriNetUnfolderBase]: For 89792/89795 co-relation queries the response was YES. [2024-06-27 17:50:00,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23091 conditions, 4472 events. 2690/4472 cut-off events. For 89792/89795 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 29131 event pairs, 523 based on Foata normal form. 4/4462 useless extension candidates. Maximal degree in co-relation 23014. Up to 3725 conditions per place. [2024-06-27 17:50:00,283 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 147 selfloop transitions, 75 changer transitions 0/236 dead transitions. [2024-06-27 17:50:00,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 236 transitions, 2868 flow [2024-06-27 17:50:00,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:00,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:00,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-27 17:50:00,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.677536231884058 [2024-06-27 17:50:00,284 INFO L175 Difference]: Start difference. First operand has 172 places, 206 transitions, 2352 flow. Second operand 6 states and 187 transitions. [2024-06-27 17:50:00,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 236 transitions, 2868 flow [2024-06-27 17:50:00,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 236 transitions, 2695 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:00,457 INFO L231 Difference]: Finished difference. Result has 172 places, 206 transitions, 2343 flow [2024-06-27 17:50:00,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2179, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2343, PETRI_PLACES=172, PETRI_TRANSITIONS=206} [2024-06-27 17:50:00,457 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 122 predicate places. [2024-06-27 17:50:00,457 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 206 transitions, 2343 flow [2024-06-27 17:50:00,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:00,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:00,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:00,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 17:50:00,458 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:00,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:00,458 INFO L85 PathProgramCache]: Analyzing trace with hash -704261912, now seen corresponding path program 1 times [2024-06-27 17:50:00,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:00,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047917] [2024-06-27 17:50:00,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:00,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:00,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:00,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047917] [2024-06-27 17:50:00,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:00,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:00,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:00,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869750155] [2024-06-27 17:50:00,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:00,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:00,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:00,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:00,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:00,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:00,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 206 transitions, 2343 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:00,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:00,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:00,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:01,079 INFO L124 PetriNetUnfolderBase]: 2726/4669 cut-off events. [2024-06-27 17:50:01,080 INFO L125 PetriNetUnfolderBase]: For 87133/87133 co-relation queries the response was YES. [2024-06-27 17:50:01,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23369 conditions, 4669 events. 2726/4669 cut-off events. For 87133/87133 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 31220 event pairs, 640 based on Foata normal form. 2/4657 useless extension candidates. Maximal degree in co-relation 23293. Up to 3573 conditions per place. [2024-06-27 17:50:01,119 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 143 selfloop transitions, 95 changer transitions 0/252 dead transitions. [2024-06-27 17:50:01,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 252 transitions, 3225 flow [2024-06-27 17:50:01,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:01,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:01,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-27 17:50:01,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 17:50:01,121 INFO L175 Difference]: Start difference. First operand has 172 places, 206 transitions, 2343 flow. Second operand 7 states and 207 transitions. [2024-06-27 17:50:01,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 252 transitions, 3225 flow [2024-06-27 17:50:01,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 252 transitions, 2990 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:01,278 INFO L231 Difference]: Finished difference. Result has 174 places, 223 transitions, 2595 flow [2024-06-27 17:50:01,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2112, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2595, PETRI_PLACES=174, PETRI_TRANSITIONS=223} [2024-06-27 17:50:01,278 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 124 predicate places. [2024-06-27 17:50:01,278 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 223 transitions, 2595 flow [2024-06-27 17:50:01,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:01,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:01,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:01,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 17:50:01,279 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:01,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:01,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1189006498, now seen corresponding path program 2 times [2024-06-27 17:50:01,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:01,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523166203] [2024-06-27 17:50:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:01,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:01,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:01,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523166203] [2024-06-27 17:50:01,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523166203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:01,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:01,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:01,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035435874] [2024-06-27 17:50:01,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:01,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:01,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:01,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:01,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:01,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:01,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 223 transitions, 2595 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:01,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:01,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:01,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:01,985 INFO L124 PetriNetUnfolderBase]: 2790/4651 cut-off events. [2024-06-27 17:50:01,985 INFO L125 PetriNetUnfolderBase]: For 91163/91163 co-relation queries the response was YES. [2024-06-27 17:50:02,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24842 conditions, 4651 events. 2790/4651 cut-off events. For 91163/91163 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30585 event pairs, 557 based on Foata normal form. 2/4646 useless extension candidates. Maximal degree in co-relation 24764. Up to 4001 conditions per place. [2024-06-27 17:50:02,030 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 203 selfloop transitions, 47 changer transitions 0/264 dead transitions. [2024-06-27 17:50:02,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 264 transitions, 3486 flow [2024-06-27 17:50:02,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:02,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:02,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-27 17:50:02,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2024-06-27 17:50:02,034 INFO L175 Difference]: Start difference. First operand has 174 places, 223 transitions, 2595 flow. Second operand 8 states and 226 transitions. [2024-06-27 17:50:02,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 264 transitions, 3486 flow [2024-06-27 17:50:02,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 264 transitions, 3409 flow, removed 36 selfloop flow, removed 1 redundant places. [2024-06-27 17:50:02,238 INFO L231 Difference]: Finished difference. Result has 182 places, 234 transitions, 2818 flow [2024-06-27 17:50:02,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2526, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2818, PETRI_PLACES=182, PETRI_TRANSITIONS=234} [2024-06-27 17:50:02,239 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 132 predicate places. [2024-06-27 17:50:02,239 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 234 transitions, 2818 flow [2024-06-27 17:50:02,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:02,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:02,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:02,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 17:50:02,240 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:02,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:02,240 INFO L85 PathProgramCache]: Analyzing trace with hash -837872984, now seen corresponding path program 3 times [2024-06-27 17:50:02,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:02,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226630452] [2024-06-27 17:50:02,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:02,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:02,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:02,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226630452] [2024-06-27 17:50:02,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226630452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:02,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:02,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:02,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876829197] [2024-06-27 17:50:02,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:02,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:02,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:02,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:02,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:02,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:02,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 234 transitions, 2818 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:02,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:02,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:02,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:02,921 INFO L124 PetriNetUnfolderBase]: 2840/4796 cut-off events. [2024-06-27 17:50:02,933 INFO L125 PetriNetUnfolderBase]: For 95403/95403 co-relation queries the response was YES. [2024-06-27 17:50:02,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25338 conditions, 4796 events. 2840/4796 cut-off events. For 95403/95403 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 31870 event pairs, 621 based on Foata normal form. 2/4793 useless extension candidates. Maximal degree in co-relation 25256. Up to 3828 conditions per place. [2024-06-27 17:50:02,977 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 173 selfloop transitions, 99 changer transitions 0/286 dead transitions. [2024-06-27 17:50:02,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 286 transitions, 3787 flow [2024-06-27 17:50:02,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:02,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:02,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-27 17:50:02,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654891304347826 [2024-06-27 17:50:02,978 INFO L175 Difference]: Start difference. First operand has 182 places, 234 transitions, 2818 flow. Second operand 8 states and 241 transitions. [2024-06-27 17:50:02,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 286 transitions, 3787 flow [2024-06-27 17:50:03,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 286 transitions, 3708 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:03,138 INFO L231 Difference]: Finished difference. Result has 189 places, 245 transitions, 3202 flow [2024-06-27 17:50:03,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2739, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3202, PETRI_PLACES=189, PETRI_TRANSITIONS=245} [2024-06-27 17:50:03,139 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 139 predicate places. [2024-06-27 17:50:03,139 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 245 transitions, 3202 flow [2024-06-27 17:50:03,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:03,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:03,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:03,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 17:50:03,139 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:03,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:03,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1805080102, now seen corresponding path program 1 times [2024-06-27 17:50:03,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:03,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309156329] [2024-06-27 17:50:03,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:03,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:03,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:03,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309156329] [2024-06-27 17:50:03,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309156329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:03,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:03,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:03,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917976760] [2024-06-27 17:50:03,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:03,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:03,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:03,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:03,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:03,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:03,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 245 transitions, 3202 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:03,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:03,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:03,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:03,806 INFO L124 PetriNetUnfolderBase]: 2851/4740 cut-off events. [2024-06-27 17:50:03,806 INFO L125 PetriNetUnfolderBase]: For 101399/101399 co-relation queries the response was YES. [2024-06-27 17:50:03,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26225 conditions, 4740 events. 2851/4740 cut-off events. For 101399/101399 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31330 event pairs, 547 based on Foata normal form. 1/4727 useless extension candidates. Maximal degree in co-relation 26139. Up to 3967 conditions per place. [2024-06-27 17:50:03,849 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 199 selfloop transitions, 67 changer transitions 0/280 dead transitions. [2024-06-27 17:50:03,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 280 transitions, 4011 flow [2024-06-27 17:50:03,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:03,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:03,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-27 17:50:03,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.639751552795031 [2024-06-27 17:50:03,850 INFO L175 Difference]: Start difference. First operand has 189 places, 245 transitions, 3202 flow. Second operand 7 states and 206 transitions. [2024-06-27 17:50:03,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 280 transitions, 4011 flow [2024-06-27 17:50:04,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 280 transitions, 3928 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-27 17:50:04,055 INFO L231 Difference]: Finished difference. Result has 194 places, 248 transitions, 3306 flow [2024-06-27 17:50:04,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3123, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3306, PETRI_PLACES=194, PETRI_TRANSITIONS=248} [2024-06-27 17:50:04,055 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 144 predicate places. [2024-06-27 17:50:04,055 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 248 transitions, 3306 flow [2024-06-27 17:50:04,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:04,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:04,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:04,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 17:50:04,056 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:04,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:04,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1805080288, now seen corresponding path program 1 times [2024-06-27 17:50:04,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:04,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751052391] [2024-06-27 17:50:04,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:04,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:04,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:04,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751052391] [2024-06-27 17:50:04,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751052391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:04,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:04,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:04,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128950265] [2024-06-27 17:50:04,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:04,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:04,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:04,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:04,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:04,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:04,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 248 transitions, 3306 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:04,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:04,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:04,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:04,656 INFO L124 PetriNetUnfolderBase]: 2890/4844 cut-off events. [2024-06-27 17:50:04,656 INFO L125 PetriNetUnfolderBase]: For 107565/107565 co-relation queries the response was YES. [2024-06-27 17:50:04,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27076 conditions, 4844 events. 2890/4844 cut-off events. For 107565/107565 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 32345 event pairs, 593 based on Foata normal form. 1/4816 useless extension candidates. Maximal degree in co-relation 26988. Up to 3719 conditions per place. [2024-06-27 17:50:04,698 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 148 selfloop transitions, 128 changer transitions 0/290 dead transitions. [2024-06-27 17:50:04,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 290 transitions, 4348 flow [2024-06-27 17:50:04,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:04,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:04,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-27 17:50:04,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:50:04,699 INFO L175 Difference]: Start difference. First operand has 194 places, 248 transitions, 3306 flow. Second operand 7 states and 210 transitions. [2024-06-27 17:50:04,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 290 transitions, 4348 flow [2024-06-27 17:50:04,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 290 transitions, 4196 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:04,942 INFO L231 Difference]: Finished difference. Result has 196 places, 257 transitions, 3590 flow [2024-06-27 17:50:04,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3154, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3590, PETRI_PLACES=196, PETRI_TRANSITIONS=257} [2024-06-27 17:50:04,942 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 146 predicate places. [2024-06-27 17:50:04,942 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 257 transitions, 3590 flow [2024-06-27 17:50:04,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:04,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:04,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:04,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 17:50:04,943 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:04,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:04,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1353881230, now seen corresponding path program 2 times [2024-06-27 17:50:04,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:04,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935263382] [2024-06-27 17:50:04,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:04,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:05,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:05,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935263382] [2024-06-27 17:50:05,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935263382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:05,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:05,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:05,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631302033] [2024-06-27 17:50:05,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:05,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:05,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:05,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:05,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:05,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:05,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 257 transitions, 3590 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:05,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:05,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:05,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:05,651 INFO L124 PetriNetUnfolderBase]: 2915/4845 cut-off events. [2024-06-27 17:50:05,652 INFO L125 PetriNetUnfolderBase]: For 111730/111730 co-relation queries the response was YES. [2024-06-27 17:50:05,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27799 conditions, 4845 events. 2915/4845 cut-off events. For 111730/111730 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 32133 event pairs, 596 based on Foata normal form. 1/4824 useless extension candidates. Maximal degree in co-relation 27710. Up to 3742 conditions per place. [2024-06-27 17:50:05,686 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 145 selfloop transitions, 134 changer transitions 0/293 dead transitions. [2024-06-27 17:50:05,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 293 transitions, 4578 flow [2024-06-27 17:50:05,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:05,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 17:50:05,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6490683229813664 [2024-06-27 17:50:05,688 INFO L175 Difference]: Start difference. First operand has 196 places, 257 transitions, 3590 flow. Second operand 7 states and 209 transitions. [2024-06-27 17:50:05,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 293 transitions, 4578 flow [2024-06-27 17:50:05,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 293 transitions, 4362 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:05,933 INFO L231 Difference]: Finished difference. Result has 200 places, 263 transitions, 3764 flow [2024-06-27 17:50:05,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3380, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3764, PETRI_PLACES=200, PETRI_TRANSITIONS=263} [2024-06-27 17:50:05,933 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 150 predicate places. [2024-06-27 17:50:05,933 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 263 transitions, 3764 flow [2024-06-27 17:50:05,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:05,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:05,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:05,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 17:50:05,934 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:05,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:05,934 INFO L85 PathProgramCache]: Analyzing trace with hash -258889312, now seen corresponding path program 2 times [2024-06-27 17:50:05,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:05,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943209630] [2024-06-27 17:50:05,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:05,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:06,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:06,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943209630] [2024-06-27 17:50:06,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943209630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:06,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:06,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:06,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460663010] [2024-06-27 17:50:06,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:06,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:06,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:06,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:06,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:06,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:06,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 263 transitions, 3764 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:06,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:06,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:06,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:06,606 INFO L124 PetriNetUnfolderBase]: 2926/4855 cut-off events. [2024-06-27 17:50:06,606 INFO L125 PetriNetUnfolderBase]: For 117201/117201 co-relation queries the response was YES. [2024-06-27 17:50:06,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28032 conditions, 4855 events. 2926/4855 cut-off events. For 117201/117201 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 32262 event pairs, 543 based on Foata normal form. 1/4842 useless extension candidates. Maximal degree in co-relation 27942. Up to 4066 conditions per place. [2024-06-27 17:50:06,651 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 214 selfloop transitions, 70 changer transitions 0/298 dead transitions. [2024-06-27 17:50:06,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 298 transitions, 4619 flow [2024-06-27 17:50:06,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:06,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 17:50:06,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-06-27 17:50:06,652 INFO L175 Difference]: Start difference. First operand has 200 places, 263 transitions, 3764 flow. Second operand 8 states and 228 transitions. [2024-06-27 17:50:06,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 298 transitions, 4619 flow [2024-06-27 17:50:06,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 298 transitions, 4322 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:06,936 INFO L231 Difference]: Finished difference. Result has 204 places, 266 transitions, 3660 flow [2024-06-27 17:50:06,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3660, PETRI_PLACES=204, PETRI_TRANSITIONS=266} [2024-06-27 17:50:06,936 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 154 predicate places. [2024-06-27 17:50:06,937 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 266 transitions, 3660 flow [2024-06-27 17:50:06,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:06,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:06,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:06,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 17:50:06,937 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:06,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:06,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1982211808, now seen corresponding path program 3 times [2024-06-27 17:50:06,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:06,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632482551] [2024-06-27 17:50:06,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:06,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:07,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:07,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632482551] [2024-06-27 17:50:07,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632482551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:07,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:07,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:07,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543721143] [2024-06-27 17:50:07,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:07,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:07,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:07,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:07,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:07,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:07,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 266 transitions, 3660 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:07,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:07,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:07,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:07,564 INFO L124 PetriNetUnfolderBase]: 2923/4859 cut-off events. [2024-06-27 17:50:07,564 INFO L125 PetriNetUnfolderBase]: For 119486/119486 co-relation queries the response was YES. [2024-06-27 17:50:07,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27529 conditions, 4859 events. 2923/4859 cut-off events. For 119486/119486 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 32255 event pairs, 599 based on Foata normal form. 1/4838 useless extension candidates. Maximal degree in co-relation 27439. Up to 3748 conditions per place. [2024-06-27 17:50:07,607 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 148 selfloop transitions, 134 changer transitions 0/296 dead transitions. [2024-06-27 17:50:07,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 296 transitions, 4550 flow [2024-06-27 17:50:07,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:07,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:07,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 17:50:07,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6490683229813664 [2024-06-27 17:50:07,608 INFO L175 Difference]: Start difference. First operand has 204 places, 266 transitions, 3660 flow. Second operand 7 states and 209 transitions. [2024-06-27 17:50:07,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 296 transitions, 4550 flow [2024-06-27 17:50:07,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 296 transitions, 4460 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:07,857 INFO L231 Difference]: Finished difference. Result has 208 places, 266 transitions, 3844 flow [2024-06-27 17:50:07,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3570, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3844, PETRI_PLACES=208, PETRI_TRANSITIONS=266} [2024-06-27 17:50:07,858 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 158 predicate places. [2024-06-27 17:50:07,858 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 266 transitions, 3844 flow [2024-06-27 17:50:07,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:07,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:07,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:07,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 17:50:07,858 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:07,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:07,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1000147638, now seen corresponding path program 1 times [2024-06-27 17:50:07,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:07,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392643943] [2024-06-27 17:50:07,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:07,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:07,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:07,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392643943] [2024-06-27 17:50:07,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392643943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:07,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:07,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:07,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428230669] [2024-06-27 17:50:07,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:07,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:07,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:07,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:07,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:07,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:50:07,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 266 transitions, 3844 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:07,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:07,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:50:07,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:08,565 INFO L124 PetriNetUnfolderBase]: 2882/4789 cut-off events. [2024-06-27 17:50:08,565 INFO L125 PetriNetUnfolderBase]: For 133390/133390 co-relation queries the response was YES. [2024-06-27 17:50:08,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27781 conditions, 4789 events. 2882/4789 cut-off events. For 133390/133390 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 31759 event pairs, 492 based on Foata normal form. 10/4774 useless extension candidates. Maximal degree in co-relation 27689. Up to 3840 conditions per place. [2024-06-27 17:50:08,608 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 202 selfloop transitions, 37 changer transitions 0/298 dead transitions. [2024-06-27 17:50:08,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 298 transitions, 4426 flow [2024-06-27 17:50:08,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:08,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:08,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:50:08,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-06-27 17:50:08,609 INFO L175 Difference]: Start difference. First operand has 208 places, 266 transitions, 3844 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:50:08,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 298 transitions, 4426 flow [2024-06-27 17:50:08,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 298 transitions, 4162 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:08,978 INFO L231 Difference]: Finished difference. Result has 211 places, 267 transitions, 3676 flow [2024-06-27 17:50:08,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3580, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3676, PETRI_PLACES=211, PETRI_TRANSITIONS=267} [2024-06-27 17:50:08,979 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 161 predicate places. [2024-06-27 17:50:08,979 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 267 transitions, 3676 flow [2024-06-27 17:50:08,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:08,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:08,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:08,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 17:50:08,980 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:08,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:08,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1680199498, now seen corresponding path program 3 times [2024-06-27 17:50:08,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:08,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245929806] [2024-06-27 17:50:08,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:08,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:09,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:09,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245929806] [2024-06-27 17:50:09,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245929806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:09,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:09,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:09,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455644097] [2024-06-27 17:50:09,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:09,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:09,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:09,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:09,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:09,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:09,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 267 transitions, 3676 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:09,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:09,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:09,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:09,692 INFO L124 PetriNetUnfolderBase]: 3002/5128 cut-off events. [2024-06-27 17:50:09,692 INFO L125 PetriNetUnfolderBase]: For 129978/129978 co-relation queries the response was YES. [2024-06-27 17:50:09,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28354 conditions, 5128 events. 3002/5128 cut-off events. For 129978/129978 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 34869 event pairs, 635 based on Foata normal form. 1/5120 useless extension candidates. Maximal degree in co-relation 28261. Up to 4181 conditions per place. [2024-06-27 17:50:09,739 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 211 selfloop transitions, 70 changer transitions 0/295 dead transitions. [2024-06-27 17:50:09,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 295 transitions, 4392 flow [2024-06-27 17:50:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:09,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:09,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 17:50:09,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273291925465838 [2024-06-27 17:50:09,740 INFO L175 Difference]: Start difference. First operand has 211 places, 267 transitions, 3676 flow. Second operand 7 states and 202 transitions. [2024-06-27 17:50:09,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 295 transitions, 4392 flow [2024-06-27 17:50:10,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 295 transitions, 4312 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:10,023 INFO L231 Difference]: Finished difference. Result has 213 places, 267 transitions, 3742 flow [2024-06-27 17:50:10,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3596, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3742, PETRI_PLACES=213, PETRI_TRANSITIONS=267} [2024-06-27 17:50:10,024 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 163 predicate places. [2024-06-27 17:50:10,024 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 267 transitions, 3742 flow [2024-06-27 17:50:10,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:10,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:10,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:10,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 17:50:10,024 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:10,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:10,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1464426970, now seen corresponding path program 4 times [2024-06-27 17:50:10,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:10,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141964012] [2024-06-27 17:50:10,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:10,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:10,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:10,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141964012] [2024-06-27 17:50:10,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141964012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:10,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:10,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:10,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878790039] [2024-06-27 17:50:10,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:10,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:10,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:10,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:10,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:10,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:10,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 267 transitions, 3742 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:10,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:10,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:10,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:10,701 INFO L124 PetriNetUnfolderBase]: 2999/4941 cut-off events. [2024-06-27 17:50:10,701 INFO L125 PetriNetUnfolderBase]: For 131286/131286 co-relation queries the response was YES. [2024-06-27 17:50:10,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28316 conditions, 4941 events. 2999/4941 cut-off events. For 131286/131286 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 32674 event pairs, 524 based on Foata normal form. 1/4937 useless extension candidates. Maximal degree in co-relation 28222. Up to 4178 conditions per place. [2024-06-27 17:50:10,743 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 214 selfloop transitions, 66 changer transitions 0/294 dead transitions. [2024-06-27 17:50:10,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 294 transitions, 4364 flow [2024-06-27 17:50:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:10,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:10,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-27 17:50:10,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-06-27 17:50:10,744 INFO L175 Difference]: Start difference. First operand has 213 places, 267 transitions, 3742 flow. Second operand 7 states and 201 transitions. [2024-06-27 17:50:10,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 294 transitions, 4364 flow [2024-06-27 17:50:11,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 294 transitions, 4200 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:11,015 INFO L231 Difference]: Finished difference. Result has 215 places, 267 transitions, 3716 flow [2024-06-27 17:50:11,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3578, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3716, PETRI_PLACES=215, PETRI_TRANSITIONS=267} [2024-06-27 17:50:11,015 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 165 predicate places. [2024-06-27 17:50:11,016 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 267 transitions, 3716 flow [2024-06-27 17:50:11,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:11,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:11,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:11,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 17:50:11,016 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:11,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:11,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1464426784, now seen corresponding path program 4 times [2024-06-27 17:50:11,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:11,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816707641] [2024-06-27 17:50:11,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:11,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:11,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:11,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816707641] [2024-06-27 17:50:11,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816707641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:11,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:11,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:11,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277760661] [2024-06-27 17:50:11,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:11,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:11,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:11,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:11,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:11,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:11,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 267 transitions, 3716 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:11,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:11,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:11,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:11,696 INFO L124 PetriNetUnfolderBase]: 2993/5123 cut-off events. [2024-06-27 17:50:11,696 INFO L125 PetriNetUnfolderBase]: For 138040/138040 co-relation queries the response was YES. [2024-06-27 17:50:11,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28409 conditions, 5123 events. 2993/5123 cut-off events. For 138040/138040 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34950 event pairs, 670 based on Foata normal form. 2/5104 useless extension candidates. Maximal degree in co-relation 28314. Up to 3861 conditions per place. [2024-06-27 17:50:11,742 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 155 selfloop transitions, 127 changer transitions 0/296 dead transitions. [2024-06-27 17:50:11,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 296 transitions, 4534 flow [2024-06-27 17:50:11,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:11,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:11,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-27 17:50:11,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 17:50:11,743 INFO L175 Difference]: Start difference. First operand has 215 places, 267 transitions, 3716 flow. Second operand 7 states and 207 transitions. [2024-06-27 17:50:11,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 296 transitions, 4534 flow [2024-06-27 17:50:11,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 296 transitions, 4338 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:11,997 INFO L231 Difference]: Finished difference. Result has 215 places, 267 transitions, 3781 flow [2024-06-27 17:50:11,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3520, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3781, PETRI_PLACES=215, PETRI_TRANSITIONS=267} [2024-06-27 17:50:11,998 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 165 predicate places. [2024-06-27 17:50:11,998 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 267 transitions, 3781 flow [2024-06-27 17:50:11,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:11,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:11,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:11,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 17:50:11,998 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:11,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:11,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1080641824, now seen corresponding path program 5 times [2024-06-27 17:50:11,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:11,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015650280] [2024-06-27 17:50:11,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:11,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:12,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:12,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015650280] [2024-06-27 17:50:12,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015650280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:12,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:12,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:12,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510852262] [2024-06-27 17:50:12,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:12,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:12,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:12,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:12,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:12,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:12,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 267 transitions, 3781 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:12,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:12,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:12,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:12,805 INFO L124 PetriNetUnfolderBase]: 3001/4986 cut-off events. [2024-06-27 17:50:12,805 INFO L125 PetriNetUnfolderBase]: For 138484/138484 co-relation queries the response was YES. [2024-06-27 17:50:12,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28664 conditions, 4986 events. 3001/4986 cut-off events. For 138484/138484 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 33170 event pairs, 568 based on Foata normal form. 2/4981 useless extension candidates. Maximal degree in co-relation 28569. Up to 4298 conditions per place. [2024-06-27 17:50:12,853 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 236 selfloop transitions, 50 changer transitions 0/300 dead transitions. [2024-06-27 17:50:12,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 300 transitions, 4684 flow [2024-06-27 17:50:12,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:12,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:12,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-27 17:50:12,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2024-06-27 17:50:12,854 INFO L175 Difference]: Start difference. First operand has 215 places, 267 transitions, 3781 flow. Second operand 8 states and 226 transitions. [2024-06-27 17:50:12,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 300 transitions, 4684 flow [2024-06-27 17:50:13,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 300 transitions, 4320 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:13,202 INFO L231 Difference]: Finished difference. Result has 217 places, 270 transitions, 3591 flow [2024-06-27 17:50:13,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3426, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3591, PETRI_PLACES=217, PETRI_TRANSITIONS=270} [2024-06-27 17:50:13,202 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 167 predicate places. [2024-06-27 17:50:13,203 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 270 transitions, 3591 flow [2024-06-27 17:50:13,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:13,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:13,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:13,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 17:50:13,203 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:13,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:13,204 INFO L85 PathProgramCache]: Analyzing trace with hash -410955300, now seen corresponding path program 6 times [2024-06-27 17:50:13,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:13,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664233130] [2024-06-27 17:50:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:13,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:13,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:13,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:13,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:13,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664233130] [2024-06-27 17:50:13,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664233130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:13,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:13,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:13,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6204469] [2024-06-27 17:50:13,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:13,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:13,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:13,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:13,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:13,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:13,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 270 transitions, 3591 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:13,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:13,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:13,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:13,962 INFO L124 PetriNetUnfolderBase]: 3026/5037 cut-off events. [2024-06-27 17:50:13,962 INFO L125 PetriNetUnfolderBase]: For 141402/141405 co-relation queries the response was YES. [2024-06-27 17:50:13,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28645 conditions, 5037 events. 3026/5037 cut-off events. For 141402/141405 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 33715 event pairs, 540 based on Foata normal form. 3/5022 useless extension candidates. Maximal degree in co-relation 28549. Up to 4071 conditions per place. [2024-06-27 17:50:14,009 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 188 selfloop transitions, 107 changer transitions 0/309 dead transitions. [2024-06-27 17:50:14,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 309 transitions, 4670 flow [2024-06-27 17:50:14,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:14,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:14,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 17:50:14,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65527950310559 [2024-06-27 17:50:14,010 INFO L175 Difference]: Start difference. First operand has 217 places, 270 transitions, 3591 flow. Second operand 7 states and 211 transitions. [2024-06-27 17:50:14,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 309 transitions, 4670 flow [2024-06-27 17:50:14,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 309 transitions, 4538 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:14,337 INFO L231 Difference]: Finished difference. Result has 218 places, 276 transitions, 3798 flow [2024-06-27 17:50:14,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3459, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3798, PETRI_PLACES=218, PETRI_TRANSITIONS=276} [2024-06-27 17:50:14,338 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 168 predicate places. [2024-06-27 17:50:14,338 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 276 transitions, 3798 flow [2024-06-27 17:50:14,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:14,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:14,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:14,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 17:50:14,338 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:14,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:14,338 INFO L85 PathProgramCache]: Analyzing trace with hash -204539010, now seen corresponding path program 7 times [2024-06-27 17:50:14,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:14,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242352518] [2024-06-27 17:50:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:14,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:14,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:14,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242352518] [2024-06-27 17:50:14,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242352518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:14,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:14,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:14,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852074752] [2024-06-27 17:50:14,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:14,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:14,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:14,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:14,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:14,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:14,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 276 transitions, 3798 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:14,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:14,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:14,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:15,031 INFO L124 PetriNetUnfolderBase]: 3020/5104 cut-off events. [2024-06-27 17:50:15,031 INFO L125 PetriNetUnfolderBase]: For 145158/145158 co-relation queries the response was YES. [2024-06-27 17:50:15,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28883 conditions, 5104 events. 3020/5104 cut-off events. For 145158/145158 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 34565 event pairs, 571 based on Foata normal form. 2/5096 useless extension candidates. Maximal degree in co-relation 28786. Up to 4066 conditions per place. [2024-06-27 17:50:15,078 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 197 selfloop transitions, 106 changer transitions 0/317 dead transitions. [2024-06-27 17:50:15,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 317 transitions, 4700 flow [2024-06-27 17:50:15,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:15,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:15,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 242 transitions. [2024-06-27 17:50:15,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.657608695652174 [2024-06-27 17:50:15,079 INFO L175 Difference]: Start difference. First operand has 218 places, 276 transitions, 3798 flow. Second operand 8 states and 242 transitions. [2024-06-27 17:50:15,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 317 transitions, 4700 flow [2024-06-27 17:50:15,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 317 transitions, 4446 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:15,503 INFO L231 Difference]: Finished difference. Result has 222 places, 276 transitions, 3768 flow [2024-06-27 17:50:15,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3544, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3768, PETRI_PLACES=222, PETRI_TRANSITIONS=276} [2024-06-27 17:50:15,503 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 172 predicate places. [2024-06-27 17:50:15,503 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 276 transitions, 3768 flow [2024-06-27 17:50:15,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:15,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:15,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:15,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 17:50:15,504 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:15,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:15,504 INFO L85 PathProgramCache]: Analyzing trace with hash -411192450, now seen corresponding path program 8 times [2024-06-27 17:50:15,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:15,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84413591] [2024-06-27 17:50:15,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:15,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:15,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:15,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84413591] [2024-06-27 17:50:15,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84413591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:15,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:15,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:15,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111152847] [2024-06-27 17:50:15,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:15,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:15,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:15,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:15,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:15,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:15,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 276 transitions, 3768 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:15,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:15,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:15,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:16,183 INFO L124 PetriNetUnfolderBase]: 3017/4994 cut-off events. [2024-06-27 17:50:16,183 INFO L125 PetriNetUnfolderBase]: For 145091/145094 co-relation queries the response was YES. [2024-06-27 17:50:16,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28582 conditions, 4994 events. 3017/4994 cut-off events. For 145091/145094 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 33263 event pairs, 534 based on Foata normal form. 3/4987 useless extension candidates. Maximal degree in co-relation 28485. Up to 4064 conditions per place. [2024-06-27 17:50:16,227 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 190 selfloop transitions, 107 changer transitions 0/311 dead transitions. [2024-06-27 17:50:16,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 311 transitions, 4648 flow [2024-06-27 17:50:16,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-27 17:50:16,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6614906832298136 [2024-06-27 17:50:16,228 INFO L175 Difference]: Start difference. First operand has 222 places, 276 transitions, 3768 flow. Second operand 7 states and 213 transitions. [2024-06-27 17:50:16,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 311 transitions, 4648 flow [2024-06-27 17:50:16,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 311 transitions, 4434 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:16,497 INFO L231 Difference]: Finished difference. Result has 223 places, 276 transitions, 3778 flow [2024-06-27 17:50:16,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3558, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3778, PETRI_PLACES=223, PETRI_TRANSITIONS=276} [2024-06-27 17:50:16,498 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 173 predicate places. [2024-06-27 17:50:16,498 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 276 transitions, 3778 flow [2024-06-27 17:50:16,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:16,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:16,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:16,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 17:50:16,498 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:16,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:16,499 INFO L85 PathProgramCache]: Analyzing trace with hash -398434152, now seen corresponding path program 2 times [2024-06-27 17:50:16,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:16,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810797814] [2024-06-27 17:50:16,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:16,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:16,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:16,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810797814] [2024-06-27 17:50:16,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810797814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:16,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:16,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:16,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434125476] [2024-06-27 17:50:16,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:16,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:16,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:16,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:16,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:16,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:50:16,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 276 transitions, 3778 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:16,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:16,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:50:16,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:17,224 INFO L124 PetriNetUnfolderBase]: 2976/4952 cut-off events. [2024-06-27 17:50:17,224 INFO L125 PetriNetUnfolderBase]: For 159422/159422 co-relation queries the response was YES. [2024-06-27 17:50:17,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28355 conditions, 4952 events. 2976/4952 cut-off events. For 159422/159422 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33218 event pairs, 369 based on Foata normal form. 11/4934 useless extension candidates. Maximal degree in co-relation 28258. Up to 3971 conditions per place. [2024-06-27 17:50:17,271 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 217 selfloop transitions, 27 changer transitions 0/306 dead transitions. [2024-06-27 17:50:17,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 306 transitions, 4374 flow [2024-06-27 17:50:17,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:17,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:17,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-06-27 17:50:17,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2024-06-27 17:50:17,272 INFO L175 Difference]: Start difference. First operand has 223 places, 276 transitions, 3778 flow. Second operand 5 states and 160 transitions. [2024-06-27 17:50:17,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 306 transitions, 4374 flow [2024-06-27 17:50:17,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 306 transitions, 4017 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 17:50:17,689 INFO L231 Difference]: Finished difference. Result has 220 places, 278 transitions, 3512 flow [2024-06-27 17:50:17,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3421, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3512, PETRI_PLACES=220, PETRI_TRANSITIONS=278} [2024-06-27 17:50:17,690 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 170 predicate places. [2024-06-27 17:50:17,690 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 278 transitions, 3512 flow [2024-06-27 17:50:17,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:17,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:17,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:17,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 17:50:17,691 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:17,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:17,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1302151664, now seen corresponding path program 3 times [2024-06-27 17:50:17,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:17,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575668085] [2024-06-27 17:50:17,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:17,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:17,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:17,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575668085] [2024-06-27 17:50:17,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575668085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:17,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:17,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:17,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988993671] [2024-06-27 17:50:17,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:17,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:17,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:17,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:17,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:17,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:50:17,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 278 transitions, 3512 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:17,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:17,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:50:17,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:18,411 INFO L124 PetriNetUnfolderBase]: 3038/5218 cut-off events. [2024-06-27 17:50:18,411 INFO L125 PetriNetUnfolderBase]: For 160733/160743 co-relation queries the response was YES. [2024-06-27 17:50:18,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28737 conditions, 5218 events. 3038/5218 cut-off events. For 160733/160743 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 36407 event pairs, 987 based on Foata normal form. 20/5176 useless extension candidates. Maximal degree in co-relation 28639. Up to 4110 conditions per place. [2024-06-27 17:50:18,463 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 216 selfloop transitions, 29 changer transitions 0/307 dead transitions. [2024-06-27 17:50:18,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 307 transitions, 4104 flow [2024-06-27 17:50:18,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:18,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:18,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 17:50:18,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 17:50:18,468 INFO L175 Difference]: Start difference. First operand has 220 places, 278 transitions, 3512 flow. Second operand 6 states and 180 transitions. [2024-06-27 17:50:18,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 307 transitions, 4104 flow [2024-06-27 17:50:18,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 307 transitions, 4015 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:18,822 INFO L231 Difference]: Finished difference. Result has 222 places, 279 transitions, 3507 flow [2024-06-27 17:50:18,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3425, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3507, PETRI_PLACES=222, PETRI_TRANSITIONS=279} [2024-06-27 17:50:18,822 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 172 predicate places. [2024-06-27 17:50:18,822 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 279 transitions, 3507 flow [2024-06-27 17:50:18,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:18,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:18,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:18,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 17:50:18,823 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:18,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:18,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1315111214, now seen corresponding path program 4 times [2024-06-27 17:50:18,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:18,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262870193] [2024-06-27 17:50:18,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:18,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:18,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:18,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262870193] [2024-06-27 17:50:18,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262870193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:18,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:18,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:18,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303280704] [2024-06-27 17:50:18,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:18,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:18,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:18,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:18,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:18,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 17:50:18,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 279 transitions, 3507 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:18,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:18,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 17:50:18,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:19,562 INFO L124 PetriNetUnfolderBase]: 3058/5104 cut-off events. [2024-06-27 17:50:19,562 INFO L125 PetriNetUnfolderBase]: For 151272/151272 co-relation queries the response was YES. [2024-06-27 17:50:19,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28464 conditions, 5104 events. 3058/5104 cut-off events. For 151272/151272 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 34669 event pairs, 533 based on Foata normal form. 8/5073 useless extension candidates. Maximal degree in co-relation 28365. Up to 4031 conditions per place. [2024-06-27 17:50:19,611 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 222 selfloop transitions, 30 changer transitions 0/314 dead transitions. [2024-06-27 17:50:19,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 314 transitions, 4137 flow [2024-06-27 17:50:19,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:19,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-27 17:50:19,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.677536231884058 [2024-06-27 17:50:19,612 INFO L175 Difference]: Start difference. First operand has 222 places, 279 transitions, 3507 flow. Second operand 6 states and 187 transitions. [2024-06-27 17:50:19,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 314 transitions, 4137 flow [2024-06-27 17:50:19,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 314 transitions, 4077 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:19,991 INFO L231 Difference]: Finished difference. Result has 224 places, 280 transitions, 3531 flow [2024-06-27 17:50:19,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3447, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3531, PETRI_PLACES=224, PETRI_TRANSITIONS=280} [2024-06-27 17:50:19,992 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 174 predicate places. [2024-06-27 17:50:19,992 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 280 transitions, 3531 flow [2024-06-27 17:50:19,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:19,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:19,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:19,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 17:50:19,993 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:19,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:19,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1677352458, now seen corresponding path program 1 times [2024-06-27 17:50:19,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:19,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055392567] [2024-06-27 17:50:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:19,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:20,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:20,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055392567] [2024-06-27 17:50:20,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055392567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:20,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:20,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:20,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494444948] [2024-06-27 17:50:20,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:20,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:20,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:20,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:20,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:20,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:20,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 280 transitions, 3531 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:20,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:20,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:20,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:20,772 INFO L124 PetriNetUnfolderBase]: 3276/5551 cut-off events. [2024-06-27 17:50:20,773 INFO L125 PetriNetUnfolderBase]: For 157438/157438 co-relation queries the response was YES. [2024-06-27 17:50:20,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30353 conditions, 5551 events. 3276/5551 cut-off events. For 157438/157438 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 38183 event pairs, 571 based on Foata normal form. 4/5546 useless extension candidates. Maximal degree in co-relation 30253. Up to 4438 conditions per place. [2024-06-27 17:50:20,827 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 227 selfloop transitions, 78 changer transitions 0/319 dead transitions. [2024-06-27 17:50:20,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 319 transitions, 4399 flow [2024-06-27 17:50:20,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:20,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-27 17:50:20,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 17:50:20,828 INFO L175 Difference]: Start difference. First operand has 224 places, 280 transitions, 3531 flow. Second operand 7 states and 207 transitions. [2024-06-27 17:50:20,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 319 transitions, 4399 flow [2024-06-27 17:50:21,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 319 transitions, 4331 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:21,209 INFO L231 Difference]: Finished difference. Result has 227 places, 286 transitions, 3707 flow [2024-06-27 17:50:21,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3463, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3707, PETRI_PLACES=227, PETRI_TRANSITIONS=286} [2024-06-27 17:50:21,210 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 177 predicate places. [2024-06-27 17:50:21,210 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 286 transitions, 3707 flow [2024-06-27 17:50:21,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:21,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:21,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:21,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 17:50:21,210 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:21,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:21,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1680209418, now seen corresponding path program 2 times [2024-06-27 17:50:21,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:21,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341088142] [2024-06-27 17:50:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:21,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:21,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:21,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341088142] [2024-06-27 17:50:21,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341088142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:21,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:21,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:21,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095867347] [2024-06-27 17:50:21,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:21,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:21,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:21,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:21,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:21,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:21,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 286 transitions, 3707 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:21,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:21,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:21,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:22,018 INFO L124 PetriNetUnfolderBase]: 3312/5640 cut-off events. [2024-06-27 17:50:22,018 INFO L125 PetriNetUnfolderBase]: For 164132/164132 co-relation queries the response was YES. [2024-06-27 17:50:22,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31127 conditions, 5640 events. 3312/5640 cut-off events. For 164132/164132 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 39070 event pairs, 677 based on Foata normal form. 4/5633 useless extension candidates. Maximal degree in co-relation 31026. Up to 4612 conditions per place. [2024-06-27 17:50:22,065 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 230 selfloop transitions, 73 changer transitions 0/317 dead transitions. [2024-06-27 17:50:22,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 317 transitions, 4421 flow [2024-06-27 17:50:22,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:22,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 17:50:22,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273291925465838 [2024-06-27 17:50:22,066 INFO L175 Difference]: Start difference. First operand has 227 places, 286 transitions, 3707 flow. Second operand 7 states and 202 transitions. [2024-06-27 17:50:22,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 317 transitions, 4421 flow [2024-06-27 17:50:22,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 317 transitions, 4272 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:22,454 INFO L231 Difference]: Finished difference. Result has 231 places, 289 transitions, 3760 flow [2024-06-27 17:50:22,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3572, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3760, PETRI_PLACES=231, PETRI_TRANSITIONS=289} [2024-06-27 17:50:22,455 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 181 predicate places. [2024-06-27 17:50:22,455 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 289 transitions, 3760 flow [2024-06-27 17:50:22,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:22,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:22,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:22,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 17:50:22,456 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:22,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:22,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1795500588, now seen corresponding path program 3 times [2024-06-27 17:50:22,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:22,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173645539] [2024-06-27 17:50:22,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:22,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:22,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:22,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173645539] [2024-06-27 17:50:22,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173645539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:22,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:22,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:22,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353117100] [2024-06-27 17:50:22,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:22,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:22,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:22,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:22,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:22,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:22,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 289 transitions, 3760 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:22,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:22,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:22,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:23,302 INFO L124 PetriNetUnfolderBase]: 3476/5836 cut-off events. [2024-06-27 17:50:23,302 INFO L125 PetriNetUnfolderBase]: For 195312/195312 co-relation queries the response was YES. [2024-06-27 17:50:23,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32502 conditions, 5836 events. 3476/5836 cut-off events. For 195312/195312 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 40426 event pairs, 1101 based on Foata normal form. 20/5808 useless extension candidates. Maximal degree in co-relation 32399. Up to 4873 conditions per place. [2024-06-27 17:50:23,356 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 270 selfloop transitions, 42 changer transitions 0/326 dead transitions. [2024-06-27 17:50:23,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 326 transitions, 4551 flow [2024-06-27 17:50:23,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:23,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 17:50:23,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168478260869565 [2024-06-27 17:50:23,357 INFO L175 Difference]: Start difference. First operand has 231 places, 289 transitions, 3760 flow. Second operand 8 states and 227 transitions. [2024-06-27 17:50:23,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 326 transitions, 4551 flow [2024-06-27 17:50:23,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 326 transitions, 4421 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:23,836 INFO L231 Difference]: Finished difference. Result has 235 places, 294 transitions, 3806 flow [2024-06-27 17:50:23,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3632, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3806, PETRI_PLACES=235, PETRI_TRANSITIONS=294} [2024-06-27 17:50:23,843 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 185 predicate places. [2024-06-27 17:50:23,843 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 294 transitions, 3806 flow [2024-06-27 17:50:23,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:23,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:23,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:23,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 17:50:23,844 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:23,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:23,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1795685286, now seen corresponding path program 1 times [2024-06-27 17:50:23,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:23,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183339345] [2024-06-27 17:50:23,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:23,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:23,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:23,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183339345] [2024-06-27 17:50:23,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183339345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:23,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:23,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:23,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817880343] [2024-06-27 17:50:23,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:23,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:23,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:23,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:23,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:23,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:23,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 294 transitions, 3806 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:23,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:23,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:23,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:24,639 INFO L124 PetriNetUnfolderBase]: 3494/5700 cut-off events. [2024-06-27 17:50:24,639 INFO L125 PetriNetUnfolderBase]: For 171564/171564 co-relation queries the response was YES. [2024-06-27 17:50:24,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32738 conditions, 5700 events. 3494/5700 cut-off events. For 171564/171564 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 38450 event pairs, 561 based on Foata normal form. 2/5699 useless extension candidates. Maximal degree in co-relation 32634. Up to 5113 conditions per place. [2024-06-27 17:50:24,691 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 284 selfloop transitions, 24 changer transitions 0/322 dead transitions. [2024-06-27 17:50:24,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 322 transitions, 4523 flow [2024-06-27 17:50:24,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:24,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:24,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-27 17:50:24,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024844720496895 [2024-06-27 17:50:24,692 INFO L175 Difference]: Start difference. First operand has 235 places, 294 transitions, 3806 flow. Second operand 7 states and 194 transitions. [2024-06-27 17:50:24,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 322 transitions, 4523 flow [2024-06-27 17:50:25,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 322 transitions, 4415 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:25,102 INFO L231 Difference]: Finished difference. Result has 237 places, 297 transitions, 3806 flow [2024-06-27 17:50:25,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3698, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3806, PETRI_PLACES=237, PETRI_TRANSITIONS=297} [2024-06-27 17:50:25,103 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 187 predicate places. [2024-06-27 17:50:25,103 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 297 transitions, 3806 flow [2024-06-27 17:50:25,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:25,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:25,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:25,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 17:50:25,103 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:25,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:25,104 INFO L85 PathProgramCache]: Analyzing trace with hash -204262366, now seen corresponding path program 4 times [2024-06-27 17:50:25,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:25,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425215469] [2024-06-27 17:50:25,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:25,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:25,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:25,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425215469] [2024-06-27 17:50:25,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425215469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:25,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:25,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:25,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501163125] [2024-06-27 17:50:25,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:25,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:25,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:25,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:25,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:25,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:25,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 297 transitions, 3806 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:25,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:25,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:25,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:25,998 INFO L124 PetriNetUnfolderBase]: 3635/6207 cut-off events. [2024-06-27 17:50:25,998 INFO L125 PetriNetUnfolderBase]: For 208473/208473 co-relation queries the response was YES. [2024-06-27 17:50:26,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33934 conditions, 6207 events. 3635/6207 cut-off events. For 208473/208473 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 43767 event pairs, 711 based on Foata normal form. 20/6220 useless extension candidates. Maximal degree in co-relation 33828. Up to 4703 conditions per place. [2024-06-27 17:50:26,057 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 242 selfloop transitions, 91 changer transitions 0/347 dead transitions. [2024-06-27 17:50:26,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 347 transitions, 4662 flow [2024-06-27 17:50:26,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:26,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:26,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 246 transitions. [2024-06-27 17:50:26,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6684782608695652 [2024-06-27 17:50:26,058 INFO L175 Difference]: Start difference. First operand has 237 places, 297 transitions, 3806 flow. Second operand 8 states and 246 transitions. [2024-06-27 17:50:26,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 347 transitions, 4662 flow [2024-06-27 17:50:26,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 347 transitions, 4583 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:26,400 INFO L231 Difference]: Finished difference. Result has 241 places, 301 transitions, 4003 flow [2024-06-27 17:50:26,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3727, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4003, PETRI_PLACES=241, PETRI_TRANSITIONS=301} [2024-06-27 17:50:26,400 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 191 predicate places. [2024-06-27 17:50:26,400 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 301 transitions, 4003 flow [2024-06-27 17:50:26,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:26,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:26,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:26,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 17:50:26,401 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:26,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:26,401 INFO L85 PathProgramCache]: Analyzing trace with hash 23823482, now seen corresponding path program 2 times [2024-06-27 17:50:26,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:26,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114956478] [2024-06-27 17:50:26,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:26,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:26,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:26,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114956478] [2024-06-27 17:50:26,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114956478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:26,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:26,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:26,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328779802] [2024-06-27 17:50:26,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:26,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:26,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:26,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:26,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:26,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:26,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 301 transitions, 4003 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:26,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:26,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:26,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:27,253 INFO L124 PetriNetUnfolderBase]: 3653/6127 cut-off events. [2024-06-27 17:50:27,253 INFO L125 PetriNetUnfolderBase]: For 188452/188452 co-relation queries the response was YES. [2024-06-27 17:50:27,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34952 conditions, 6127 events. 3653/6127 cut-off events. For 188452/188452 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 42869 event pairs, 1218 based on Foata normal form. 2/6073 useless extension candidates. Maximal degree in co-relation 34845. Up to 5336 conditions per place. [2024-06-27 17:50:27,314 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 284 selfloop transitions, 24 changer transitions 0/322 dead transitions. [2024-06-27 17:50:27,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 322 transitions, 4705 flow [2024-06-27 17:50:27,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:27,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-27 17:50:27,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6347826086956522 [2024-06-27 17:50:27,315 INFO L175 Difference]: Start difference. First operand has 241 places, 301 transitions, 4003 flow. Second operand 5 states and 146 transitions. [2024-06-27 17:50:27,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 322 transitions, 4705 flow [2024-06-27 17:50:27,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 322 transitions, 4505 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:27,892 INFO L231 Difference]: Finished difference. Result has 240 places, 303 transitions, 3905 flow [2024-06-27 17:50:27,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3805, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3905, PETRI_PLACES=240, PETRI_TRANSITIONS=303} [2024-06-27 17:50:27,893 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 190 predicate places. [2024-06-27 17:50:27,893 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 303 transitions, 3905 flow [2024-06-27 17:50:27,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:27,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:27,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:27,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 17:50:27,893 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:27,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:27,894 INFO L85 PathProgramCache]: Analyzing trace with hash 32394362, now seen corresponding path program 3 times [2024-06-27 17:50:27,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:27,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874558425] [2024-06-27 17:50:27,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:27,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:27,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:27,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:27,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874558425] [2024-06-27 17:50:27,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874558425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:27,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:27,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:27,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495556168] [2024-06-27 17:50:27,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:27,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:27,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:27,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:27,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:28,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:28,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 303 transitions, 3905 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:28,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:28,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:28,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:28,747 INFO L124 PetriNetUnfolderBase]: 3648/6105 cut-off events. [2024-06-27 17:50:28,747 INFO L125 PetriNetUnfolderBase]: For 181673/181676 co-relation queries the response was YES. [2024-06-27 17:50:28,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34027 conditions, 6105 events. 3648/6105 cut-off events. For 181673/181676 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 42515 event pairs, 1201 based on Foata normal form. 4/6059 useless extension candidates. Maximal degree in co-relation 33919. Up to 5297 conditions per place. [2024-06-27 17:50:28,807 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 283 selfloop transitions, 25 changer transitions 0/322 dead transitions. [2024-06-27 17:50:28,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 322 transitions, 4603 flow [2024-06-27 17:50:28,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:28,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:28,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-27 17:50:28,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217391304347826 [2024-06-27 17:50:28,808 INFO L175 Difference]: Start difference. First operand has 240 places, 303 transitions, 3905 flow. Second operand 5 states and 143 transitions. [2024-06-27 17:50:28,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 322 transitions, 4603 flow [2024-06-27 17:50:29,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 322 transitions, 4519 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:29,279 INFO L231 Difference]: Finished difference. Result has 242 places, 305 transitions, 3924 flow [2024-06-27 17:50:29,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3825, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3924, PETRI_PLACES=242, PETRI_TRANSITIONS=305} [2024-06-27 17:50:29,279 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 192 predicate places. [2024-06-27 17:50:29,279 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 305 transitions, 3924 flow [2024-06-27 17:50:29,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:29,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:29,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:29,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 17:50:29,280 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:29,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:29,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1264352212, now seen corresponding path program 1 times [2024-06-27 17:50:29,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:29,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753897817] [2024-06-27 17:50:29,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:29,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:29,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:29,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753897817] [2024-06-27 17:50:29,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753897817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:29,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:29,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:50:29,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020658613] [2024-06-27 17:50:29,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:29,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:50:29,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:29,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:50:29,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:50:29,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 46 [2024-06-27 17:50:29,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 305 transitions, 3924 flow. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:29,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:29,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 46 [2024-06-27 17:50:29,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:29,985 INFO L124 PetriNetUnfolderBase]: 2282/5041 cut-off events. [2024-06-27 17:50:29,986 INFO L125 PetriNetUnfolderBase]: For 80234/80463 co-relation queries the response was YES. [2024-06-27 17:50:30,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19869 conditions, 5041 events. 2282/5041 cut-off events. For 80234/80463 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 43615 event pairs, 295 based on Foata normal form. 238/4926 useless extension candidates. Maximal degree in co-relation 19760. Up to 1919 conditions per place. [2024-06-27 17:50:30,035 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 30 selfloop transitions, 80 changer transitions 0/322 dead transitions. [2024-06-27 17:50:30,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 322 transitions, 4238 flow [2024-06-27 17:50:30,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:50:30,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:50:30,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-06-27 17:50:30,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7663043478260869 [2024-06-27 17:50:30,036 INFO L175 Difference]: Start difference. First operand has 242 places, 305 transitions, 3924 flow. Second operand 4 states and 141 transitions. [2024-06-27 17:50:30,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 322 transitions, 4238 flow [2024-06-27 17:50:30,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 322 transitions, 4155 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:30,251 INFO L231 Difference]: Finished difference. Result has 244 places, 309 transitions, 4207 flow [2024-06-27 17:50:30,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3841, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4207, PETRI_PLACES=244, PETRI_TRANSITIONS=309} [2024-06-27 17:50:30,252 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 194 predicate places. [2024-06-27 17:50:30,252 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 309 transitions, 4207 flow [2024-06-27 17:50:30,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:30,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:30,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:30,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 17:50:30,253 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:30,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:30,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1696547374, now seen corresponding path program 1 times [2024-06-27 17:50:30,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:30,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89588840] [2024-06-27 17:50:30,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:30,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:30,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:30,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89588840] [2024-06-27 17:50:30,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89588840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:30,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:30,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:30,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739936331] [2024-06-27 17:50:30,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:30,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:30,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:30,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:30,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:30,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:30,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 309 transitions, 4207 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:30,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:30,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:30,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:31,304 INFO L124 PetriNetUnfolderBase]: 3568/6070 cut-off events. [2024-06-27 17:50:31,304 INFO L125 PetriNetUnfolderBase]: For 184052/184082 co-relation queries the response was YES. [2024-06-27 17:50:31,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34708 conditions, 6070 events. 3568/6070 cut-off events. For 184052/184082 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 42432 event pairs, 1088 based on Foata normal form. 1/5819 useless extension candidates. Maximal degree in co-relation 34597. Up to 5360 conditions per place. [2024-06-27 17:50:31,362 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 296 selfloop transitions, 31 changer transitions 0/342 dead transitions. [2024-06-27 17:50:31,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 342 transitions, 5137 flow [2024-06-27 17:50:31,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:31,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:31,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-27 17:50:31,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118012422360248 [2024-06-27 17:50:31,363 INFO L175 Difference]: Start difference. First operand has 244 places, 309 transitions, 4207 flow. Second operand 7 states and 197 transitions. [2024-06-27 17:50:31,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 342 transitions, 5137 flow [2024-06-27 17:50:31,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 342 transitions, 5135 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:50:31,960 INFO L231 Difference]: Finished difference. Result has 250 places, 315 transitions, 4371 flow [2024-06-27 17:50:31,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4205, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4371, PETRI_PLACES=250, PETRI_TRANSITIONS=315} [2024-06-27 17:50:31,960 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 200 predicate places. [2024-06-27 17:50:31,960 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 315 transitions, 4371 flow [2024-06-27 17:50:31,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:31,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:31,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 17:50:31,961 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:31,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:31,961 INFO L85 PathProgramCache]: Analyzing trace with hash 971952140, now seen corresponding path program 2 times [2024-06-27 17:50:31,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:31,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925168436] [2024-06-27 17:50:31,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:31,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:32,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:32,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925168436] [2024-06-27 17:50:32,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925168436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:32,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:32,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:32,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252136586] [2024-06-27 17:50:32,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:32,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:32,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:32,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:32,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:32,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:32,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 315 transitions, 4371 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:32,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:32,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:32,904 INFO L124 PetriNetUnfolderBase]: 3580/6088 cut-off events. [2024-06-27 17:50:32,904 INFO L125 PetriNetUnfolderBase]: For 190478/190508 co-relation queries the response was YES. [2024-06-27 17:50:32,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35167 conditions, 6088 events. 3580/6088 cut-off events. For 190478/190508 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 42461 event pairs, 1088 based on Foata normal form. 1/5835 useless extension candidates. Maximal degree in co-relation 35054. Up to 5372 conditions per place. [2024-06-27 17:50:32,960 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 297 selfloop transitions, 38 changer transitions 0/350 dead transitions. [2024-06-27 17:50:32,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 350 transitions, 5316 flow [2024-06-27 17:50:32,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:32,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:32,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-27 17:50:32,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821256038647343 [2024-06-27 17:50:32,960 INFO L175 Difference]: Start difference. First operand has 250 places, 315 transitions, 4371 flow. Second operand 9 states and 241 transitions. [2024-06-27 17:50:32,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 350 transitions, 5316 flow [2024-06-27 17:50:33,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 350 transitions, 5179 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:33,371 INFO L231 Difference]: Finished difference. Result has 255 places, 321 transitions, 4401 flow [2024-06-27 17:50:33,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4250, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4401, PETRI_PLACES=255, PETRI_TRANSITIONS=321} [2024-06-27 17:50:33,371 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 205 predicate places. [2024-06-27 17:50:33,371 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 321 transitions, 4401 flow [2024-06-27 17:50:33,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:33,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:33,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 17:50:33,372 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:33,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash -171363254, now seen corresponding path program 1 times [2024-06-27 17:50:33,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:33,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038334288] [2024-06-27 17:50:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:33,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:33,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:33,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038334288] [2024-06-27 17:50:33,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038334288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:33,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:33,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:33,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561876395] [2024-06-27 17:50:33,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:33,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:33,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:33,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:33,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:33,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:33,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 321 transitions, 4401 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:33,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:33,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:34,394 INFO L124 PetriNetUnfolderBase]: 3601/6208 cut-off events. [2024-06-27 17:50:34,394 INFO L125 PetriNetUnfolderBase]: For 197832/197862 co-relation queries the response was YES. [2024-06-27 17:50:34,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35522 conditions, 6208 events. 3601/6208 cut-off events. For 197832/197862 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 43795 event pairs, 925 based on Foata normal form. 2/5954 useless extension candidates. Maximal degree in co-relation 35409. Up to 5331 conditions per place. [2024-06-27 17:50:34,445 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 311 selfloop transitions, 33 changer transitions 0/359 dead transitions. [2024-06-27 17:50:34,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 359 transitions, 5375 flow [2024-06-27 17:50:34,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:34,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:34,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-27 17:50:34,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-06-27 17:50:34,446 INFO L175 Difference]: Start difference. First operand has 255 places, 321 transitions, 4401 flow. Second operand 7 states and 201 transitions. [2024-06-27 17:50:34,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 359 transitions, 5375 flow [2024-06-27 17:50:34,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 359 transitions, 5287 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:34,945 INFO L231 Difference]: Finished difference. Result has 258 places, 326 transitions, 4478 flow [2024-06-27 17:50:34,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4313, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4478, PETRI_PLACES=258, PETRI_TRANSITIONS=326} [2024-06-27 17:50:34,946 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 208 predicate places. [2024-06-27 17:50:34,946 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 326 transitions, 4478 flow [2024-06-27 17:50:34,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:34,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:34,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 17:50:34,946 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:34,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:34,946 INFO L85 PathProgramCache]: Analyzing trace with hash 2111902328, now seen corresponding path program 2 times [2024-06-27 17:50:34,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:34,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88424689] [2024-06-27 17:50:34,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:34,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:35,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:35,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88424689] [2024-06-27 17:50:35,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88424689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:35,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:35,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:35,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752436524] [2024-06-27 17:50:35,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:35,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:35,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:35,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:35,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:35,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:35,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 326 transitions, 4478 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:35,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:35,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:35,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:35,850 INFO L124 PetriNetUnfolderBase]: 3622/6160 cut-off events. [2024-06-27 17:50:35,850 INFO L125 PetriNetUnfolderBase]: For 204550/204580 co-relation queries the response was YES. [2024-06-27 17:50:35,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36067 conditions, 6160 events. 3622/6160 cut-off events. For 204550/204580 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 43054 event pairs, 1090 based on Foata normal form. 2/5904 useless extension candidates. Maximal degree in co-relation 35952. Up to 5441 conditions per place. [2024-06-27 17:50:35,911 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 311 selfloop transitions, 28 changer transitions 0/354 dead transitions. [2024-06-27 17:50:35,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 354 transitions, 5262 flow [2024-06-27 17:50:35,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:35,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-27 17:50:35,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024844720496895 [2024-06-27 17:50:35,912 INFO L175 Difference]: Start difference. First operand has 258 places, 326 transitions, 4478 flow. Second operand 7 states and 194 transitions. [2024-06-27 17:50:35,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 354 transitions, 5262 flow [2024-06-27 17:50:36,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 354 transitions, 5170 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:36,412 INFO L231 Difference]: Finished difference. Result has 262 places, 328 transitions, 4489 flow [2024-06-27 17:50:36,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4398, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4489, PETRI_PLACES=262, PETRI_TRANSITIONS=328} [2024-06-27 17:50:36,412 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 212 predicate places. [2024-06-27 17:50:36,412 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 328 transitions, 4489 flow [2024-06-27 17:50:36,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:36,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:36,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:36,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 17:50:36,413 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:36,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:36,413 INFO L85 PathProgramCache]: Analyzing trace with hash -53212148, now seen corresponding path program 3 times [2024-06-27 17:50:36,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:36,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684752517] [2024-06-27 17:50:36,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:36,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:36,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:36,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684752517] [2024-06-27 17:50:36,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684752517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:36,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:36,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:36,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176970046] [2024-06-27 17:50:36,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:36,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:36,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:36,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:36,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:36,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:36,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 328 transitions, 4489 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:36,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:36,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:36,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:37,319 INFO L124 PetriNetUnfolderBase]: 3647/6217 cut-off events. [2024-06-27 17:50:37,319 INFO L125 PetriNetUnfolderBase]: For 213315/213393 co-relation queries the response was YES. [2024-06-27 17:50:37,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36351 conditions, 6217 events. 3647/6217 cut-off events. For 213315/213393 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 43735 event pairs, 1125 based on Foata normal form. 34/6002 useless extension candidates. Maximal degree in co-relation 36234. Up to 5216 conditions per place. [2024-06-27 17:50:37,380 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 251 selfloop transitions, 102 changer transitions 0/368 dead transitions. [2024-06-27 17:50:37,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 368 transitions, 5979 flow [2024-06-27 17:50:37,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:37,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 17:50:37,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-06-27 17:50:37,381 INFO L175 Difference]: Start difference. First operand has 262 places, 328 transitions, 4489 flow. Second operand 7 states and 205 transitions. [2024-06-27 17:50:37,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 368 transitions, 5979 flow [2024-06-27 17:50:37,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 368 transitions, 5910 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:37,992 INFO L231 Difference]: Finished difference. Result has 264 places, 341 transitions, 4860 flow [2024-06-27 17:50:37,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4420, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4860, PETRI_PLACES=264, PETRI_TRANSITIONS=341} [2024-06-27 17:50:37,993 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 214 predicate places. [2024-06-27 17:50:37,993 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 341 transitions, 4860 flow [2024-06-27 17:50:37,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:37,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:37,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:37,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 17:50:37,993 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:37,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:37,993 INFO L85 PathProgramCache]: Analyzing trace with hash 122902506, now seen corresponding path program 4 times [2024-06-27 17:50:37,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:37,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074555267] [2024-06-27 17:50:37,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:37,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:38,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:38,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074555267] [2024-06-27 17:50:38,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074555267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:38,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:38,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:38,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813541836] [2024-06-27 17:50:38,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:38,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:38,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:38,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:38,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:38,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:38,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 341 transitions, 4860 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:38,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:38,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:38,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:38,947 INFO L124 PetriNetUnfolderBase]: 3653/6227 cut-off events. [2024-06-27 17:50:38,947 INFO L125 PetriNetUnfolderBase]: For 220831/220914 co-relation queries the response was YES. [2024-06-27 17:50:38,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36876 conditions, 6227 events. 3653/6227 cut-off events. For 220831/220914 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 43782 event pairs, 1125 based on Foata normal form. 38/6015 useless extension candidates. Maximal degree in co-relation 36758. Up to 5221 conditions per place. [2024-06-27 17:50:39,009 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 248 selfloop transitions, 104 changer transitions 0/367 dead transitions. [2024-06-27 17:50:39,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 367 transitions, 6058 flow [2024-06-27 17:50:39,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:39,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-27 17:50:39,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-06-27 17:50:39,010 INFO L175 Difference]: Start difference. First operand has 264 places, 341 transitions, 4860 flow. Second operand 7 states and 201 transitions. [2024-06-27 17:50:39,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 367 transitions, 6058 flow [2024-06-27 17:50:39,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 367 transitions, 5935 flow, removed 47 selfloop flow, removed 1 redundant places. [2024-06-27 17:50:39,556 INFO L231 Difference]: Finished difference. Result has 270 places, 344 transitions, 5011 flow [2024-06-27 17:50:39,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4759, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5011, PETRI_PLACES=270, PETRI_TRANSITIONS=344} [2024-06-27 17:50:39,556 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 220 predicate places. [2024-06-27 17:50:39,557 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 344 transitions, 5011 flow [2024-06-27 17:50:39,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:39,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:39,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:39,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 17:50:39,557 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:39,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:39,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1319012330, now seen corresponding path program 5 times [2024-06-27 17:50:39,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:39,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122965289] [2024-06-27 17:50:39,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:39,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:39,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:39,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122965289] [2024-06-27 17:50:39,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122965289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:39,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:39,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:39,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400004076] [2024-06-27 17:50:39,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:39,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:39,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:39,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:39,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:39,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:39,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 344 transitions, 5011 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:39,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:39,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:39,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:40,523 INFO L124 PetriNetUnfolderBase]: 3687/6278 cut-off events. [2024-06-27 17:50:40,523 INFO L125 PetriNetUnfolderBase]: For 233759/233841 co-relation queries the response was YES. [2024-06-27 17:50:40,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37663 conditions, 6278 events. 3687/6278 cut-off events. For 233759/233841 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 44111 event pairs, 1125 based on Foata normal form. 38/6061 useless extension candidates. Maximal degree in co-relation 37542. Up to 5251 conditions per place. [2024-06-27 17:50:40,587 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 246 selfloop transitions, 114 changer transitions 0/375 dead transitions. [2024-06-27 17:50:40,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 375 transitions, 6470 flow [2024-06-27 17:50:40,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:40,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:40,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 17:50:40,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6211180124223602 [2024-06-27 17:50:40,587 INFO L175 Difference]: Start difference. First operand has 270 places, 344 transitions, 5011 flow. Second operand 7 states and 200 transitions. [2024-06-27 17:50:40,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 375 transitions, 6470 flow [2024-06-27 17:50:41,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 375 transitions, 6258 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:41,186 INFO L231 Difference]: Finished difference. Result has 273 places, 354 transitions, 5210 flow [2024-06-27 17:50:41,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4813, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5210, PETRI_PLACES=273, PETRI_TRANSITIONS=354} [2024-06-27 17:50:41,187 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 223 predicate places. [2024-06-27 17:50:41,187 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 354 transitions, 5210 flow [2024-06-27 17:50:41,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:41,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:41,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:41,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 17:50:41,187 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:41,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:41,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1950534318, now seen corresponding path program 6 times [2024-06-27 17:50:41,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:41,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175266837] [2024-06-27 17:50:41,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:41,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:41,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:41,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175266837] [2024-06-27 17:50:41,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175266837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:41,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:41,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:41,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084926290] [2024-06-27 17:50:41,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:41,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:41,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:41,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:41,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:41,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:41,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 354 transitions, 5210 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:41,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:41,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:41,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:42,143 INFO L124 PetriNetUnfolderBase]: 3684/6262 cut-off events. [2024-06-27 17:50:42,143 INFO L125 PetriNetUnfolderBase]: For 235311/235341 co-relation queries the response was YES. [2024-06-27 17:50:42,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37636 conditions, 6262 events. 3684/6262 cut-off events. For 235311/235341 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 43889 event pairs, 1090 based on Foata normal form. 1/5995 useless extension candidates. Maximal degree in co-relation 37514. Up to 5534 conditions per place. [2024-06-27 17:50:42,209 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 328 selfloop transitions, 28 changer transitions 0/371 dead transitions. [2024-06-27 17:50:42,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 371 transitions, 5964 flow [2024-06-27 17:50:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:42,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:42,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-27 17:50:42,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807453416149069 [2024-06-27 17:50:42,210 INFO L175 Difference]: Start difference. First operand has 273 places, 354 transitions, 5210 flow. Second operand 7 states and 187 transitions. [2024-06-27 17:50:42,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 371 transitions, 5964 flow [2024-06-27 17:50:42,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 371 transitions, 5779 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-27 17:50:42,921 INFO L231 Difference]: Finished difference. Result has 278 places, 354 transitions, 5087 flow [2024-06-27 17:50:42,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5025, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5087, PETRI_PLACES=278, PETRI_TRANSITIONS=354} [2024-06-27 17:50:42,922 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 228 predicate places. [2024-06-27 17:50:42,922 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 354 transitions, 5087 flow [2024-06-27 17:50:42,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:42,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:42,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:42,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 17:50:42,923 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:42,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:42,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1314247754, now seen corresponding path program 3 times [2024-06-27 17:50:42,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:42,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448617722] [2024-06-27 17:50:42,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:42,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:42,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:42,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448617722] [2024-06-27 17:50:42,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448617722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:42,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:42,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:42,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978258519] [2024-06-27 17:50:42,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:42,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:42,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:42,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:42,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:43,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:43,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 354 transitions, 5087 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:43,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:43,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:43,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:43,903 INFO L124 PetriNetUnfolderBase]: 3679/6255 cut-off events. [2024-06-27 17:50:43,903 INFO L125 PetriNetUnfolderBase]: For 238218/238248 co-relation queries the response was YES. [2024-06-27 17:50:43,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37218 conditions, 6255 events. 3679/6255 cut-off events. For 238218/238248 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 43857 event pairs, 1089 based on Foata normal form. 2/5989 useless extension candidates. Maximal degree in co-relation 37095. Up to 5516 conditions per place. [2024-06-27 17:50:43,968 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 332 selfloop transitions, 27 changer transitions 0/374 dead transitions. [2024-06-27 17:50:43,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 374 transitions, 5857 flow [2024-06-27 17:50:43,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:43,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:43,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-27 17:50:43,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-06-27 17:50:43,969 INFO L175 Difference]: Start difference. First operand has 278 places, 354 transitions, 5087 flow. Second operand 7 states and 189 transitions. [2024-06-27 17:50:43,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 374 transitions, 5857 flow [2024-06-27 17:50:44,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 374 transitions, 5779 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:44,707 INFO L231 Difference]: Finished difference. Result has 280 places, 354 transitions, 5068 flow [2024-06-27 17:50:44,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5009, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5068, PETRI_PLACES=280, PETRI_TRANSITIONS=354} [2024-06-27 17:50:44,707 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 230 predicate places. [2024-06-27 17:50:44,707 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 354 transitions, 5068 flow [2024-06-27 17:50:44,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:44,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:44,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:44,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 17:50:44,708 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:44,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:44,708 INFO L85 PathProgramCache]: Analyzing trace with hash 122915185, now seen corresponding path program 1 times [2024-06-27 17:50:44,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:44,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024966851] [2024-06-27 17:50:44,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:44,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:44,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:44,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024966851] [2024-06-27 17:50:44,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024966851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:44,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:44,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:44,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780910742] [2024-06-27 17:50:44,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:44,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:44,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:44,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:44,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:44,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:44,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 354 transitions, 5068 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:44,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:44,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:44,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:45,759 INFO L124 PetriNetUnfolderBase]: 3686/6280 cut-off events. [2024-06-27 17:50:45,759 INFO L125 PetriNetUnfolderBase]: For 243232/243304 co-relation queries the response was YES. [2024-06-27 17:50:45,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37364 conditions, 6280 events. 3686/6280 cut-off events. For 243232/243304 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 44207 event pairs, 1128 based on Foata normal form. 23/6042 useless extension candidates. Maximal degree in co-relation 37240. Up to 5296 conditions per place. [2024-06-27 17:50:45,820 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 217 selfloop transitions, 148 changer transitions 0/380 dead transitions. [2024-06-27 17:50:45,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 380 transitions, 6176 flow [2024-06-27 17:50:45,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:45,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-27 17:50:45,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005434782608695 [2024-06-27 17:50:45,821 INFO L175 Difference]: Start difference. First operand has 280 places, 354 transitions, 5068 flow. Second operand 8 states and 221 transitions. [2024-06-27 17:50:45,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 380 transitions, 6176 flow [2024-06-27 17:50:46,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 380 transitions, 6137 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:46,495 INFO L231 Difference]: Finished difference. Result has 285 places, 357 transitions, 5385 flow [2024-06-27 17:50:46,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5029, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5385, PETRI_PLACES=285, PETRI_TRANSITIONS=357} [2024-06-27 17:50:46,496 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 235 predicate places. [2024-06-27 17:50:46,496 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 357 transitions, 5385 flow [2024-06-27 17:50:46,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:46,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:46,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:46,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 17:50:46,496 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:46,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:46,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1319020983, now seen corresponding path program 2 times [2024-06-27 17:50:46,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:46,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506036668] [2024-06-27 17:50:46,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:46,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:46,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:46,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506036668] [2024-06-27 17:50:46,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506036668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:46,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:46,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:46,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962667211] [2024-06-27 17:50:46,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:46,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:46,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:46,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:46,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:46,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:46,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 357 transitions, 5385 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:46,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:46,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:46,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:47,538 INFO L124 PetriNetUnfolderBase]: 3693/6288 cut-off events. [2024-06-27 17:50:47,538 INFO L125 PetriNetUnfolderBase]: For 251498/251570 co-relation queries the response was YES. [2024-06-27 17:50:47,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37925 conditions, 6288 events. 3693/6288 cut-off events. For 251498/251570 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 44230 event pairs, 1127 based on Foata normal form. 23/6047 useless extension candidates. Maximal degree in co-relation 37800. Up to 5304 conditions per place. [2024-06-27 17:50:47,604 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 217 selfloop transitions, 151 changer transitions 0/383 dead transitions. [2024-06-27 17:50:47,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 383 transitions, 6509 flow [2024-06-27 17:50:47,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:47,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:47,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-27 17:50:47,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6059782608695652 [2024-06-27 17:50:47,605 INFO L175 Difference]: Start difference. First operand has 285 places, 357 transitions, 5385 flow. Second operand 8 states and 223 transitions. [2024-06-27 17:50:47,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 383 transitions, 6509 flow [2024-06-27 17:50:48,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 383 transitions, 6257 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:48,390 INFO L231 Difference]: Finished difference. Result has 288 places, 360 transitions, 5501 flow [2024-06-27 17:50:48,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5136, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5501, PETRI_PLACES=288, PETRI_TRANSITIONS=360} [2024-06-27 17:50:48,390 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 238 predicate places. [2024-06-27 17:50:48,390 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 360 transitions, 5501 flow [2024-06-27 17:50:48,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:48,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:48,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:48,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 17:50:48,391 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:48,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:48,391 INFO L85 PathProgramCache]: Analyzing trace with hash 564367211, now seen corresponding path program 3 times [2024-06-27 17:50:48,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:48,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529684291] [2024-06-27 17:50:48,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:48,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:48,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:48,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529684291] [2024-06-27 17:50:48,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529684291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:48,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:48,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:48,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573803250] [2024-06-27 17:50:48,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:48,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:48,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:48,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:48,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:48,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:48,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 360 transitions, 5501 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:48,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:48,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:48,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:49,454 INFO L124 PetriNetUnfolderBase]: 3710/6312 cut-off events. [2024-06-27 17:50:49,454 INFO L125 PetriNetUnfolderBase]: For 261952/262022 co-relation queries the response was YES. [2024-06-27 17:50:49,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38306 conditions, 6312 events. 3710/6312 cut-off events. For 261952/262022 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 44282 event pairs, 1124 based on Foata normal form. 23/6064 useless extension candidates. Maximal degree in co-relation 38179. Up to 5323 conditions per place. [2024-06-27 17:50:49,514 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 219 selfloop transitions, 155 changer transitions 0/389 dead transitions. [2024-06-27 17:50:49,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 389 transitions, 6981 flow [2024-06-27 17:50:49,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:49,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:49,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-27 17:50:49,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2024-06-27 17:50:49,515 INFO L175 Difference]: Start difference. First operand has 288 places, 360 transitions, 5501 flow. Second operand 9 states and 246 transitions. [2024-06-27 17:50:49,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 389 transitions, 6981 flow [2024-06-27 17:50:50,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 389 transitions, 6631 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:50,332 INFO L231 Difference]: Finished difference. Result has 291 places, 366 transitions, 5593 flow [2024-06-27 17:50:50,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5163, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5593, PETRI_PLACES=291, PETRI_TRANSITIONS=366} [2024-06-27 17:50:50,333 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 241 predicate places. [2024-06-27 17:50:50,333 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 366 transitions, 5593 flow [2024-06-27 17:50:50,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:50,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:50,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:50,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 17:50:50,333 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:50,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:50,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1319025009, now seen corresponding path program 4 times [2024-06-27 17:50:50,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:50,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752889704] [2024-06-27 17:50:50,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:50,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:50,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:50,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752889704] [2024-06-27 17:50:50,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752889704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:50,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:50,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:50,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208707138] [2024-06-27 17:50:50,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:50,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:50,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:50,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:50,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:50,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:50,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 366 transitions, 5593 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:50,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:50,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:50,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:51,356 INFO L124 PetriNetUnfolderBase]: 3717/6329 cut-off events. [2024-06-27 17:50:51,356 INFO L125 PetriNetUnfolderBase]: For 268504/268580 co-relation queries the response was YES. [2024-06-27 17:50:51,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38458 conditions, 6329 events. 3717/6329 cut-off events. For 268504/268580 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 44560 event pairs, 1132 based on Foata normal form. 24/6091 useless extension candidates. Maximal degree in co-relation 38330. Up to 5331 conditions per place. [2024-06-27 17:50:51,421 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 216 selfloop transitions, 158 changer transitions 0/389 dead transitions. [2024-06-27 17:50:51,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 389 transitions, 6732 flow [2024-06-27 17:50:51,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:51,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:51,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-27 17:50:51,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-06-27 17:50:51,422 INFO L175 Difference]: Start difference. First operand has 291 places, 366 transitions, 5593 flow. Second operand 8 states and 220 transitions. [2024-06-27 17:50:51,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 389 transitions, 6732 flow [2024-06-27 17:50:52,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 389 transitions, 6211 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:52,225 INFO L231 Difference]: Finished difference. Result has 292 places, 369 transitions, 5457 flow [2024-06-27 17:50:52,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5096, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5457, PETRI_PLACES=292, PETRI_TRANSITIONS=369} [2024-06-27 17:50:52,225 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 242 predicate places. [2024-06-27 17:50:52,225 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 369 transitions, 5457 flow [2024-06-27 17:50:52,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:52,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:52,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:52,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 17:50:52,226 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:52,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:52,226 INFO L85 PathProgramCache]: Analyzing trace with hash 370031045, now seen corresponding path program 5 times [2024-06-27 17:50:52,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:52,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247126590] [2024-06-27 17:50:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:52,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:52,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:52,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247126590] [2024-06-27 17:50:52,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247126590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:52,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:52,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:52,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868263975] [2024-06-27 17:50:52,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:52,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:52,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:52,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:52,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:52,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:52,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 369 transitions, 5457 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:52,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:52,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:52,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:53,316 INFO L124 PetriNetUnfolderBase]: 3724/6337 cut-off events. [2024-06-27 17:50:53,316 INFO L125 PetriNetUnfolderBase]: For 272715/272793 co-relation queries the response was YES. [2024-06-27 17:50:53,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38163 conditions, 6337 events. 3724/6337 cut-off events. For 272715/272793 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 44579 event pairs, 1130 based on Foata normal form. 24/6092 useless extension candidates. Maximal degree in co-relation 38035. Up to 5339 conditions per place. [2024-06-27 17:50:53,373 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 216 selfloop transitions, 163 changer transitions 0/394 dead transitions. [2024-06-27 17:50:53,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 394 transitions, 6738 flow [2024-06-27 17:50:53,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:53,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:53,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-27 17:50:53,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-06-27 17:50:53,374 INFO L175 Difference]: Start difference. First operand has 292 places, 369 transitions, 5457 flow. Second operand 9 states and 243 transitions. [2024-06-27 17:50:53,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 394 transitions, 6738 flow [2024-06-27 17:50:54,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 394 transitions, 6484 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:54,199 INFO L231 Difference]: Finished difference. Result has 296 places, 372 transitions, 5580 flow [2024-06-27 17:50:54,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5206, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5580, PETRI_PLACES=296, PETRI_TRANSITIONS=372} [2024-06-27 17:50:54,200 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 246 predicate places. [2024-06-27 17:50:54,200 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 372 transitions, 5580 flow [2024-06-27 17:50:54,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:54,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:54,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:54,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 17:50:54,201 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:54,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:54,201 INFO L85 PathProgramCache]: Analyzing trace with hash 19894594, now seen corresponding path program 7 times [2024-06-27 17:50:54,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:54,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125783818] [2024-06-27 17:50:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:54,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:54,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:54,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125783818] [2024-06-27 17:50:54,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125783818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:54,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:54,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:54,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738760626] [2024-06-27 17:50:54,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:54,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:54,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:54,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:54,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:54,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:54,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 372 transitions, 5580 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:54,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:54,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:54,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:55,207 INFO L124 PetriNetUnfolderBase]: 3737/6335 cut-off events. [2024-06-27 17:50:55,207 INFO L125 PetriNetUnfolderBase]: For 282741/282786 co-relation queries the response was YES. [2024-06-27 17:50:55,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38395 conditions, 6335 events. 3737/6335 cut-off events. For 282741/282786 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 44409 event pairs, 1105 based on Foata normal form. 16/6069 useless extension candidates. Maximal degree in co-relation 38265. Up to 5313 conditions per place. [2024-06-27 17:50:55,274 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 277 selfloop transitions, 106 changer transitions 0/398 dead transitions. [2024-06-27 17:50:55,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 398 transitions, 6758 flow [2024-06-27 17:50:55,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:55,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:55,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 17:50:55,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6211180124223602 [2024-06-27 17:50:55,275 INFO L175 Difference]: Start difference. First operand has 296 places, 372 transitions, 5580 flow. Second operand 7 states and 200 transitions. [2024-06-27 17:50:55,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 398 transitions, 6758 flow [2024-06-27 17:50:56,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 398 transitions, 6416 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:56,255 INFO L231 Difference]: Finished difference. Result has 296 places, 376 transitions, 5527 flow [2024-06-27 17:50:56,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5238, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5527, PETRI_PLACES=296, PETRI_TRANSITIONS=376} [2024-06-27 17:50:56,255 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 246 predicate places. [2024-06-27 17:50:56,255 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 376 transitions, 5527 flow [2024-06-27 17:50:56,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:56,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:56,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:56,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 17:50:56,256 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:56,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:56,256 INFO L85 PathProgramCache]: Analyzing trace with hash -762444574, now seen corresponding path program 8 times [2024-06-27 17:50:56,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:56,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476197618] [2024-06-27 17:50:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:56,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:56,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:56,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476197618] [2024-06-27 17:50:56,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476197618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:56,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:56,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:56,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798778744] [2024-06-27 17:50:56,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:56,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:56,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:56,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:56,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:56,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:56,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 376 transitions, 5527 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:56,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:56,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:56,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:57,311 INFO L124 PetriNetUnfolderBase]: 3731/6329 cut-off events. [2024-06-27 17:50:57,311 INFO L125 PetriNetUnfolderBase]: For 283240/283282 co-relation queries the response was YES. [2024-06-27 17:50:57,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38134 conditions, 6329 events. 3731/6329 cut-off events. For 283240/283282 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 44382 event pairs, 1105 based on Foata normal form. 13/6060 useless extension candidates. Maximal degree in co-relation 38003. Up to 5308 conditions per place. [2024-06-27 17:50:57,368 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 277 selfloop transitions, 103 changer transitions 0/395 dead transitions. [2024-06-27 17:50:57,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 395 transitions, 6625 flow [2024-06-27 17:50:57,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:57,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:57,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-27 17:50:57,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149068322981367 [2024-06-27 17:50:57,369 INFO L175 Difference]: Start difference. First operand has 296 places, 376 transitions, 5527 flow. Second operand 7 states and 198 transitions. [2024-06-27 17:50:57,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 395 transitions, 6625 flow [2024-06-27 17:50:58,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 395 transitions, 6331 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:58,266 INFO L231 Difference]: Finished difference. Result has 299 places, 376 transitions, 5446 flow [2024-06-27 17:50:58,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5233, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5446, PETRI_PLACES=299, PETRI_TRANSITIONS=376} [2024-06-27 17:50:58,267 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 249 predicate places. [2024-06-27 17:50:58,267 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 376 transitions, 5446 flow [2024-06-27 17:50:58,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:58,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:58,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:58,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 17:50:58,267 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:58,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:58,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1000743004, now seen corresponding path program 9 times [2024-06-27 17:50:58,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:58,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526380278] [2024-06-27 17:50:58,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:58,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:58,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:58,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526380278] [2024-06-27 17:50:58,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526380278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:58,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:58,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:58,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026048948] [2024-06-27 17:50:58,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:58,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:58,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:58,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:58,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:58,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:50:58,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 376 transitions, 5446 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:58,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:58,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:50:58,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:59,337 INFO L124 PetriNetUnfolderBase]: 3780/6413 cut-off events. [2024-06-27 17:50:59,337 INFO L125 PetriNetUnfolderBase]: For 300375/300405 co-relation queries the response was YES. [2024-06-27 17:50:59,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38708 conditions, 6413 events. 3780/6413 cut-off events. For 300375/300405 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 44998 event pairs, 1090 based on Foata normal form. 4/6121 useless extension candidates. Maximal degree in co-relation 38576. Up to 5631 conditions per place. [2024-06-27 17:50:59,408 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 342 selfloop transitions, 49 changer transitions 0/406 dead transitions. [2024-06-27 17:50:59,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 406 transitions, 6650 flow [2024-06-27 17:50:59,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:59,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:59,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-27 17:50:59,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5842391304347826 [2024-06-27 17:50:59,409 INFO L175 Difference]: Start difference. First operand has 299 places, 376 transitions, 5446 flow. Second operand 8 states and 215 transitions. [2024-06-27 17:50:59,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 406 transitions, 6650 flow [2024-06-27 17:51:00,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 406 transitions, 6428 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:00,455 INFO L231 Difference]: Finished difference. Result has 303 places, 390 transitions, 5610 flow [2024-06-27 17:51:00,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5234, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5610, PETRI_PLACES=303, PETRI_TRANSITIONS=390} [2024-06-27 17:51:00,455 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 253 predicate places. [2024-06-27 17:51:00,455 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 390 transitions, 5610 flow [2024-06-27 17:51:00,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:00,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:00,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:00,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 17:51:00,456 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:00,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:00,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1704355928, now seen corresponding path program 10 times [2024-06-27 17:51:00,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:00,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908763115] [2024-06-27 17:51:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:00,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:00,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:00,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908763115] [2024-06-27 17:51:00,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908763115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:00,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:00,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:00,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401246401] [2024-06-27 17:51:00,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:00,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:00,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:00,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:00,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:00,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:00,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 390 transitions, 5610 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:00,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:00,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:00,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:01,630 INFO L124 PetriNetUnfolderBase]: 3846/6505 cut-off events. [2024-06-27 17:51:01,630 INFO L125 PetriNetUnfolderBase]: For 316938/316999 co-relation queries the response was YES. [2024-06-27 17:51:01,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39929 conditions, 6505 events. 3846/6505 cut-off events. For 316938/316999 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 45531 event pairs, 1098 based on Foata normal form. 26/6220 useless extension candidates. Maximal degree in co-relation 39795. Up to 5468 conditions per place. [2024-06-27 17:51:01,700 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 293 selfloop transitions, 130 changer transitions 0/438 dead transitions. [2024-06-27 17:51:01,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 438 transitions, 7333 flow [2024-06-27 17:51:01,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:01,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-27 17:51:01,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583850931677019 [2024-06-27 17:51:01,702 INFO L175 Difference]: Start difference. First operand has 303 places, 390 transitions, 5610 flow. Second operand 7 states and 212 transitions. [2024-06-27 17:51:01,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 438 transitions, 7333 flow [2024-06-27 17:51:02,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 438 transitions, 7186 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:02,889 INFO L231 Difference]: Finished difference. Result has 308 places, 409 transitions, 6235 flow [2024-06-27 17:51:02,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5463, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6235, PETRI_PLACES=308, PETRI_TRANSITIONS=409} [2024-06-27 17:51:02,890 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 258 predicate places. [2024-06-27 17:51:02,890 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 409 transitions, 6235 flow [2024-06-27 17:51:02,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:02,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:02,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:02,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 17:51:02,890 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:02,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:02,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1704178298, now seen corresponding path program 11 times [2024-06-27 17:51:02,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:02,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575310959] [2024-06-27 17:51:02,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:02,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:02,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:02,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:02,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575310959] [2024-06-27 17:51:02,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575310959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:02,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:02,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:02,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749407003] [2024-06-27 17:51:02,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:02,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:02,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:02,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:02,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:03,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:03,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 409 transitions, 6235 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:03,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:03,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:03,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:04,056 INFO L124 PetriNetUnfolderBase]: 3840/6502 cut-off events. [2024-06-27 17:51:04,056 INFO L125 PetriNetUnfolderBase]: For 321456/321486 co-relation queries the response was YES. [2024-06-27 17:51:04,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40607 conditions, 6502 events. 3840/6502 cut-off events. For 321456/321486 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 45519 event pairs, 1090 based on Foata normal form. 2/6192 useless extension candidates. Maximal degree in co-relation 40469. Up to 5722 conditions per place. [2024-06-27 17:51:04,128 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 384 selfloop transitions, 35 changer transitions 0/434 dead transitions. [2024-06-27 17:51:04,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 434 transitions, 7137 flow [2024-06-27 17:51:04,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:04,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:04,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 17:51:04,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-06-27 17:51:04,129 INFO L175 Difference]: Start difference. First operand has 308 places, 409 transitions, 6235 flow. Second operand 6 states and 178 transitions. [2024-06-27 17:51:04,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 434 transitions, 7137 flow [2024-06-27 17:51:05,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 434 transitions, 7008 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-27 17:51:05,391 INFO L231 Difference]: Finished difference. Result has 312 places, 409 transitions, 6190 flow [2024-06-27 17:51:05,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6106, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6190, PETRI_PLACES=312, PETRI_TRANSITIONS=409} [2024-06-27 17:51:05,392 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 262 predicate places. [2024-06-27 17:51:05,392 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 409 transitions, 6190 flow [2024-06-27 17:51:05,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:05,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:05,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:05,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 17:51:05,392 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:05,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:05,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2045753588, now seen corresponding path program 12 times [2024-06-27 17:51:05,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:05,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350572215] [2024-06-27 17:51:05,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:05,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:05,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:05,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350572215] [2024-06-27 17:51:05,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350572215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:05,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:05,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:05,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604057272] [2024-06-27 17:51:05,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:05,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:05,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:05,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:05,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:05,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:05,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 409 transitions, 6190 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:05,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:05,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:05,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:06,517 INFO L124 PetriNetUnfolderBase]: 3828/6488 cut-off events. [2024-06-27 17:51:06,517 INFO L125 PetriNetUnfolderBase]: For 314724/314754 co-relation queries the response was YES. [2024-06-27 17:51:06,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40133 conditions, 6488 events. 3828/6488 cut-off events. For 314724/314754 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 45534 event pairs, 1090 based on Foata normal form. 4/6180 useless extension candidates. Maximal degree in co-relation 39994. Up to 5454 conditions per place. [2024-06-27 17:51:06,591 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 299 selfloop transitions, 126 changer transitions 0/440 dead transitions. [2024-06-27 17:51:06,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 440 transitions, 7270 flow [2024-06-27 17:51:06,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:06,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:06,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 17:51:06,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-27 17:51:06,592 INFO L175 Difference]: Start difference. First operand has 312 places, 409 transitions, 6190 flow. Second operand 8 states and 236 transitions. [2024-06-27 17:51:06,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 440 transitions, 7270 flow [2024-06-27 17:51:07,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 440 transitions, 7140 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:07,758 INFO L231 Difference]: Finished difference. Result has 315 places, 409 transitions, 6339 flow [2024-06-27 17:51:07,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6060, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6339, PETRI_PLACES=315, PETRI_TRANSITIONS=409} [2024-06-27 17:51:07,758 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 265 predicate places. [2024-06-27 17:51:07,758 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 409 transitions, 6339 flow [2024-06-27 17:51:07,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:07,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:07,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:07,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 17:51:07,758 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:07,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:07,759 INFO L85 PathProgramCache]: Analyzing trace with hash -762431895, now seen corresponding path program 6 times [2024-06-27 17:51:07,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:07,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143891354] [2024-06-27 17:51:07,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:07,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:07,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:07,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143891354] [2024-06-27 17:51:07,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143891354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:07,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:07,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:07,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552651126] [2024-06-27 17:51:07,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:07,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:07,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:07,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:07,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:07,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:07,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 409 transitions, 6339 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:07,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:07,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:07,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:08,852 INFO L124 PetriNetUnfolderBase]: 3825/6473 cut-off events. [2024-06-27 17:51:08,852 INFO L125 PetriNetUnfolderBase]: For 311802/311832 co-relation queries the response was YES. [2024-06-27 17:51:08,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40487 conditions, 6473 events. 3825/6473 cut-off events. For 311802/311832 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 45307 event pairs, 1102 based on Foata normal form. 1/6160 useless extension candidates. Maximal degree in co-relation 40348. Up to 5469 conditions per place. [2024-06-27 17:51:08,926 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 261 selfloop transitions, 153 changer transitions 0/429 dead transitions. [2024-06-27 17:51:08,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 429 transitions, 7523 flow [2024-06-27 17:51:08,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:08,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:08,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-27 17:51:08,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595108695652174 [2024-06-27 17:51:08,927 INFO L175 Difference]: Start difference. First operand has 315 places, 409 transitions, 6339 flow. Second operand 8 states and 219 transitions. [2024-06-27 17:51:08,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 429 transitions, 7523 flow [2024-06-27 17:51:09,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 429 transitions, 7186 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:09,940 INFO L231 Difference]: Finished difference. Result has 315 places, 409 transitions, 6318 flow [2024-06-27 17:51:09,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6006, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6318, PETRI_PLACES=315, PETRI_TRANSITIONS=409} [2024-06-27 17:51:09,941 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 265 predicate places. [2024-06-27 17:51:09,941 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 409 transitions, 6318 flow [2024-06-27 17:51:09,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:09,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:09,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:09,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 17:51:09,942 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:09,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:09,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1216367175, now seen corresponding path program 7 times [2024-06-27 17:51:09,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:09,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555857910] [2024-06-27 17:51:09,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:09,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:10,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:10,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555857910] [2024-06-27 17:51:10,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555857910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:10,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:10,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:10,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126155872] [2024-06-27 17:51:10,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:10,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:10,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:10,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:10,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:10,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:10,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 409 transitions, 6318 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:10,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:10,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:10,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:11,013 INFO L124 PetriNetUnfolderBase]: 3832/6484 cut-off events. [2024-06-27 17:51:11,014 INFO L125 PetriNetUnfolderBase]: For 311665/311695 co-relation queries the response was YES. [2024-06-27 17:51:11,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40516 conditions, 6484 events. 3832/6484 cut-off events. For 311665/311695 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 45398 event pairs, 1102 based on Foata normal form. 1/6169 useless extension candidates. Maximal degree in co-relation 40377. Up to 5477 conditions per place. [2024-06-27 17:51:11,087 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 252 selfloop transitions, 166 changer transitions 0/433 dead transitions. [2024-06-27 17:51:11,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 433 transitions, 7732 flow [2024-06-27 17:51:11,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:11,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:11,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-27 17:51:11,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005434782608695 [2024-06-27 17:51:11,088 INFO L175 Difference]: Start difference. First operand has 315 places, 409 transitions, 6318 flow. Second operand 8 states and 221 transitions. [2024-06-27 17:51:11,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 433 transitions, 7732 flow [2024-06-27 17:51:12,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 433 transitions, 7514 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:12,526 INFO L231 Difference]: Finished difference. Result has 317 places, 412 transitions, 6504 flow [2024-06-27 17:51:12,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6106, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6504, PETRI_PLACES=317, PETRI_TRANSITIONS=412} [2024-06-27 17:51:12,527 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 267 predicate places. [2024-06-27 17:51:12,527 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 412 transitions, 6504 flow [2024-06-27 17:51:12,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:12,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:12,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:12,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 17:51:12,528 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:12,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:12,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1847405477, now seen corresponding path program 8 times [2024-06-27 17:51:12,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:12,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546157314] [2024-06-27 17:51:12,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:12,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:12,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:12,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546157314] [2024-06-27 17:51:12,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546157314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:12,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:12,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:12,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220495062] [2024-06-27 17:51:12,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:12,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:12,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:12,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:12,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:12,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:12,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 412 transitions, 6504 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:12,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:12,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:12,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:13,641 INFO L124 PetriNetUnfolderBase]: 3829/6480 cut-off events. [2024-06-27 17:51:13,641 INFO L125 PetriNetUnfolderBase]: For 316905/316935 co-relation queries the response was YES. [2024-06-27 17:51:13,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40567 conditions, 6480 events. 3829/6480 cut-off events. For 316905/316935 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 45379 event pairs, 1102 based on Foata normal form. 1/6165 useless extension candidates. Maximal degree in co-relation 40427. Up to 5474 conditions per place. [2024-06-27 17:51:13,715 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 261 selfloop transitions, 156 changer transitions 0/432 dead transitions. [2024-06-27 17:51:13,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 432 transitions, 7698 flow [2024-06-27 17:51:13,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:13,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-27 17:51:13,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-06-27 17:51:13,716 INFO L175 Difference]: Start difference. First operand has 317 places, 412 transitions, 6504 flow. Second operand 8 states and 220 transitions. [2024-06-27 17:51:13,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 432 transitions, 7698 flow [2024-06-27 17:51:14,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 432 transitions, 7166 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:14,999 INFO L231 Difference]: Finished difference. Result has 317 places, 412 transitions, 6290 flow [2024-06-27 17:51:15,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5972, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6290, PETRI_PLACES=317, PETRI_TRANSITIONS=412} [2024-06-27 17:51:15,000 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 267 predicate places. [2024-06-27 17:51:15,000 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 412 transitions, 6290 flow [2024-06-27 17:51:15,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:15,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:15,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:15,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 17:51:15,000 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:15,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:15,001 INFO L85 PathProgramCache]: Analyzing trace with hash 547023647, now seen corresponding path program 9 times [2024-06-27 17:51:15,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:15,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125310674] [2024-06-27 17:51:15,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:15,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:15,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:15,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125310674] [2024-06-27 17:51:15,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125310674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:15,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:15,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:15,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466239422] [2024-06-27 17:51:15,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:15,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:15,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:15,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:15,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:15,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:15,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 412 transitions, 6290 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:15,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:15,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:15,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:16,088 INFO L124 PetriNetUnfolderBase]: 3826/6476 cut-off events. [2024-06-27 17:51:16,088 INFO L125 PetriNetUnfolderBase]: For 318592/318622 co-relation queries the response was YES. [2024-06-27 17:51:16,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40216 conditions, 6476 events. 3826/6476 cut-off events. For 318592/318622 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 45426 event pairs, 1102 based on Foata normal form. 1/6161 useless extension candidates. Maximal degree in co-relation 40076. Up to 5471 conditions per place. [2024-06-27 17:51:16,159 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 251 selfloop transitions, 166 changer transitions 0/432 dead transitions. [2024-06-27 17:51:16,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 432 transitions, 7488 flow [2024-06-27 17:51:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:16,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:16,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-27 17:51:16,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595108695652174 [2024-06-27 17:51:16,160 INFO L175 Difference]: Start difference. First operand has 317 places, 412 transitions, 6290 flow. Second operand 8 states and 219 transitions. [2024-06-27 17:51:16,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 432 transitions, 7488 flow [2024-06-27 17:51:17,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 432 transitions, 6876 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-27 17:51:17,593 INFO L231 Difference]: Finished difference. Result has 315 places, 412 transitions, 6016 flow [2024-06-27 17:51:17,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5678, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6016, PETRI_PLACES=315, PETRI_TRANSITIONS=412} [2024-06-27 17:51:17,594 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 265 predicate places. [2024-06-27 17:51:17,594 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 412 transitions, 6016 flow [2024-06-27 17:51:17,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:17,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:17,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:17,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 17:51:17,594 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:17,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:17,595 INFO L85 PathProgramCache]: Analyzing trace with hash -173917379, now seen corresponding path program 10 times [2024-06-27 17:51:17,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:17,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395643330] [2024-06-27 17:51:17,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:17,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:17,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:17,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395643330] [2024-06-27 17:51:17,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395643330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:17,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:17,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:17,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307073202] [2024-06-27 17:51:17,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:17,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:17,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:17,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:17,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:17,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:17,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 412 transitions, 6016 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:17,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:17,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:17,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:18,742 INFO L124 PetriNetUnfolderBase]: 3823/6473 cut-off events. [2024-06-27 17:51:18,742 INFO L125 PetriNetUnfolderBase]: For 315739/315769 co-relation queries the response was YES. [2024-06-27 17:51:18,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40068 conditions, 6473 events. 3823/6473 cut-off events. For 315739/315769 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 45299 event pairs, 1090 based on Foata normal form. 1/6160 useless extension candidates. Maximal degree in co-relation 39929. Up to 5690 conditions per place. [2024-06-27 17:51:18,818 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 364 selfloop transitions, 50 changer transitions 0/429 dead transitions. [2024-06-27 17:51:18,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 429 transitions, 7044 flow [2024-06-27 17:51:18,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:18,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-27 17:51:18,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5676328502415459 [2024-06-27 17:51:18,819 INFO L175 Difference]: Start difference. First operand has 315 places, 412 transitions, 6016 flow. Second operand 9 states and 235 transitions. [2024-06-27 17:51:18,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 429 transitions, 7044 flow [2024-06-27 17:51:20,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 429 transitions, 6692 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 17:51:20,101 INFO L231 Difference]: Finished difference. Result has 317 places, 412 transitions, 5770 flow [2024-06-27 17:51:20,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5664, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5770, PETRI_PLACES=317, PETRI_TRANSITIONS=412} [2024-06-27 17:51:20,101 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 267 predicate places. [2024-06-27 17:51:20,101 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 412 transitions, 5770 flow [2024-06-27 17:51:20,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:20,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:20,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:20,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 17:51:20,102 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:20,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:20,102 INFO L85 PathProgramCache]: Analyzing trace with hash -182631479, now seen corresponding path program 11 times [2024-06-27 17:51:20,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:20,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342689898] [2024-06-27 17:51:20,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:20,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:20,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:20,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342689898] [2024-06-27 17:51:20,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342689898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:20,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:20,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:20,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957751296] [2024-06-27 17:51:20,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:20,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:20,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:20,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:20,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:20,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:20,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 412 transitions, 5770 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:20,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:20,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:20,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:21,282 INFO L124 PetriNetUnfolderBase]: 3820/6467 cut-off events. [2024-06-27 17:51:21,283 INFO L125 PetriNetUnfolderBase]: For 317544/317574 co-relation queries the response was YES. [2024-06-27 17:51:21,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39652 conditions, 6467 events. 3820/6467 cut-off events. For 317544/317574 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 45177 event pairs, 1090 based on Foata normal form. 1/6154 useless extension candidates. Maximal degree in co-relation 39512. Up to 5687 conditions per place. [2024-06-27 17:51:21,354 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 363 selfloop transitions, 50 changer transitions 0/428 dead transitions. [2024-06-27 17:51:21,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 428 transitions, 6634 flow [2024-06-27 17:51:21,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:21,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 17:51:21,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-06-27 17:51:21,355 INFO L175 Difference]: Start difference. First operand has 317 places, 412 transitions, 5770 flow. Second operand 9 states and 234 transitions. [2024-06-27 17:51:21,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 428 transitions, 6634 flow [2024-06-27 17:51:22,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 428 transitions, 6500 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:22,764 INFO L231 Difference]: Finished difference. Result has 318 places, 412 transitions, 5742 flow [2024-06-27 17:51:22,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5636, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5742, PETRI_PLACES=318, PETRI_TRANSITIONS=412} [2024-06-27 17:51:22,764 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 268 predicate places. [2024-06-27 17:51:22,765 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 412 transitions, 5742 flow [2024-06-27 17:51:22,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:22,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:22,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:22,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 17:51:22,765 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:22,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:22,765 INFO L85 PathProgramCache]: Analyzing trace with hash 145288693, now seen corresponding path program 12 times [2024-06-27 17:51:22,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:22,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980883049] [2024-06-27 17:51:22,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:22,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:22,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:22,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980883049] [2024-06-27 17:51:22,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980883049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:22,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:22,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:22,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098157336] [2024-06-27 17:51:22,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:22,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:22,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:22,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:22,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:22,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:22,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 412 transitions, 5742 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:22,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:22,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:22,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:23,923 INFO L124 PetriNetUnfolderBase]: 3827/6485 cut-off events. [2024-06-27 17:51:23,923 INFO L125 PetriNetUnfolderBase]: For 324897/324958 co-relation queries the response was YES. [2024-06-27 17:51:23,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39800 conditions, 6485 events. 3827/6485 cut-off events. For 324897/324958 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 45430 event pairs, 1098 based on Foata normal form. 25/6195 useless extension candidates. Maximal degree in co-relation 39659. Up to 5557 conditions per place. [2024-06-27 17:51:23,994 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 314 selfloop transitions, 110 changer transitions 0/439 dead transitions. [2024-06-27 17:51:23,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 439 transitions, 7030 flow [2024-06-27 17:51:23,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:23,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-27 17:51:23,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5893719806763285 [2024-06-27 17:51:23,995 INFO L175 Difference]: Start difference. First operand has 318 places, 412 transitions, 5742 flow. Second operand 9 states and 244 transitions. [2024-06-27 17:51:23,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 439 transitions, 7030 flow [2024-06-27 17:51:25,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 439 transitions, 6908 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:25,221 INFO L231 Difference]: Finished difference. Result has 319 places, 415 transitions, 5900 flow [2024-06-27 17:51:25,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5620, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5900, PETRI_PLACES=319, PETRI_TRANSITIONS=415} [2024-06-27 17:51:25,221 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 269 predicate places. [2024-06-27 17:51:25,221 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 415 transitions, 5900 flow [2024-06-27 17:51:25,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:25,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:25,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:25,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 17:51:25,222 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:25,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:25,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2037026809, now seen corresponding path program 13 times [2024-06-27 17:51:25,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:25,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017838506] [2024-06-27 17:51:25,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:25,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:25,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:25,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017838506] [2024-06-27 17:51:25,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017838506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:25,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:25,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:25,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322171032] [2024-06-27 17:51:25,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:25,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:25,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:25,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:25,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:25,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:25,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 415 transitions, 5900 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:25,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:25,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:25,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:26,356 INFO L124 PetriNetUnfolderBase]: 3824/6474 cut-off events. [2024-06-27 17:51:26,356 INFO L125 PetriNetUnfolderBase]: For 328354/328384 co-relation queries the response was YES. [2024-06-27 17:51:26,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39960 conditions, 6474 events. 3824/6474 cut-off events. For 328354/328384 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 45396 event pairs, 1090 based on Foata normal form. 1/6159 useless extension candidates. Maximal degree in co-relation 39818. Up to 5554 conditions per place. [2024-06-27 17:51:26,430 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 315 selfloop transitions, 114 changer transitions 0/444 dead transitions. [2024-06-27 17:51:26,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 444 transitions, 6996 flow [2024-06-27 17:51:26,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:26,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-06-27 17:51:26,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6038647342995169 [2024-06-27 17:51:26,430 INFO L175 Difference]: Start difference. First operand has 319 places, 415 transitions, 5900 flow. Second operand 9 states and 250 transitions. [2024-06-27 17:51:26,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 444 transitions, 6996 flow [2024-06-27 17:51:27,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 444 transitions, 6681 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 17:51:27,917 INFO L231 Difference]: Finished difference. Result has 321 places, 415 transitions, 5823 flow [2024-06-27 17:51:27,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5585, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5823, PETRI_PLACES=321, PETRI_TRANSITIONS=415} [2024-06-27 17:51:27,918 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 271 predicate places. [2024-06-27 17:51:27,918 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 415 transitions, 5823 flow [2024-06-27 17:51:27,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:27,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:27,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:27,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 17:51:27,918 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:27,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:27,918 INFO L85 PathProgramCache]: Analyzing trace with hash 137937043, now seen corresponding path program 14 times [2024-06-27 17:51:27,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:27,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433391337] [2024-06-27 17:51:27,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:27,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:28,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:28,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433391337] [2024-06-27 17:51:28,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433391337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:28,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:28,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:28,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832882228] [2024-06-27 17:51:28,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:28,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:28,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:28,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:28,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:28,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:28,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 415 transitions, 5823 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:28,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:28,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:28,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:29,131 INFO L124 PetriNetUnfolderBase]: 3831/6490 cut-off events. [2024-06-27 17:51:29,131 INFO L125 PetriNetUnfolderBase]: For 334811/334872 co-relation queries the response was YES. [2024-06-27 17:51:29,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40027 conditions, 6490 events. 3831/6490 cut-off events. For 334811/334872 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 45420 event pairs, 1098 based on Foata normal form. 25/6198 useless extension candidates. Maximal degree in co-relation 39884. Up to 5562 conditions per place. [2024-06-27 17:51:29,193 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 315 selfloop transitions, 113 changer transitions 0/443 dead transitions. [2024-06-27 17:51:29,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 443 transitions, 6953 flow [2024-06-27 17:51:29,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:29,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-27 17:51:29,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-06-27 17:51:29,194 INFO L175 Difference]: Start difference. First operand has 321 places, 415 transitions, 5823 flow. Second operand 8 states and 224 transitions. [2024-06-27 17:51:29,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 443 transitions, 6953 flow [2024-06-27 17:51:30,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 443 transitions, 6619 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-27 17:51:30,593 INFO L231 Difference]: Finished difference. Result has 319 places, 418 transitions, 5767 flow [2024-06-27 17:51:30,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5497, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5767, PETRI_PLACES=319, PETRI_TRANSITIONS=418} [2024-06-27 17:51:30,593 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 269 predicate places. [2024-06-27 17:51:30,594 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 418 transitions, 5767 flow [2024-06-27 17:51:30,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:30,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:30,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:30,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 17:51:30,594 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:30,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:30,594 INFO L85 PathProgramCache]: Analyzing trace with hash -2045740909, now seen corresponding path program 15 times [2024-06-27 17:51:30,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:30,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756693374] [2024-06-27 17:51:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:30,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:30,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:30,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756693374] [2024-06-27 17:51:30,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756693374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:30,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:30,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:30,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554441489] [2024-06-27 17:51:30,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:30,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:30,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:30,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:30,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:30,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:30,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 418 transitions, 5767 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:30,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:30,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:30,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:31,720 INFO L124 PetriNetUnfolderBase]: 3828/6481 cut-off events. [2024-06-27 17:51:31,720 INFO L125 PetriNetUnfolderBase]: For 330440/330470 co-relation queries the response was YES. [2024-06-27 17:51:31,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39661 conditions, 6481 events. 3828/6481 cut-off events. For 330440/330470 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 45368 event pairs, 1090 based on Foata normal form. 1/6164 useless extension candidates. Maximal degree in co-relation 39519. Up to 5559 conditions per place. [2024-06-27 17:51:31,792 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 319 selfloop transitions, 112 changer transitions 0/446 dead transitions. [2024-06-27 17:51:31,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 446 transitions, 6699 flow [2024-06-27 17:51:31,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:31,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:31,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-06-27 17:51:31,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6038647342995169 [2024-06-27 17:51:31,793 INFO L175 Difference]: Start difference. First operand has 319 places, 418 transitions, 5767 flow. Second operand 9 states and 250 transitions. [2024-06-27 17:51:31,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 446 transitions, 6699 flow [2024-06-27 17:51:33,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 446 transitions, 6498 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:33,282 INFO L231 Difference]: Finished difference. Result has 323 places, 418 transitions, 5800 flow [2024-06-27 17:51:33,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5566, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5800, PETRI_PLACES=323, PETRI_TRANSITIONS=418} [2024-06-27 17:51:33,283 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 273 predicate places. [2024-06-27 17:51:33,283 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 418 transitions, 5800 flow [2024-06-27 17:51:33,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:33,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:33,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:33,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 17:51:33,283 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:33,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:33,283 INFO L85 PathProgramCache]: Analyzing trace with hash 458319937, now seen corresponding path program 1 times [2024-06-27 17:51:33,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:33,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180483299] [2024-06-27 17:51:33,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:33,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:33,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:33,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180483299] [2024-06-27 17:51:33,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180483299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:33,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:33,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:33,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038841965] [2024-06-27 17:51:33,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:33,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:33,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:33,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:33,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:33,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:33,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 418 transitions, 5800 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:33,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:33,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:33,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:34,511 INFO L124 PetriNetUnfolderBase]: 4092/6940 cut-off events. [2024-06-27 17:51:34,511 INFO L125 PetriNetUnfolderBase]: For 433868/433898 co-relation queries the response was YES. [2024-06-27 17:51:34,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43538 conditions, 6940 events. 4092/6940 cut-off events. For 433868/433898 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 49455 event pairs, 1082 based on Foata normal form. 12/6628 useless extension candidates. Maximal degree in co-relation 43395. Up to 4878 conditions per place. [2024-06-27 17:51:34,579 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 252 selfloop transitions, 191 changer transitions 0/458 dead transitions. [2024-06-27 17:51:34,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 458 transitions, 7068 flow [2024-06-27 17:51:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:34,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:34,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 17:51:34,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6331521739130435 [2024-06-27 17:51:34,580 INFO L175 Difference]: Start difference. First operand has 323 places, 418 transitions, 5800 flow. Second operand 8 states and 233 transitions. [2024-06-27 17:51:34,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 458 transitions, 7068 flow [2024-06-27 17:51:35,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 458 transitions, 6781 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 17:51:35,899 INFO L231 Difference]: Finished difference. Result has 321 places, 422 transitions, 5990 flow [2024-06-27 17:51:35,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5515, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5990, PETRI_PLACES=321, PETRI_TRANSITIONS=422} [2024-06-27 17:51:35,900 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 271 predicate places. [2024-06-27 17:51:35,900 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 422 transitions, 5990 flow [2024-06-27 17:51:35,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:35,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:35,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:35,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 17:51:35,900 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:35,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:35,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1589360105, now seen corresponding path program 2 times [2024-06-27 17:51:35,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:35,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329681121] [2024-06-27 17:51:35,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:35,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:35,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:35,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329681121] [2024-06-27 17:51:35,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329681121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:35,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:35,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:35,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462196821] [2024-06-27 17:51:35,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:35,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:35,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:35,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:35,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:36,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:36,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 422 transitions, 5990 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:36,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:36,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:36,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:37,182 INFO L124 PetriNetUnfolderBase]: 4382/7416 cut-off events. [2024-06-27 17:51:37,182 INFO L125 PetriNetUnfolderBase]: For 504029/504065 co-relation queries the response was YES. [2024-06-27 17:51:37,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48691 conditions, 7416 events. 4382/7416 cut-off events. For 504029/504065 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 53462 event pairs, 1284 based on Foata normal form. 12/7082 useless extension candidates. Maximal degree in co-relation 48548. Up to 5979 conditions per place. [2024-06-27 17:51:37,274 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 263 selfloop transitions, 178 changer transitions 0/456 dead transitions. [2024-06-27 17:51:37,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 456 transitions, 7244 flow [2024-06-27 17:51:37,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:37,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 17:51:37,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-06-27 17:51:37,275 INFO L175 Difference]: Start difference. First operand has 321 places, 422 transitions, 5990 flow. Second operand 8 states and 228 transitions. [2024-06-27 17:51:37,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 456 transitions, 7244 flow [2024-06-27 17:51:38,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 456 transitions, 6998 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:38,789 INFO L231 Difference]: Finished difference. Result has 325 places, 426 transitions, 6201 flow [2024-06-27 17:51:38,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5744, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6201, PETRI_PLACES=325, PETRI_TRANSITIONS=426} [2024-06-27 17:51:38,789 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 275 predicate places. [2024-06-27 17:51:38,790 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 426 transitions, 6201 flow [2024-06-27 17:51:38,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:38,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:38,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:38,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 17:51:38,790 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:38,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:38,790 INFO L85 PathProgramCache]: Analyzing trace with hash 547033567, now seen corresponding path program 3 times [2024-06-27 17:51:38,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:38,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564127275] [2024-06-27 17:51:38,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:38,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:38,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:38,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564127275] [2024-06-27 17:51:38,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564127275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:38,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:38,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:38,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053273061] [2024-06-27 17:51:38,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:38,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:38,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:38,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:38,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:38,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:38,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 426 transitions, 6201 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:38,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:38,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:38,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:40,072 INFO L124 PetriNetUnfolderBase]: 4346/7364 cut-off events. [2024-06-27 17:51:40,072 INFO L125 PetriNetUnfolderBase]: For 470185/470221 co-relation queries the response was YES. [2024-06-27 17:51:40,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47411 conditions, 7364 events. 4346/7364 cut-off events. For 470185/470221 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 53060 event pairs, 1322 based on Foata normal form. 16/7030 useless extension candidates. Maximal degree in co-relation 47266. Up to 6117 conditions per place. [2024-06-27 17:51:40,149 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 261 selfloop transitions, 174 changer transitions 0/450 dead transitions. [2024-06-27 17:51:40,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 450 transitions, 7153 flow [2024-06-27 17:51:40,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:40,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:40,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-27 17:51:40,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6032608695652174 [2024-06-27 17:51:40,150 INFO L175 Difference]: Start difference. First operand has 325 places, 426 transitions, 6201 flow. Second operand 8 states and 222 transitions. [2024-06-27 17:51:40,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 450 transitions, 7153 flow [2024-06-27 17:51:41,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 450 transitions, 6889 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:41,652 INFO L231 Difference]: Finished difference. Result has 329 places, 426 transitions, 6291 flow [2024-06-27 17:51:41,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5937, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6291, PETRI_PLACES=329, PETRI_TRANSITIONS=426} [2024-06-27 17:51:41,653 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 279 predicate places. [2024-06-27 17:51:41,653 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 426 transitions, 6291 flow [2024-06-27 17:51:41,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:41,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:41,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:41,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 17:51:41,653 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:41,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:41,654 INFO L85 PathProgramCache]: Analyzing trace with hash 868566949, now seen corresponding path program 4 times [2024-06-27 17:51:41,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:41,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434075525] [2024-06-27 17:51:41,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:41,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:41,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:41,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434075525] [2024-06-27 17:51:41,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434075525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:41,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:41,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:41,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135926224] [2024-06-27 17:51:41,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:41,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:41,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:41,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:41,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:41,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:41,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 426 transitions, 6291 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:41,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:41,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:41,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:43,011 INFO L124 PetriNetUnfolderBase]: 4494/7618 cut-off events. [2024-06-27 17:51:43,011 INFO L125 PetriNetUnfolderBase]: For 477552/477591 co-relation queries the response was YES. [2024-06-27 17:51:43,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48906 conditions, 7618 events. 4494/7618 cut-off events. For 477552/477591 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 55334 event pairs, 1361 based on Foata normal form. 16/7275 useless extension candidates. Maximal degree in co-relation 48759. Up to 6567 conditions per place. [2024-06-27 17:51:43,105 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 383 selfloop transitions, 52 changer transitions 0/450 dead transitions. [2024-06-27 17:51:43,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 450 transitions, 7287 flow [2024-06-27 17:51:43,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:43,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:43,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-06-27 17:51:43,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772946859903382 [2024-06-27 17:51:43,106 INFO L175 Difference]: Start difference. First operand has 329 places, 426 transitions, 6291 flow. Second operand 9 states and 239 transitions. [2024-06-27 17:51:43,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 450 transitions, 7287 flow [2024-06-27 17:51:44,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 450 transitions, 6931 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 17:51:44,926 INFO L231 Difference]: Finished difference. Result has 331 places, 428 transitions, 6099 flow [2024-06-27 17:51:44,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5935, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6099, PETRI_PLACES=331, PETRI_TRANSITIONS=428} [2024-06-27 17:51:44,926 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 281 predicate places. [2024-06-27 17:51:44,926 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 428 transitions, 6099 flow [2024-06-27 17:51:44,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:44,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:44,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:44,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 17:51:44,927 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:44,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:44,927 INFO L85 PathProgramCache]: Analyzing trace with hash 868419079, now seen corresponding path program 5 times [2024-06-27 17:51:44,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:44,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393275614] [2024-06-27 17:51:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:44,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:45,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:45,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393275614] [2024-06-27 17:51:45,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393275614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:45,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:45,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:45,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166940321] [2024-06-27 17:51:45,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:45,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:45,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:45,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:45,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:45,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:45,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 428 transitions, 6099 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:45,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:45,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:45,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:46,364 INFO L124 PetriNetUnfolderBase]: 4692/7973 cut-off events. [2024-06-27 17:51:46,364 INFO L125 PetriNetUnfolderBase]: For 510691/510736 co-relation queries the response was YES. [2024-06-27 17:51:46,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51648 conditions, 7973 events. 4692/7973 cut-off events. For 510691/510736 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 58436 event pairs, 1400 based on Foata normal form. 12/7615 useless extension candidates. Maximal degree in co-relation 51500. Up to 6461 conditions per place. [2024-06-27 17:51:46,454 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 385 selfloop transitions, 59 changer transitions 0/459 dead transitions. [2024-06-27 17:51:46,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 459 transitions, 7345 flow [2024-06-27 17:51:46,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:46,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:46,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-27 17:51:46,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5893719806763285 [2024-06-27 17:51:46,455 INFO L175 Difference]: Start difference. First operand has 331 places, 428 transitions, 6099 flow. Second operand 9 states and 244 transitions. [2024-06-27 17:51:46,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 459 transitions, 7345 flow [2024-06-27 17:51:48,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 459 transitions, 7217 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 17:51:48,386 INFO L231 Difference]: Finished difference. Result has 333 places, 431 transitions, 6176 flow [2024-06-27 17:51:48,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5971, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6176, PETRI_PLACES=333, PETRI_TRANSITIONS=431} [2024-06-27 17:51:48,386 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 283 predicate places. [2024-06-27 17:51:48,386 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 431 transitions, 6176 flow [2024-06-27 17:51:48,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:48,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:48,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:48,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 17:51:48,387 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:48,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:48,387 INFO L85 PathProgramCache]: Analyzing trace with hash 874144531, now seen corresponding path program 1 times [2024-06-27 17:51:48,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:48,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608740380] [2024-06-27 17:51:48,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:48,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:48,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:48,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608740380] [2024-06-27 17:51:48,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608740380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:48,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:48,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:48,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285256483] [2024-06-27 17:51:48,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:48,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:48,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:48,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:48,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:48,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:48,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 431 transitions, 6176 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:48,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:48,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:48,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:49,867 INFO L124 PetriNetUnfolderBase]: 4923/8388 cut-off events. [2024-06-27 17:51:49,867 INFO L125 PetriNetUnfolderBase]: For 564765/564817 co-relation queries the response was YES. [2024-06-27 17:51:49,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54901 conditions, 8388 events. 4923/8388 cut-off events. For 564765/564817 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 62010 event pairs, 1514 based on Foata normal form. 12/8020 useless extension candidates. Maximal degree in co-relation 54752. Up to 6916 conditions per place. [2024-06-27 17:51:49,974 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 414 selfloop transitions, 34 changer transitions 0/463 dead transitions. [2024-06-27 17:51:49,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 463 transitions, 7444 flow [2024-06-27 17:51:49,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-27 17:51:49,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821256038647343 [2024-06-27 17:51:49,974 INFO L175 Difference]: Start difference. First operand has 333 places, 431 transitions, 6176 flow. Second operand 9 states and 241 transitions. [2024-06-27 17:51:49,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 463 transitions, 7444 flow [2024-06-27 17:51:52,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 463 transitions, 7341 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:52,465 INFO L231 Difference]: Finished difference. Result has 338 places, 435 transitions, 6255 flow [2024-06-27 17:51:52,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6073, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6255, PETRI_PLACES=338, PETRI_TRANSITIONS=435} [2024-06-27 17:51:52,465 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 288 predicate places. [2024-06-27 17:51:52,465 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 435 transitions, 6255 flow [2024-06-27 17:51:52,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:52,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:52,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:52,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 17:51:52,465 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:52,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:52,466 INFO L85 PathProgramCache]: Analyzing trace with hash -2037016889, now seen corresponding path program 6 times [2024-06-27 17:51:52,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:52,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009984241] [2024-06-27 17:51:52,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:52,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:52,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:52,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009984241] [2024-06-27 17:51:52,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009984241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:52,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:52,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:52,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817379307] [2024-06-27 17:51:52,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:52,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:52,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:52,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:52,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:52,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:52,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 435 transitions, 6255 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:52,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:52,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:52,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:53,980 INFO L124 PetriNetUnfolderBase]: 5045/8578 cut-off events. [2024-06-27 17:51:53,980 INFO L125 PetriNetUnfolderBase]: For 587567/587610 co-relation queries the response was YES. [2024-06-27 17:51:54,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56343 conditions, 8578 events. 5045/8578 cut-off events. For 587567/587610 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 63681 event pairs, 1603 based on Foata normal form. 16/8203 useless extension candidates. Maximal degree in co-relation 56191. Up to 7122 conditions per place. [2024-06-27 17:51:54,098 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 335 selfloop transitions, 121 changer transitions 0/471 dead transitions. [2024-06-27 17:51:54,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 471 transitions, 7333 flow [2024-06-27 17:51:54,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:54,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:54,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2024-06-27 17:51:54,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6135265700483091 [2024-06-27 17:51:54,099 INFO L175 Difference]: Start difference. First operand has 338 places, 435 transitions, 6255 flow. Second operand 9 states and 254 transitions. [2024-06-27 17:51:54,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 471 transitions, 7333 flow [2024-06-27 17:51:56,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 471 transitions, 7266 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:56,875 INFO L231 Difference]: Finished difference. Result has 343 places, 437 transitions, 6502 flow [2024-06-27 17:51:56,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6188, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6502, PETRI_PLACES=343, PETRI_TRANSITIONS=437} [2024-06-27 17:51:56,876 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 293 predicate places. [2024-06-27 17:51:56,876 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 437 transitions, 6502 flow [2024-06-27 17:51:56,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:56,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:56,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:56,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 17:51:56,876 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:56,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:56,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2037164759, now seen corresponding path program 7 times [2024-06-27 17:51:56,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:56,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943928217] [2024-06-27 17:51:56,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:56,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:56,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:56,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943928217] [2024-06-27 17:51:56,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943928217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:56,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:56,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:56,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038224728] [2024-06-27 17:51:56,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:56,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:56,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:56,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:56,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:57,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:51:57,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 437 transitions, 6502 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:57,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:57,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:51:57,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:58,537 INFO L124 PetriNetUnfolderBase]: 5177/8785 cut-off events. [2024-06-27 17:51:58,537 INFO L125 PetriNetUnfolderBase]: For 597876/597922 co-relation queries the response was YES. [2024-06-27 17:51:58,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58398 conditions, 8785 events. 5177/8785 cut-off events. For 597876/597922 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 65409 event pairs, 1342 based on Foata normal form. 12/8413 useless extension candidates. Maximal degree in co-relation 58244. Up to 6438 conditions per place. [2024-06-27 17:51:58,639 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 329 selfloop transitions, 138 changer transitions 0/482 dead transitions. [2024-06-27 17:51:58,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 482 transitions, 7818 flow [2024-06-27 17:51:58,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:58,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:58,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 263 transitions. [2024-06-27 17:51:58,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6352657004830918 [2024-06-27 17:51:58,640 INFO L175 Difference]: Start difference. First operand has 343 places, 437 transitions, 6502 flow. Second operand 9 states and 263 transitions. [2024-06-27 17:51:58,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 482 transitions, 7818 flow [2024-06-27 17:52:01,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 482 transitions, 7554 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 17:52:01,096 INFO L231 Difference]: Finished difference. Result has 345 places, 439 transitions, 6580 flow [2024-06-27 17:52:01,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6238, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6580, PETRI_PLACES=345, PETRI_TRANSITIONS=439} [2024-06-27 17:52:01,096 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 295 predicate places. [2024-06-27 17:52:01,096 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 439 transitions, 6580 flow [2024-06-27 17:52:01,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:01,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:01,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:01,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 17:52:01,097 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:01,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:01,097 INFO L85 PathProgramCache]: Analyzing trace with hash 995029557, now seen corresponding path program 2 times [2024-06-27 17:52:01,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:01,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044000434] [2024-06-27 17:52:01,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:01,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:01,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:01,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044000434] [2024-06-27 17:52:01,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044000434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:01,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:01,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:01,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792793692] [2024-06-27 17:52:01,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:01,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:01,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:01,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:01,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:01,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:01,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 439 transitions, 6580 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:01,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:01,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:01,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:02,783 INFO L124 PetriNetUnfolderBase]: 5434/9222 cut-off events. [2024-06-27 17:52:02,783 INFO L125 PetriNetUnfolderBase]: For 666530/666590 co-relation queries the response was YES. [2024-06-27 17:52:02,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62530 conditions, 9222 events. 5434/9222 cut-off events. For 666530/666590 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 69537 event pairs, 1311 based on Foata normal form. 12/8842 useless extension candidates. Maximal degree in co-relation 62375. Up to 6871 conditions per place. [2024-06-27 17:52:02,908 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 380 selfloop transitions, 88 changer transitions 0/483 dead transitions. [2024-06-27 17:52:02,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 483 transitions, 7946 flow [2024-06-27 17:52:02,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:52:02,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:52:02,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 17:52:02,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440217391304348 [2024-06-27 17:52:02,910 INFO L175 Difference]: Start difference. First operand has 345 places, 439 transitions, 6580 flow. Second operand 8 states and 237 transitions. [2024-06-27 17:52:02,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 483 transitions, 7946 flow [2024-06-27 17:52:05,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 483 transitions, 7742 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 17:52:05,170 INFO L231 Difference]: Finished difference. Result has 349 places, 444 transitions, 6724 flow [2024-06-27 17:52:05,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6378, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6724, PETRI_PLACES=349, PETRI_TRANSITIONS=444} [2024-06-27 17:52:05,171 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 299 predicate places. [2024-06-27 17:52:05,171 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 444 transitions, 6724 flow [2024-06-27 17:52:05,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:05,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:05,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:05,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 17:52:05,171 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:05,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:05,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1004226327, now seen corresponding path program 3 times [2024-06-27 17:52:05,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:05,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205826722] [2024-06-27 17:52:05,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:05,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:05,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:05,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205826722] [2024-06-27 17:52:05,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205826722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:05,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:05,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:05,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986980034] [2024-06-27 17:52:05,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:05,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:05,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:05,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:05,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:05,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:05,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 444 transitions, 6724 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:05,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:05,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:05,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:06,894 INFO L124 PetriNetUnfolderBase]: 5573/9478 cut-off events. [2024-06-27 17:52:06,894 INFO L125 PetriNetUnfolderBase]: For 679093/679185 co-relation queries the response was YES. [2024-06-27 17:52:06,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65141 conditions, 9478 events. 5573/9478 cut-off events. For 679093/679185 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 72019 event pairs, 1322 based on Foata normal form. 24/9102 useless extension candidates. Maximal degree in co-relation 64983. Up to 6743 conditions per place. [2024-06-27 17:52:07,019 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 388 selfloop transitions, 85 changer transitions 0/488 dead transitions. [2024-06-27 17:52:07,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 488 transitions, 8304 flow [2024-06-27 17:52:07,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:52:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:52:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-27 17:52:07,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6645962732919255 [2024-06-27 17:52:07,020 INFO L175 Difference]: Start difference. First operand has 349 places, 444 transitions, 6724 flow. Second operand 7 states and 214 transitions. [2024-06-27 17:52:07,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 488 transitions, 8304 flow [2024-06-27 17:52:10,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 488 transitions, 8154 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-27 17:52:10,168 INFO L231 Difference]: Finished difference. Result has 354 places, 450 transitions, 6935 flow [2024-06-27 17:52:10,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6586, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6935, PETRI_PLACES=354, PETRI_TRANSITIONS=450} [2024-06-27 17:52:10,168 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 304 predicate places. [2024-06-27 17:52:10,168 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 450 transitions, 6935 flow [2024-06-27 17:52:10,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:10,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:10,169 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] [2024-06-27 17:52:10,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 17:52:10,169 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:10,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:10,169 INFO L85 PathProgramCache]: Analyzing trace with hash -928754427, now seen corresponding path program 1 times [2024-06-27 17:52:10,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:10,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95620741] [2024-06-27 17:52:10,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:10,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:10,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:10,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95620741] [2024-06-27 17:52:10,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95620741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:10,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:10,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:10,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7322492] [2024-06-27 17:52:10,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:10,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:10,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:10,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:10,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:10,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:10,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 450 transitions, 6935 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:10,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:10,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:10,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:12,012 INFO L124 PetriNetUnfolderBase]: 5600/9533 cut-off events. [2024-06-27 17:52:12,012 INFO L125 PetriNetUnfolderBase]: For 639629/639702 co-relation queries the response was YES. [2024-06-27 17:52:12,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66410 conditions, 9533 events. 5600/9533 cut-off events. For 639629/639702 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 72749 event pairs, 1850 based on Foata normal form. 12/9121 useless extension candidates. Maximal degree in co-relation 66248. Up to 8285 conditions per place. [2024-06-27 17:52:12,132 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 356 selfloop transitions, 105 changer transitions 0/476 dead transitions. [2024-06-27 17:52:12,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 476 transitions, 8247 flow [2024-06-27 17:52:12,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:52:12,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:52:12,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-27 17:52:12,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-27 17:52:12,132 INFO L175 Difference]: Start difference. First operand has 354 places, 450 transitions, 6935 flow. Second operand 6 states and 174 transitions. [2024-06-27 17:52:12,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 476 transitions, 8247 flow [2024-06-27 17:52:15,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 476 transitions, 8115 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-27 17:52:15,798 INFO L231 Difference]: Finished difference. Result has 359 places, 459 transitions, 7246 flow [2024-06-27 17:52:15,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6803, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7246, PETRI_PLACES=359, PETRI_TRANSITIONS=459} [2024-06-27 17:52:15,798 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 309 predicate places. [2024-06-27 17:52:15,798 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 459 transitions, 7246 flow [2024-06-27 17:52:15,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:15,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:15,799 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] [2024-06-27 17:52:15,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 17:52:15,799 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:15,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:15,799 INFO L85 PathProgramCache]: Analyzing trace with hash -138446551, now seen corresponding path program 2 times [2024-06-27 17:52:15,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:15,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376715570] [2024-06-27 17:52:15,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:15,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:15,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:15,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376715570] [2024-06-27 17:52:15,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376715570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:15,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:15,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:15,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104179813] [2024-06-27 17:52:15,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:15,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:15,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:15,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:15,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:15,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:15,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 459 transitions, 7246 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:15,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:15,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:15,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:17,776 INFO L124 PetriNetUnfolderBase]: 5607/9546 cut-off events. [2024-06-27 17:52:17,776 INFO L125 PetriNetUnfolderBase]: For 648258/648319 co-relation queries the response was YES. [2024-06-27 17:52:17,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66181 conditions, 9546 events. 5607/9546 cut-off events. For 648258/648319 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 72735 event pairs, 1831 based on Foata normal form. 1/9120 useless extension candidates. Maximal degree in co-relation 66016. Up to 8439 conditions per place. [2024-06-27 17:52:17,876 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 431 selfloop transitions, 43 changer transitions 0/489 dead transitions. [2024-06-27 17:52:17,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 489 transitions, 8324 flow [2024-06-27 17:52:17,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:52:17,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:52:17,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-27 17:52:17,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592391304347826 [2024-06-27 17:52:17,877 INFO L175 Difference]: Start difference. First operand has 359 places, 459 transitions, 7246 flow. Second operand 8 states and 218 transitions. [2024-06-27 17:52:17,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 489 transitions, 8324 flow [2024-06-27 17:52:21,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 489 transitions, 8172 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 17:52:21,160 INFO L231 Difference]: Finished difference. Result has 363 places, 462 transitions, 7254 flow [2024-06-27 17:52:21,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7098, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7254, PETRI_PLACES=363, PETRI_TRANSITIONS=462} [2024-06-27 17:52:21,160 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 313 predicate places. [2024-06-27 17:52:21,160 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 462 transitions, 7254 flow [2024-06-27 17:52:21,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:21,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:21,160 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] [2024-06-27 17:52:21,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 17:52:21,160 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:21,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:21,161 INFO L85 PathProgramCache]: Analyzing trace with hash 867424755, now seen corresponding path program 1 times [2024-06-27 17:52:21,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:21,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597755459] [2024-06-27 17:52:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:21,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:21,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:21,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597755459] [2024-06-27 17:52:21,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597755459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:21,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:21,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:21,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792685199] [2024-06-27 17:52:21,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:21,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:21,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:21,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:21,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:21,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:21,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 462 transitions, 7254 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:21,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:21,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:21,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:22,958 INFO L124 PetriNetUnfolderBase]: 5624/9574 cut-off events. [2024-06-27 17:52:22,958 INFO L125 PetriNetUnfolderBase]: For 653180/653241 co-relation queries the response was YES. [2024-06-27 17:52:23,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66474 conditions, 9574 events. 5624/9574 cut-off events. For 653180/653241 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 72935 event pairs, 1831 based on Foata normal form. 1/9144 useless extension candidates. Maximal degree in co-relation 66309. Up to 8419 conditions per place. [2024-06-27 17:52:23,083 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 420 selfloop transitions, 61 changer transitions 0/496 dead transitions. [2024-06-27 17:52:23,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 496 transitions, 8608 flow [2024-06-27 17:52:23,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:52:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:52:23,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-27 17:52:23,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6059782608695652 [2024-06-27 17:52:23,084 INFO L175 Difference]: Start difference. First operand has 363 places, 462 transitions, 7254 flow. Second operand 8 states and 223 transitions. [2024-06-27 17:52:23,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 496 transitions, 8608 flow [2024-06-27 17:52:25,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 496 transitions, 8500 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 17:52:25,596 INFO L231 Difference]: Finished difference. Result has 365 places, 468 transitions, 7416 flow [2024-06-27 17:52:25,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7146, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7416, PETRI_PLACES=365, PETRI_TRANSITIONS=468} [2024-06-27 17:52:25,597 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 315 predicate places. [2024-06-27 17:52:25,597 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 468 transitions, 7416 flow [2024-06-27 17:52:25,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:25,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:25,597 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] [2024-06-27 17:52:25,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 17:52:25,597 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:25,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:25,597 INFO L85 PathProgramCache]: Analyzing trace with hash -751502751, now seen corresponding path program 2 times [2024-06-27 17:52:25,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:25,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627600118] [2024-06-27 17:52:25,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:25,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:25,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:25,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627600118] [2024-06-27 17:52:25,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627600118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:25,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:25,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:25,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089096038] [2024-06-27 17:52:25,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:25,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:25,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:25,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:25,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:25,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:25,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 468 transitions, 7416 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:25,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:25,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:25,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:27,374 INFO L124 PetriNetUnfolderBase]: 5648/9607 cut-off events. [2024-06-27 17:52:27,374 INFO L125 PetriNetUnfolderBase]: For 671602/671663 co-relation queries the response was YES. [2024-06-27 17:52:27,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67136 conditions, 9607 events. 5648/9607 cut-off events. For 671602/671663 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 73091 event pairs, 1831 based on Foata normal form. 1/9171 useless extension candidates. Maximal degree in co-relation 66970. Up to 8444 conditions per place. [2024-06-27 17:52:27,493 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 422 selfloop transitions, 71 changer transitions 0/508 dead transitions. [2024-06-27 17:52:27,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 508 transitions, 9039 flow [2024-06-27 17:52:27,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:27,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:27,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 271 transitions. [2024-06-27 17:52:27,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891304347826087 [2024-06-27 17:52:27,494 INFO L175 Difference]: Start difference. First operand has 365 places, 468 transitions, 7416 flow. Second operand 10 states and 271 transitions. [2024-06-27 17:52:27,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 508 transitions, 9039 flow [2024-06-27 17:52:30,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 508 transitions, 8801 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-27 17:52:30,626 INFO L231 Difference]: Finished difference. Result has 370 places, 477 transitions, 7511 flow [2024-06-27 17:52:30,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7210, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7511, PETRI_PLACES=370, PETRI_TRANSITIONS=477} [2024-06-27 17:52:30,626 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 320 predicate places. [2024-06-27 17:52:30,626 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 477 transitions, 7511 flow [2024-06-27 17:52:30,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:30,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:30,626 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] [2024-06-27 17:52:30,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 17:52:30,627 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:30,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:30,627 INFO L85 PathProgramCache]: Analyzing trace with hash -751265601, now seen corresponding path program 3 times [2024-06-27 17:52:30,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:30,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298458763] [2024-06-27 17:52:30,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:30,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:30,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:30,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298458763] [2024-06-27 17:52:30,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298458763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:30,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:30,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:30,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965914109] [2024-06-27 17:52:30,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:30,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:30,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:30,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:30,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:30,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:30,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 477 transitions, 7511 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:30,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:30,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:30,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:32,565 INFO L124 PetriNetUnfolderBase]: 5645/9603 cut-off events. [2024-06-27 17:52:32,565 INFO L125 PetriNetUnfolderBase]: For 678425/678486 co-relation queries the response was YES. [2024-06-27 17:52:32,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67099 conditions, 9603 events. 5645/9603 cut-off events. For 678425/678486 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 73058 event pairs, 1831 based on Foata normal form. 1/9167 useless extension candidates. Maximal degree in co-relation 66933. Up to 8441 conditions per place. [2024-06-27 17:52:32,679 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 420 selfloop transitions, 73 changer transitions 0/508 dead transitions. [2024-06-27 17:52:32,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 508 transitions, 8763 flow [2024-06-27 17:52:32,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:52:32,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:52:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 289 transitions. [2024-06-27 17:52:32,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5711462450592886 [2024-06-27 17:52:32,680 INFO L175 Difference]: Start difference. First operand has 370 places, 477 transitions, 7511 flow. Second operand 11 states and 289 transitions. [2024-06-27 17:52:32,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 508 transitions, 8763 flow [2024-06-27 17:52:35,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 508 transitions, 8541 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 17:52:35,939 INFO L231 Difference]: Finished difference. Result has 374 places, 477 transitions, 7441 flow [2024-06-27 17:52:35,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7289, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7441, PETRI_PLACES=374, PETRI_TRANSITIONS=477} [2024-06-27 17:52:35,939 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 324 predicate places. [2024-06-27 17:52:35,940 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 477 transitions, 7441 flow [2024-06-27 17:52:35,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:35,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:35,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:35,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 17:52:35,940 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:35,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:35,940 INFO L85 PathProgramCache]: Analyzing trace with hash -923992827, now seen corresponding path program 3 times [2024-06-27 17:52:35,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:35,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620168827] [2024-06-27 17:52:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:35,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:36,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:36,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620168827] [2024-06-27 17:52:36,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620168827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:36,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:36,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:36,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815667618] [2024-06-27 17:52:36,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:36,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:36,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:36,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:36,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:36,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:36,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 477 transitions, 7441 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:36,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:36,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:36,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:37,788 INFO L124 PetriNetUnfolderBase]: 5652/9612 cut-off events. [2024-06-27 17:52:37,788 INFO L125 PetriNetUnfolderBase]: For 690552/690613 co-relation queries the response was YES. [2024-06-27 17:52:37,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67245 conditions, 9612 events. 5652/9612 cut-off events. For 690552/690613 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 73102 event pairs, 1830 based on Foata normal form. 1/9174 useless extension candidates. Maximal degree in co-relation 67078. Up to 8494 conditions per place. [2024-06-27 17:52:37,916 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 448 selfloop transitions, 47 changer transitions 0/510 dead transitions. [2024-06-27 17:52:37,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 510 transitions, 8569 flow [2024-06-27 17:52:37,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:52:37,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:52:37,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 284 transitions. [2024-06-27 17:52:37,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612648221343873 [2024-06-27 17:52:37,917 INFO L175 Difference]: Start difference. First operand has 374 places, 477 transitions, 7441 flow. Second operand 11 states and 284 transitions. [2024-06-27 17:52:37,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 510 transitions, 8569 flow [2024-06-27 17:52:41,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 510 transitions, 8432 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 17:52:41,337 INFO L231 Difference]: Finished difference. Result has 376 places, 480 transitions, 7474 flow [2024-06-27 17:52:41,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7304, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7474, PETRI_PLACES=376, PETRI_TRANSITIONS=480} [2024-06-27 17:52:41,338 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 326 predicate places. [2024-06-27 17:52:41,338 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 480 transitions, 7474 flow [2024-06-27 17:52:41,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:41,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:41,338 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] [2024-06-27 17:52:41,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 17:52:41,338 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:41,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:41,338 INFO L85 PathProgramCache]: Analyzing trace with hash 778766739, now seen corresponding path program 1 times [2024-06-27 17:52:41,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:41,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41589634] [2024-06-27 17:52:41,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:41,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:41,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:41,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41589634] [2024-06-27 17:52:41,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41589634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:41,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:41,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:41,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593127884] [2024-06-27 17:52:41,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:41,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:41,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:41,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:41,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:41,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:41,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 480 transitions, 7474 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:41,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:41,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:41,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:43,251 INFO L124 PetriNetUnfolderBase]: 5864/10023 cut-off events. [2024-06-27 17:52:43,251 INFO L125 PetriNetUnfolderBase]: For 729719/729780 co-relation queries the response was YES. [2024-06-27 17:52:43,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69171 conditions, 10023 events. 5864/10023 cut-off events. For 729719/729780 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 77279 event pairs, 1764 based on Foata normal form. 6/9577 useless extension candidates. Maximal degree in co-relation 69003. Up to 8319 conditions per place. [2024-06-27 17:52:43,383 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 456 selfloop transitions, 55 changer transitions 0/526 dead transitions. [2024-06-27 17:52:43,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 526 transitions, 8898 flow [2024-06-27 17:52:43,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:52:43,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:52:43,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-27 17:52:43,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-27 17:52:43,384 INFO L175 Difference]: Start difference. First operand has 376 places, 480 transitions, 7474 flow. Second operand 8 states and 232 transitions. [2024-06-27 17:52:43,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 526 transitions, 8898 flow [2024-06-27 17:52:47,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 526 transitions, 8776 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-27 17:52:47,695 INFO L231 Difference]: Finished difference. Result has 376 places, 484 transitions, 7555 flow [2024-06-27 17:52:47,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7352, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7555, PETRI_PLACES=376, PETRI_TRANSITIONS=484} [2024-06-27 17:52:47,696 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 326 predicate places. [2024-06-27 17:52:47,696 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 484 transitions, 7555 flow [2024-06-27 17:52:47,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:47,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:47,696 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] [2024-06-27 17:52:47,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 17:52:47,697 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:47,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:47,697 INFO L85 PathProgramCache]: Analyzing trace with hash 786176049, now seen corresponding path program 2 times [2024-06-27 17:52:47,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:47,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684049872] [2024-06-27 17:52:47,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:47,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:47,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:47,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684049872] [2024-06-27 17:52:47,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684049872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:47,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:47,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:52:47,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329237050] [2024-06-27 17:52:47,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:47,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:52:47,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:47,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:52:47,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:52:47,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:47,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 484 transitions, 7555 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:47,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:47,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:47,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:50,002 INFO L124 PetriNetUnfolderBase]: 5991/10210 cut-off events. [2024-06-27 17:52:50,002 INFO L125 PetriNetUnfolderBase]: For 747507/747571 co-relation queries the response was YES. [2024-06-27 17:52:50,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71098 conditions, 10210 events. 5991/10210 cut-off events. For 747507/747571 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 78786 event pairs, 1962 based on Foata normal form. 6/9758 useless extension candidates. Maximal degree in co-relation 70928. Up to 8865 conditions per place. [2024-06-27 17:52:50,114 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 458 selfloop transitions, 48 changer transitions 0/521 dead transitions. [2024-06-27 17:52:50,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 521 transitions, 8733 flow [2024-06-27 17:52:50,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:52:50,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:52:50,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-27 17:52:50,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2024-06-27 17:52:50,115 INFO L175 Difference]: Start difference. First operand has 376 places, 484 transitions, 7555 flow. Second operand 8 states and 226 transitions. [2024-06-27 17:52:50,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 521 transitions, 8733 flow [2024-06-27 17:52:54,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 521 transitions, 8626 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 17:52:54,079 INFO L231 Difference]: Finished difference. Result has 380 places, 486 transitions, 7598 flow [2024-06-27 17:52:54,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7450, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7598, PETRI_PLACES=380, PETRI_TRANSITIONS=486} [2024-06-27 17:52:54,080 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 330 predicate places. [2024-06-27 17:52:54,080 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 486 transitions, 7598 flow [2024-06-27 17:52:54,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:54,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:54,080 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] [2024-06-27 17:52:54,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 17:52:54,080 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:54,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:54,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1185511221, now seen corresponding path program 4 times [2024-06-27 17:52:54,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:54,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417163470] [2024-06-27 17:52:54,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:54,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:54,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:54,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417163470] [2024-06-27 17:52:54,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417163470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:54,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:54,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:54,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059865179] [2024-06-27 17:52:54,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:54,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:54,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:54,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:54,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:54,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:52:54,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 486 transitions, 7598 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:54,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:54,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:52:54,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:56,351 INFO L124 PetriNetUnfolderBase]: 6028/10250 cut-off events. [2024-06-27 17:52:56,351 INFO L125 PetriNetUnfolderBase]: For 752280/752355 co-relation queries the response was YES. [2024-06-27 17:52:56,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71669 conditions, 10250 events. 6028/10250 cut-off events. For 752280/752355 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 79168 event pairs, 1999 based on Foata normal form. 9/9791 useless extension candidates. Maximal degree in co-relation 71497. Up to 8792 conditions per place. [2024-06-27 17:52:56,473 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 344 selfloop transitions, 162 changer transitions 0/521 dead transitions. [2024-06-27 17:52:56,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 521 transitions, 9489 flow [2024-06-27 17:52:56,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:52:56,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:52:56,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 17:52:56,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6211180124223602 [2024-06-27 17:52:56,474 INFO L175 Difference]: Start difference. First operand has 380 places, 486 transitions, 7598 flow. Second operand 7 states and 200 transitions. [2024-06-27 17:52:56,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 521 transitions, 9489 flow [2024-06-27 17:53:00,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 521 transitions, 9387 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 17:53:00,806 INFO L231 Difference]: Finished difference. Result has 382 places, 498 transitions, 8055 flow [2024-06-27 17:53:00,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7496, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8055, PETRI_PLACES=382, PETRI_TRANSITIONS=498} [2024-06-27 17:53:00,807 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 332 predicate places. [2024-06-27 17:53:00,807 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 498 transitions, 8055 flow [2024-06-27 17:53:00,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:00,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:00,807 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] [2024-06-27 17:53:00,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 17:53:00,807 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:00,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:00,808 INFO L85 PathProgramCache]: Analyzing trace with hash -946467095, now seen corresponding path program 5 times [2024-06-27 17:53:00,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:00,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936928967] [2024-06-27 17:53:00,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:00,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:00,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:00,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936928967] [2024-06-27 17:53:00,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936928967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:00,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:00,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:00,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169341270] [2024-06-27 17:53:00,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:00,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:00,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:00,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:00,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:00,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:00,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 498 transitions, 8055 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:00,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:00,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:00,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:03,126 INFO L124 PetriNetUnfolderBase]: 6045/10276 cut-off events. [2024-06-27 17:53:03,126 INFO L125 PetriNetUnfolderBase]: For 771471/771546 co-relation queries the response was YES. [2024-06-27 17:53:03,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72261 conditions, 10276 events. 6045/10276 cut-off events. For 771471/771546 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 79273 event pairs, 1999 based on Foata normal form. 9/9813 useless extension candidates. Maximal degree in co-relation 72088. Up to 8811 conditions per place. [2024-06-27 17:53:03,242 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 344 selfloop transitions, 165 changer transitions 0/524 dead transitions. [2024-06-27 17:53:03,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 524 transitions, 9843 flow [2024-06-27 17:53:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:03,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:03,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-27 17:53:03,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149068322981367 [2024-06-27 17:53:03,243 INFO L175 Difference]: Start difference. First operand has 382 places, 498 transitions, 8055 flow. Second operand 7 states and 198 transitions. [2024-06-27 17:53:03,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 524 transitions, 9843 flow [2024-06-27 17:53:08,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 524 transitions, 9320 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-27 17:53:08,583 INFO L231 Difference]: Finished difference. Result has 384 places, 504 transitions, 7990 flow [2024-06-27 17:53:08,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7566, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7990, PETRI_PLACES=384, PETRI_TRANSITIONS=504} [2024-06-27 17:53:08,583 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 334 predicate places. [2024-06-27 17:53:08,583 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 504 transitions, 7990 flow [2024-06-27 17:53:08,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:08,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:08,584 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] [2024-06-27 17:53:08,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 17:53:08,584 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:08,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:08,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1156244405, now seen corresponding path program 6 times [2024-06-27 17:53:08,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:08,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357777267] [2024-06-27 17:53:08,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:08,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:08,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:08,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357777267] [2024-06-27 17:53:08,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357777267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:08,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:08,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:08,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34049472] [2024-06-27 17:53:08,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:08,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:08,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:08,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:08,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:08,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:08,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 504 transitions, 7990 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:08,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:08,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:08,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:10,884 INFO L124 PetriNetUnfolderBase]: 6042/10272 cut-off events. [2024-06-27 17:53:10,884 INFO L125 PetriNetUnfolderBase]: For 776920/776995 co-relation queries the response was YES. [2024-06-27 17:53:10,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72101 conditions, 10272 events. 6042/10272 cut-off events. For 776920/776995 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 79282 event pairs, 1999 based on Foata normal form. 9/9809 useless extension candidates. Maximal degree in co-relation 71928. Up to 8808 conditions per place. [2024-06-27 17:53:11,012 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 355 selfloop transitions, 157 changer transitions 0/527 dead transitions. [2024-06-27 17:53:11,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 527 transitions, 9676 flow [2024-06-27 17:53:11,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:11,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:11,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-27 17:53:11,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180124223602484 [2024-06-27 17:53:11,013 INFO L175 Difference]: Start difference. First operand has 384 places, 504 transitions, 7990 flow. Second operand 7 states and 199 transitions. [2024-06-27 17:53:11,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 527 transitions, 9676 flow [2024-06-27 17:53:15,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 527 transitions, 9413 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 17:53:15,352 INFO L231 Difference]: Finished difference. Result has 388 places, 504 transitions, 8047 flow [2024-06-27 17:53:15,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7727, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8047, PETRI_PLACES=388, PETRI_TRANSITIONS=504} [2024-06-27 17:53:15,353 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 338 predicate places. [2024-06-27 17:53:15,353 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 504 transitions, 8047 flow [2024-06-27 17:53:15,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:15,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:15,353 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] [2024-06-27 17:53:15,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 17:53:15,353 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:15,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:15,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1156124435, now seen corresponding path program 7 times [2024-06-27 17:53:15,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:15,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796035473] [2024-06-27 17:53:15,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:15,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:15,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:15,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796035473] [2024-06-27 17:53:15,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796035473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:15,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:15,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:15,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565575981] [2024-06-27 17:53:15,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:15,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:15,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:15,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:15,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:15,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:15,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 504 transitions, 8047 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:15,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:15,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:15,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:17,662 INFO L124 PetriNetUnfolderBase]: 6049/10301 cut-off events. [2024-06-27 17:53:17,662 INFO L125 PetriNetUnfolderBase]: For 793767/793895 co-relation queries the response was YES. [2024-06-27 17:53:17,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72386 conditions, 10301 events. 6049/10301 cut-off events. For 793767/793895 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 79618 event pairs, 2029 based on Foata normal form. 43/9896 useless extension candidates. Maximal degree in co-relation 72212. Up to 8816 conditions per place. [2024-06-27 17:53:17,796 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 350 selfloop transitions, 168 changer transitions 0/533 dead transitions. [2024-06-27 17:53:17,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 533 transitions, 9616 flow [2024-06-27 17:53:17,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:53:17,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:53:17,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-27 17:53:17,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114130434782609 [2024-06-27 17:53:17,797 INFO L175 Difference]: Start difference. First operand has 388 places, 504 transitions, 8047 flow. Second operand 8 states and 225 transitions. [2024-06-27 17:53:17,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 533 transitions, 9616 flow [2024-06-27 17:53:22,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 533 transitions, 9022 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-27 17:53:22,196 INFO L231 Difference]: Finished difference. Result has 388 places, 507 transitions, 7856 flow [2024-06-27 17:53:22,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7475, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7856, PETRI_PLACES=388, PETRI_TRANSITIONS=507} [2024-06-27 17:53:22,196 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 338 predicate places. [2024-06-27 17:53:22,196 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 507 transitions, 7856 flow [2024-06-27 17:53:22,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:22,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:22,196 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] [2024-06-27 17:53:22,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 17:53:22,196 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:22,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:22,197 INFO L85 PathProgramCache]: Analyzing trace with hash -809729439, now seen corresponding path program 4 times [2024-06-27 17:53:22,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:22,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468899257] [2024-06-27 17:53:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:22,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:22,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:22,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468899257] [2024-06-27 17:53:22,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468899257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:22,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:22,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:22,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963337242] [2024-06-27 17:53:22,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:22,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:22,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:22,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:22,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:22,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:22,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 507 transitions, 7856 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:22,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:22,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:22,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:24,439 INFO L124 PetriNetUnfolderBase]: 6077/10350 cut-off events. [2024-06-27 17:53:24,440 INFO L125 PetriNetUnfolderBase]: For 817134/817264 co-relation queries the response was YES. [2024-06-27 17:53:24,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72599 conditions, 10350 events. 6077/10350 cut-off events. For 817134/817264 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 80072 event pairs, 2055 based on Foata normal form. 18/9923 useless extension candidates. Maximal degree in co-relation 72426. Up to 8489 conditions per place. [2024-06-27 17:53:24,559 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 263 selfloop transitions, 267 changer transitions 0/545 dead transitions. [2024-06-27 17:53:24,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 545 transitions, 10048 flow [2024-06-27 17:53:24,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:53:24,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:53:24,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-27 17:53:24,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277173913043478 [2024-06-27 17:53:24,560 INFO L175 Difference]: Start difference. First operand has 388 places, 507 transitions, 7856 flow. Second operand 8 states and 231 transitions. [2024-06-27 17:53:24,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 545 transitions, 10048 flow [2024-06-27 17:53:28,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 545 transitions, 9796 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 17:53:28,393 INFO L231 Difference]: Finished difference. Result has 391 places, 517 transitions, 8386 flow [2024-06-27 17:53:28,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7604, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8386, PETRI_PLACES=391, PETRI_TRANSITIONS=517} [2024-06-27 17:53:28,394 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 341 predicate places. [2024-06-27 17:53:28,394 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 517 transitions, 8386 flow [2024-06-27 17:53:28,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:28,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:28,394 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] [2024-06-27 17:53:28,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 17:53:28,394 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:28,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:28,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1905197247, now seen corresponding path program 8 times [2024-06-27 17:53:28,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:28,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056717923] [2024-06-27 17:53:28,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:28,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:28,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:28,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056717923] [2024-06-27 17:53:28,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056717923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:28,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:28,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:28,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950686598] [2024-06-27 17:53:28,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:28,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:28,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:28,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:28,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:28,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:28,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 517 transitions, 8386 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:28,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:28,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:28,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:30,754 INFO L124 PetriNetUnfolderBase]: 6094/10342 cut-off events. [2024-06-27 17:53:30,755 INFO L125 PetriNetUnfolderBase]: For 842721/842851 co-relation queries the response was YES. [2024-06-27 17:53:30,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73436 conditions, 10342 events. 6094/10342 cut-off events. For 842721/842851 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 79699 event pairs, 2000 based on Foata normal form. 41/9918 useless extension candidates. Maximal degree in co-relation 73261. Up to 8871 conditions per place. [2024-06-27 17:53:30,878 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 359 selfloop transitions, 173 changer transitions 0/547 dead transitions. [2024-06-27 17:53:30,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 547 transitions, 10224 flow [2024-06-27 17:53:30,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:53:30,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:53:30,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-27 17:53:30,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-06-27 17:53:30,879 INFO L175 Difference]: Start difference. First operand has 391 places, 517 transitions, 8386 flow. Second operand 8 states and 224 transitions. [2024-06-27 17:53:30,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 547 transitions, 10224 flow [2024-06-27 17:53:35,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 547 transitions, 9880 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-27 17:53:35,219 INFO L231 Difference]: Finished difference. Result has 396 places, 523 transitions, 8486 flow [2024-06-27 17:53:35,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8046, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8486, PETRI_PLACES=396, PETRI_TRANSITIONS=523} [2024-06-27 17:53:35,219 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 346 predicate places. [2024-06-27 17:53:35,219 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 523 transitions, 8486 flow [2024-06-27 17:53:35,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:35,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:35,220 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] [2024-06-27 17:53:35,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 17:53:35,220 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:35,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:35,220 INFO L85 PathProgramCache]: Analyzing trace with hash -484988505, now seen corresponding path program 9 times [2024-06-27 17:53:35,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:35,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004109305] [2024-06-27 17:53:35,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:35,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:35,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:35,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004109305] [2024-06-27 17:53:35,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004109305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:35,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:35,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:35,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384653430] [2024-06-27 17:53:35,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:35,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:35,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:35,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:35,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:35,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:35,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 523 transitions, 8486 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:35,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:35,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:35,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:37,479 INFO L124 PetriNetUnfolderBase]: 6091/10340 cut-off events. [2024-06-27 17:53:37,479 INFO L125 PetriNetUnfolderBase]: For 846350/846479 co-relation queries the response was YES. [2024-06-27 17:53:37,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73658 conditions, 10340 events. 6091/10340 cut-off events. For 846350/846479 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 79725 event pairs, 2000 based on Foata normal form. 41/9916 useless extension candidates. Maximal degree in co-relation 73481. Up to 8868 conditions per place. [2024-06-27 17:53:37,604 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 359 selfloop transitions, 174 changer transitions 0/548 dead transitions. [2024-06-27 17:53:37,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 548 transitions, 10032 flow [2024-06-27 17:53:37,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:37,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 267 transitions. [2024-06-27 17:53:37,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804347826086956 [2024-06-27 17:53:37,605 INFO L175 Difference]: Start difference. First operand has 396 places, 523 transitions, 8486 flow. Second operand 10 states and 267 transitions. [2024-06-27 17:53:37,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 548 transitions, 10032 flow [2024-06-27 17:53:42,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 548 transitions, 9762 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:42,481 INFO L231 Difference]: Finished difference. Result has 402 places, 523 transitions, 8570 flow [2024-06-27 17:53:42,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8216, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8570, PETRI_PLACES=402, PETRI_TRANSITIONS=523} [2024-06-27 17:53:42,481 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 352 predicate places. [2024-06-27 17:53:42,481 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 523 transitions, 8570 flow [2024-06-27 17:53:42,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:42,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:42,481 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] [2024-06-27 17:53:42,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 17:53:42,482 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:42,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:42,482 INFO L85 PathProgramCache]: Analyzing trace with hash -484602369, now seen corresponding path program 5 times [2024-06-27 17:53:42,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:42,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414844583] [2024-06-27 17:53:42,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:42,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:42,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:42,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414844583] [2024-06-27 17:53:42,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414844583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:42,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:42,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:42,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389018873] [2024-06-27 17:53:42,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:42,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:42,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:42,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:42,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:42,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:42,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 523 transitions, 8570 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:42,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:42,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:42,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:44,819 INFO L124 PetriNetUnfolderBase]: 6108/10376 cut-off events. [2024-06-27 17:53:44,819 INFO L125 PetriNetUnfolderBase]: For 869229/869367 co-relation queries the response was YES. [2024-06-27 17:53:44,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74155 conditions, 10376 events. 6108/10376 cut-off events. For 869229/869367 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 80153 event pairs, 2030 based on Foata normal form. 19/9943 useless extension candidates. Maximal degree in co-relation 73976. Up to 8515 conditions per place. [2024-06-27 17:53:44,950 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 266 selfloop transitions, 273 changer transitions 0/554 dead transitions. [2024-06-27 17:53:44,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 554 transitions, 10668 flow [2024-06-27 17:53:44,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:53:44,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:53:44,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 17:53:44,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-06-27 17:53:44,951 INFO L175 Difference]: Start difference. First operand has 402 places, 523 transitions, 8570 flow. Second operand 8 states and 228 transitions. [2024-06-27 17:53:44,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 554 transitions, 10668 flow [2024-06-27 17:53:49,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 554 transitions, 10206 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 17:53:49,768 INFO L231 Difference]: Finished difference. Result has 400 places, 529 transitions, 8772 flow [2024-06-27 17:53:49,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8108, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8772, PETRI_PLACES=400, PETRI_TRANSITIONS=529} [2024-06-27 17:53:49,768 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 350 predicate places. [2024-06-27 17:53:49,769 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 529 transitions, 8772 flow [2024-06-27 17:53:49,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:49,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:49,769 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] [2024-06-27 17:53:49,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 17:53:49,769 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:49,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:49,769 INFO L85 PathProgramCache]: Analyzing trace with hash -643512833, now seen corresponding path program 6 times [2024-06-27 17:53:49,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:49,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790462674] [2024-06-27 17:53:49,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:49,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:49,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:49,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790462674] [2024-06-27 17:53:49,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790462674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:49,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:49,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:49,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315624015] [2024-06-27 17:53:49,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:49,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:49,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:49,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:49,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:49,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:49,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 529 transitions, 8772 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:49,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:49,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:49,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:52,069 INFO L124 PetriNetUnfolderBase]: 6105/10393 cut-off events. [2024-06-27 17:53:52,070 INFO L125 PetriNetUnfolderBase]: For 875689/875825 co-relation queries the response was YES. [2024-06-27 17:53:52,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74473 conditions, 10393 events. 6105/10393 cut-off events. For 875689/875825 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 80420 event pairs, 2057 based on Foata normal form. 19/9962 useless extension candidates. Maximal degree in co-relation 74294. Up to 8513 conditions per place. [2024-06-27 17:53:52,206 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 267 selfloop transitions, 271 changer transitions 0/553 dead transitions. [2024-06-27 17:53:52,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 553 transitions, 10548 flow [2024-06-27 17:53:52,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:53:52,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:53:52,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 17:53:52,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-06-27 17:53:52,207 INFO L175 Difference]: Start difference. First operand has 400 places, 529 transitions, 8772 flow. Second operand 8 states and 228 transitions. [2024-06-27 17:53:52,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 553 transitions, 10548 flow [2024-06-27 17:53:57,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 553 transitions, 10008 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:57,507 INFO L231 Difference]: Finished difference. Result has 404 places, 529 transitions, 8780 flow [2024-06-27 17:53:57,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8232, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8780, PETRI_PLACES=404, PETRI_TRANSITIONS=529} [2024-06-27 17:53:57,508 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 354 predicate places. [2024-06-27 17:53:57,508 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 529 transitions, 8780 flow [2024-06-27 17:53:57,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:57,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:57,508 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] [2024-06-27 17:53:57,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 17:53:57,508 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:57,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:57,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1836763939, now seen corresponding path program 7 times [2024-06-27 17:53:57,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:57,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987898693] [2024-06-27 17:53:57,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:57,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:57,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:57,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987898693] [2024-06-27 17:53:57,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987898693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:57,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:57,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:53:57,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584931756] [2024-06-27 17:53:57,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:57,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:53:57,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:57,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:53:57,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:53:57,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:53:57,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 529 transitions, 8780 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:57,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:57,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:53:57,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:59,880 INFO L124 PetriNetUnfolderBase]: 6119/10421 cut-off events. [2024-06-27 17:53:59,880 INFO L125 PetriNetUnfolderBase]: For 885206/885271 co-relation queries the response was YES. [2024-06-27 17:53:59,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74734 conditions, 10421 events. 6119/10421 cut-off events. For 885206/885271 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 80541 event pairs, 2015 based on Foata normal form. 1/9933 useless extension candidates. Maximal degree in co-relation 74554. Up to 9183 conditions per place. [2024-06-27 17:54:00,007 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 489 selfloop transitions, 49 changer transitions 0/553 dead transitions. [2024-06-27 17:54:00,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 553 transitions, 10021 flow [2024-06-27 17:54:00,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:54:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:54:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 17:54:00,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760869565217391 [2024-06-27 17:54:00,009 INFO L175 Difference]: Start difference. First operand has 404 places, 529 transitions, 8780 flow. Second operand 8 states and 212 transitions. [2024-06-27 17:54:00,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 553 transitions, 10021 flow [2024-06-27 17:54:06,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 553 transitions, 9565 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:54:06,025 INFO L231 Difference]: Finished difference. Result has 406 places, 535 transitions, 8555 flow [2024-06-27 17:54:06,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8333, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8555, PETRI_PLACES=406, PETRI_TRANSITIONS=535} [2024-06-27 17:54:06,026 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 356 predicate places. [2024-06-27 17:54:06,026 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 535 transitions, 8555 flow [2024-06-27 17:54:06,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:06,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:06,027 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] [2024-06-27 17:54:06,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 17:54:06,027 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:06,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:06,027 INFO L85 PathProgramCache]: Analyzing trace with hash -263844463, now seen corresponding path program 8 times [2024-06-27 17:54:06,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:06,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262255084] [2024-06-27 17:54:06,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:06,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:06,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:06,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262255084] [2024-06-27 17:54:06,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262255084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:06,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:06,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:54:06,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896951091] [2024-06-27 17:54:06,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:06,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:54:06,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:06,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:54:06,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:54:06,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:54:06,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 535 transitions, 8555 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:06,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:06,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:54:06,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:08,446 INFO L124 PetriNetUnfolderBase]: 6187/10488 cut-off events. [2024-06-27 17:54:08,447 INFO L125 PetriNetUnfolderBase]: For 941864/942002 co-relation queries the response was YES. [2024-06-27 17:54:08,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75683 conditions, 10488 events. 6187/10488 cut-off events. For 941864/942002 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 80765 event pairs, 2030 based on Foata normal form. 19/10036 useless extension candidates. Maximal degree in co-relation 75502. Up to 8583 conditions per place. [2024-06-27 17:54:08,573 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 268 selfloop transitions, 294 changer transitions 0/577 dead transitions. [2024-06-27 17:54:08,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 577 transitions, 11243 flow [2024-06-27 17:54:08,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:54:08,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:54:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 17:54:08,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-06-27 17:54:08,574 INFO L175 Difference]: Start difference. First operand has 406 places, 535 transitions, 8555 flow. Second operand 8 states and 228 transitions. [2024-06-27 17:54:08,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 577 transitions, 11243 flow [2024-06-27 17:54:14,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 577 transitions, 11111 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 17:54:14,289 INFO L231 Difference]: Finished difference. Result has 409 places, 554 transitions, 9437 flow [2024-06-27 17:54:14,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8423, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9437, PETRI_PLACES=409, PETRI_TRANSITIONS=554} [2024-06-27 17:54:14,290 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 359 predicate places. [2024-06-27 17:54:14,290 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 554 transitions, 9437 flow [2024-06-27 17:54:14,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:14,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:14,290 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] [2024-06-27 17:54:14,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 17:54:14,290 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:14,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:14,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1532682333, now seen corresponding path program 9 times [2024-06-27 17:54:14,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:14,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636942021] [2024-06-27 17:54:14,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:14,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:14,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:14,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636942021] [2024-06-27 17:54:14,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636942021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:14,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:14,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:54:14,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113002553] [2024-06-27 17:54:14,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:14,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:54:14,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:14,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:54:14,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:54:14,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:54:14,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 554 transitions, 9437 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:14,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:14,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:54:14,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:16,759 INFO L124 PetriNetUnfolderBase]: 6184/10514 cut-off events. [2024-06-27 17:54:16,759 INFO L125 PetriNetUnfolderBase]: For 954017/954153 co-relation queries the response was YES. [2024-06-27 17:54:16,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76552 conditions, 10514 events. 6184/10514 cut-off events. For 954017/954153 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 81259 event pairs, 2064 based on Foata normal form. 19/10067 useless extension candidates. Maximal degree in co-relation 76370. Up to 8581 conditions per place. [2024-06-27 17:54:16,887 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 269 selfloop transitions, 293 changer transitions 0/577 dead transitions. [2024-06-27 17:54:16,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 577 transitions, 11715 flow [2024-06-27 17:54:16,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:54:16,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:54:16,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 17:54:16,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-06-27 17:54:16,888 INFO L175 Difference]: Start difference. First operand has 409 places, 554 transitions, 9437 flow. Second operand 8 states and 228 transitions. [2024-06-27 17:54:16,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 577 transitions, 11715 flow [2024-06-27 17:54:22,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 577 transitions, 11240 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-27 17:54:22,640 INFO L231 Difference]: Finished difference. Result has 415 places, 554 transitions, 9554 flow [2024-06-27 17:54:22,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8962, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9554, PETRI_PLACES=415, PETRI_TRANSITIONS=554} [2024-06-27 17:54:22,641 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 365 predicate places. [2024-06-27 17:54:22,641 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 554 transitions, 9554 flow [2024-06-27 17:54:22,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:22,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:22,641 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] [2024-06-27 17:54:22,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 17:54:22,641 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:22,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:22,641 INFO L85 PathProgramCache]: Analyzing trace with hash 310294783, now seen corresponding path program 10 times [2024-06-27 17:54:22,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:22,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331744429] [2024-06-27 17:54:22,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:22,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:22,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:22,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331744429] [2024-06-27 17:54:22,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331744429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:22,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:22,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:54:22,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828987350] [2024-06-27 17:54:22,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:22,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:54:22,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:22,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:54:22,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:54:22,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:54:22,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 554 transitions, 9554 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:22,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:22,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:54:22,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:25,203 INFO L124 PetriNetUnfolderBase]: 6201/10522 cut-off events. [2024-06-27 17:54:25,204 INFO L125 PetriNetUnfolderBase]: For 976720/976833 co-relation queries the response was YES. [2024-06-27 17:54:25,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76865 conditions, 10522 events. 6201/10522 cut-off events. For 976720/976833 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 81090 event pairs, 2021 based on Foata normal form. 32/10053 useless extension candidates. Maximal degree in co-relation 76682. Up to 9007 conditions per place. [2024-06-27 17:54:25,334 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 391 selfloop transitions, 180 changer transitions 0/586 dead transitions. [2024-06-27 17:54:25,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 586 transitions, 11962 flow [2024-06-27 17:54:25,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:54:25,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:54:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 291 transitions. [2024-06-27 17:54:25,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575098814229249 [2024-06-27 17:54:25,335 INFO L175 Difference]: Start difference. First operand has 415 places, 554 transitions, 9554 flow. Second operand 11 states and 291 transitions. [2024-06-27 17:54:25,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 586 transitions, 11962 flow [2024-06-27 17:54:31,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 586 transitions, 11504 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 17:54:31,483 INFO L231 Difference]: Finished difference. Result has 423 places, 560 transitions, 9558 flow [2024-06-27 17:54:31,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9104, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9558, PETRI_PLACES=423, PETRI_TRANSITIONS=560} [2024-06-27 17:54:31,484 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 373 predicate places. [2024-06-27 17:54:31,484 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 560 transitions, 9558 flow [2024-06-27 17:54:31,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:31,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:31,484 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] [2024-06-27 17:54:31,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 17:54:31,484 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:31,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:31,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1832002339, now seen corresponding path program 10 times [2024-06-27 17:54:31,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:31,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509753251] [2024-06-27 17:54:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:31,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:31,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:31,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509753251] [2024-06-27 17:54:31,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509753251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:31,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:31,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:54:31,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315898111] [2024-06-27 17:54:31,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:31,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:54:31,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:31,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:54:31,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:54:31,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 17:54:31,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 560 transitions, 9558 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:31,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:31,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 17:54:31,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:33,849 INFO L124 PetriNetUnfolderBase]: 6198/10509 cut-off events. [2024-06-27 17:54:33,850 INFO L125 PetriNetUnfolderBase]: For 989259/989404 co-relation queries the response was YES. [2024-06-27 17:54:33,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76484 conditions, 10509 events. 6198/10509 cut-off events. For 989259/989404 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 81097 event pairs, 2032 based on Foata normal form. 20/10057 useless extension candidates. Maximal degree in co-relation 76300. Up to 8593 conditions per place. [2024-06-27 17:54:33,982 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 262 selfloop transitions, 305 changer transitions 0/582 dead transitions. [2024-06-27 17:54:33,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 582 transitions, 11640 flow [2024-06-27 17:54:33,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:54:33,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:54:33,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 17:54:33,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168478260869565 [2024-06-27 17:54:33,983 INFO L175 Difference]: Start difference. First operand has 423 places, 560 transitions, 9558 flow. Second operand 8 states and 227 transitions. [2024-06-27 17:54:33,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 582 transitions, 11640 flow [2024-06-27 17:54:39,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 582 transitions, 11243 flow, removed 41 selfloop flow, removed 6 redundant places.