./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe012_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe012_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe012_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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 18:13:07,847 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 18:13:07,885 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 18:13:07,888 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 18:13:07,888 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 18:13:07,927 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 18:13:07,932 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 18:13:07,933 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 18:13:07,934 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 18:13:07,937 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 18:13:07,937 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 18:13:07,951 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 18:13:07,953 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 18:13:07,953 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 18:13:07,953 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 18:13:07,954 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 18:13:07,955 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 18:13:07,955 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 18:13:07,955 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 18:13:07,955 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 18:13:07,956 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 18:13:07,957 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 18:13:07,957 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 18:13:07,957 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 18:13:07,957 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 18:13:07,957 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 18:13:07,958 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 18:13:07,958 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 18:13:07,958 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 18:13:07,959 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 18:13:07,959 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 18:13:07,960 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 18:13:07,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:13:07,960 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 18:13:07,960 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 18:13:07,960 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 18:13:07,961 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 18:13:07,961 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 18:13:07,961 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 18:13:07,961 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 18:13:07,961 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 18:13:07,962 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 18:13:07,962 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 18:13:07,962 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 18:13:08,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 18:13:08,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 18:13:08,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 18:13:08,194 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 18:13:08,194 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 18:13:08,195 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe012_tso.yml/witness.yml [2024-06-21 18:13:08,294 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 18:13:08,295 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 18:13:08,296 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_tso.i [2024-06-21 18:13:09,235 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 18:13:09,498 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 18:13:09,507 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_tso.i [2024-06-21 18:13:09,521 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e46f311a3/ad6dd2b1e058427aacac3d8aae40ad1e/FLAG7fe596328 [2024-06-21 18:13:09,533 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e46f311a3/ad6dd2b1e058427aacac3d8aae40ad1e [2024-06-21 18:13:09,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 18:13:09,535 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 18:13:09,538 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 18:13:09,538 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 18:13:09,542 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 18:13:09,543 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:13:08" (1/2) ... [2024-06-21 18:13:09,544 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c1b5361 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:09, skipping insertion in model container [2024-06-21 18:13:09,544 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:13:08" (1/2) ... [2024-06-21 18:13:09,545 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7fc385ed and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:09, skipping insertion in model container [2024-06-21 18:13:09,547 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:13:09" (2/2) ... [2024-06-21 18:13:09,547 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c1b5361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:09, skipping insertion in model container [2024-06-21 18:13:09,547 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:13:09" (2/2) ... [2024-06-21 18:13:09,548 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 18:13:09,573 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 18:13:09,576 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ! multithreaded || (((0LL - (long long )__unbuffered_p0_EAX) + (long long )z >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) [2024-06-21 18:13:09,577 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ! multithreaded || (((0LL - (long long )__unbuffered_p0_EAX) + (long long )z >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) [2024-06-21 18:13:09,577 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ! multithreaded || (((0LL - (long long )__unbuffered_p0_EAX) + (long long )z >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) [2024-06-21 18:13:09,577 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 18:13:09,577 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-21 18:13:09,613 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 18:13:09,896 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:13:09,906 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 18:13:10,007 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:13:10,042 INFO L206 MainTranslator]: Completed translation [2024-06-21 18:13:10,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:10 WrapperNode [2024-06-21 18:13:10,043 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 18:13:10,044 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 18:13:10,045 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 18:13:10,045 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 18:13:10,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:10" (1/1) ... [2024-06-21 18:13:10,075 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:10" (1/1) ... [2024-06-21 18:13:10,100 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-06-21 18:13:10,101 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 18:13:10,102 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 18:13:10,102 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 18:13:10,102 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 18:13:10,111 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:10" (1/1) ... [2024-06-21 18:13:10,112 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:10" (1/1) ... [2024-06-21 18:13:10,117 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:10" (1/1) ... [2024-06-21 18:13:10,133 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]. [2024-06-21 18:13:10,133 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:10" (1/1) ... [2024-06-21 18:13:10,134 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:10" (1/1) ... [2024-06-21 18:13:10,137 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:10" (1/1) ... [2024-06-21 18:13:10,138 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:10" (1/1) ... [2024-06-21 18:13:10,139 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:10" (1/1) ... [2024-06-21 18:13:10,140 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:10" (1/1) ... [2024-06-21 18:13:10,141 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 18:13:10,142 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 18:13:10,142 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 18:13:10,142 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 18:13:10,143 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:10" (1/1) ... [2024-06-21 18:13:10,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:13:10,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 18:13:10,170 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) [2024-06-21 18:13:10,179 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 [2024-06-21 18:13:10,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 18:13:10,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 18:13:10,209 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 18:13:10,209 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 18:13:10,210 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 18:13:10,210 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 18:13:10,210 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 18:13:10,210 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 18:13:10,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 18:13:10,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 18:13:10,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 18:13:10,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 18:13:10,212 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 18:13:10,305 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 18:13:10,307 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 18:13:10,460 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 18:13:10,460 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 18:13:10,540 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 18:13:10,540 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 18:13:10,540 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:13:10 BoogieIcfgContainer [2024-06-21 18:13:10,540 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 18:13:10,542 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 18:13:10,542 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 18:13:10,544 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 18:13:10,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:13:08" (1/4) ... [2024-06-21 18:13:10,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac0d9aa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:13:10, skipping insertion in model container [2024-06-21 18:13:10,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 06:13:09" (2/4) ... [2024-06-21 18:13:10,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac0d9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:13:10, skipping insertion in model container [2024-06-21 18:13:10,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:10" (3/4) ... [2024-06-21 18:13:10,546 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac0d9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:13:10, skipping insertion in model container [2024-06-21 18:13:10,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:13:10" (4/4) ... [2024-06-21 18:13:10,546 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_tso.i [2024-06-21 18:13:10,560 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 18:13:10,561 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 18:13:10,561 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 18:13:10,610 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 18:13:10,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 18:13:10,651 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 18:13:10,653 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:13:10,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 18:13:10,655 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 18:13:10,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 18:13:10,667 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 18:13:10,674 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;@621b3cad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 18:13:10,674 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 18:13:10,679 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 18:13:10,679 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 18:13:10,679 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:13:10,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:10,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 18:13:10,681 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:10,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:10,686 INFO L85 PathProgramCache]: Analyzing trace with hash 219098506, now seen corresponding path program 1 times [2024-06-21 18:13:10,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:10,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292571202] [2024-06-21 18:13:10,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:10,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:11,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:11,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292571202] [2024-06-21 18:13:11,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292571202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:11,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:11,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 18:13:11,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550919455] [2024-06-21 18:13:11,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:11,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 18:13:11,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:11,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 18:13:11,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 18:13:11,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 40 [2024-06-21 18:13:11,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:11,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:11,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 40 [2024-06-21 18:13:11,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:11,161 INFO L124 PetriNetUnfolderBase]: 150/301 cut-off events. [2024-06-21 18:13:11,161 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-06-21 18:13:11,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 301 events. 150/301 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1468 event pairs, 91 based on Foata normal form. 2/280 useless extension candidates. Maximal degree in co-relation 573. Up to 234 conditions per place. [2024-06-21 18:13:11,166 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 21 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-06-21 18:13:11,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 134 flow [2024-06-21 18:13:11,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:13:11,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:13:11,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-06-21 18:13:11,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.725 [2024-06-21 18:13:11,178 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 87 transitions. [2024-06-21 18:13:11,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 134 flow [2024-06-21 18:13:11,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 130 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:11,185 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 87 flow [2024-06-21 18:13:11,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2024-06-21 18:13:11,190 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2024-06-21 18:13:11,190 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 87 flow [2024-06-21 18:13:11,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:11,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:11,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:11,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 18:13:11,192 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:11,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:11,193 INFO L85 PathProgramCache]: Analyzing trace with hash -2007204815, now seen corresponding path program 1 times [2024-06-21 18:13:11,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:11,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335150398] [2024-06-21 18:13:11,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:11,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:11,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:11,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335150398] [2024-06-21 18:13:11,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335150398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:11,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:11,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:13:11,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968663175] [2024-06-21 18:13:11,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:11,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:13:11,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:11,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:13:11,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:13:11,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 40 [2024-06-21 18:13:11,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:11,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:11,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 40 [2024-06-21 18:13:11,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:11,512 INFO L124 PetriNetUnfolderBase]: 246/508 cut-off events. [2024-06-21 18:13:11,513 INFO L125 PetriNetUnfolderBase]: For 64/67 co-relation queries the response was YES. [2024-06-21 18:13:11,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1075 conditions, 508 events. 246/508 cut-off events. For 64/67 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2633 event pairs, 105 based on Foata normal form. 4/488 useless extension candidates. Maximal degree in co-relation 1063. Up to 387 conditions per place. [2024-06-21 18:13:11,517 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 30 selfloop transitions, 7 changer transitions 0/49 dead transitions. [2024-06-21 18:13:11,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 209 flow [2024-06-21 18:13:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:11,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:11,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-06-21 18:13:11,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.70625 [2024-06-21 18:13:11,520 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 87 flow. Second operand 4 states and 113 transitions. [2024-06-21 18:13:11,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 209 flow [2024-06-21 18:13:11,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 18:13:11,522 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 138 flow [2024-06-21 18:13:11,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2024-06-21 18:13:11,532 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-06-21 18:13:11,533 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 138 flow [2024-06-21 18:13:11,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:11,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:11,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:11,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 18:13:11,535 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:11,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:11,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2113468487, now seen corresponding path program 1 times [2024-06-21 18:13:11,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:11,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308697322] [2024-06-21 18:13:11,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:11,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:11,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:11,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308697322] [2024-06-21 18:13:11,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308697322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:11,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:11,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:13:11,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954938368] [2024-06-21 18:13:11,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:11,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:13:11,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:11,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:13:11,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:13:11,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 40 [2024-06-21 18:13:11,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 138 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) [2024-06-21 18:13:11,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:11,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 40 [2024-06-21 18:13:11,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:11,877 INFO L124 PetriNetUnfolderBase]: 302/603 cut-off events. [2024-06-21 18:13:11,878 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2024-06-21 18:13:11,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1480 conditions, 603 events. 302/603 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3244 event pairs, 130 based on Foata normal form. 4/592 useless extension candidates. Maximal degree in co-relation 1465. Up to 453 conditions per place. [2024-06-21 18:13:11,883 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 42 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2024-06-21 18:13:11,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 62 transitions, 313 flow [2024-06-21 18:13:11,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:11,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:11,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-21 18:13:11,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-21 18:13:11,888 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 138 flow. Second operand 5 states and 135 transitions. [2024-06-21 18:13:11,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 62 transitions, 313 flow [2024-06-21 18:13:11,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 62 transitions, 311 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 18:13:11,892 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 214 flow [2024-06-21 18:13:11,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-06-21 18:13:11,894 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-06-21 18:13:11,894 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 214 flow [2024-06-21 18:13:11,894 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) [2024-06-21 18:13:11,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:11,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:11,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 18:13:11,895 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:11,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:11,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1651455102, now seen corresponding path program 1 times [2024-06-21 18:13:11,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:11,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695004143] [2024-06-21 18:13:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:11,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:12,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:12,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695004143] [2024-06-21 18:13:12,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695004143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:12,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:12,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:12,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360461059] [2024-06-21 18:13:12,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:12,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:12,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:12,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:12,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:12,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 40 [2024-06-21 18:13:12,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 214 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) [2024-06-21 18:13:12,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:12,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 40 [2024-06-21 18:13:12,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:12,232 INFO L124 PetriNetUnfolderBase]: 395/800 cut-off events. [2024-06-21 18:13:12,233 INFO L125 PetriNetUnfolderBase]: For 767/785 co-relation queries the response was YES. [2024-06-21 18:13:12,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2163 conditions, 800 events. 395/800 cut-off events. For 767/785 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4418 event pairs, 87 based on Foata normal form. 11/786 useless extension candidates. Maximal degree in co-relation 2143. Up to 517 conditions per place. [2024-06-21 18:13:12,238 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 33 selfloop transitions, 13 changer transitions 0/60 dead transitions. [2024-06-21 18:13:12,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 344 flow [2024-06-21 18:13:12,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:12,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-06-21 18:13:12,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.69375 [2024-06-21 18:13:12,239 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 214 flow. Second operand 4 states and 111 transitions. [2024-06-21 18:13:12,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 344 flow [2024-06-21 18:13:12,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 342 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 18:13:12,243 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 266 flow [2024-06-21 18:13:12,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=266, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-06-21 18:13:12,244 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-06-21 18:13:12,244 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 266 flow [2024-06-21 18:13:12,244 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) [2024-06-21 18:13:12,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:12,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:12,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 18:13:12,245 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:12,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:12,245 INFO L85 PathProgramCache]: Analyzing trace with hash 2136043692, now seen corresponding path program 2 times [2024-06-21 18:13:12,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:12,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505413432] [2024-06-21 18:13:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:12,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:12,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:12,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505413432] [2024-06-21 18:13:12,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505413432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:12,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:12,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:12,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681905168] [2024-06-21 18:13:12,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:12,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:12,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:12,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:12,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:12,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 40 [2024-06-21 18:13:12,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 266 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) [2024-06-21 18:13:12,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:12,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 40 [2024-06-21 18:13:12,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:12,488 INFO L124 PetriNetUnfolderBase]: 387/788 cut-off events. [2024-06-21 18:13:12,488 INFO L125 PetriNetUnfolderBase]: For 1332/1352 co-relation queries the response was YES. [2024-06-21 18:13:12,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2356 conditions, 788 events. 387/788 cut-off events. For 1332/1352 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4331 event pairs, 85 based on Foata normal form. 13/779 useless extension candidates. Maximal degree in co-relation 2333. Up to 485 conditions per place. [2024-06-21 18:13:12,493 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 38 selfloop transitions, 15 changer transitions 0/67 dead transitions. [2024-06-21 18:13:12,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 67 transitions, 426 flow [2024-06-21 18:13:12,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:12,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:12,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-21 18:13:12,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-21 18:13:12,494 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 266 flow. Second operand 5 states and 136 transitions. [2024-06-21 18:13:12,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 67 transitions, 426 flow [2024-06-21 18:13:12,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 396 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:12,497 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 292 flow [2024-06-21 18:13:12,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=292, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2024-06-21 18:13:12,498 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 17 predicate places. [2024-06-21 18:13:12,498 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 292 flow [2024-06-21 18:13:12,499 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) [2024-06-21 18:13:12,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:12,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:12,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 18:13:12,499 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:12,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:12,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1697966176, now seen corresponding path program 1 times [2024-06-21 18:13:12,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:12,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830194691] [2024-06-21 18:13:12,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:12,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:12,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:12,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830194691] [2024-06-21 18:13:12,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830194691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:12,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:12,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:12,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276120134] [2024-06-21 18:13:12,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:12,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:12,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:12,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:12,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:12,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:12,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 292 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:12,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:12,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:12,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:12,752 INFO L124 PetriNetUnfolderBase]: 449/886 cut-off events. [2024-06-21 18:13:12,752 INFO L125 PetriNetUnfolderBase]: For 1290/1294 co-relation queries the response was YES. [2024-06-21 18:13:12,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2621 conditions, 886 events. 449/886 cut-off events. For 1290/1294 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5039 event pairs, 51 based on Foata normal form. 9/880 useless extension candidates. Maximal degree in co-relation 2597. Up to 529 conditions per place. [2024-06-21 18:13:12,757 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 51 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-21 18:13:12,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 74 transitions, 494 flow [2024-06-21 18:13:12,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:12,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-21 18:13:12,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.67 [2024-06-21 18:13:12,758 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 292 flow. Second operand 5 states and 134 transitions. [2024-06-21 18:13:12,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 74 transitions, 494 flow [2024-06-21 18:13:12,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 74 transitions, 458 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:12,762 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 339 flow [2024-06-21 18:13:12,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=339, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2024-06-21 18:13:12,762 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-21 18:13:12,762 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 339 flow [2024-06-21 18:13:12,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:12,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:12,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:12,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 18:13:12,763 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:12,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:12,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1792851286, now seen corresponding path program 2 times [2024-06-21 18:13:12,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:12,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724448554] [2024-06-21 18:13:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:12,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:12,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:12,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724448554] [2024-06-21 18:13:12,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724448554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:12,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:12,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:12,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412270372] [2024-06-21 18:13:12,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:12,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:12,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:12,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:12,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:12,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:12,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:12,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:12,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:12,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:12,994 INFO L124 PetriNetUnfolderBase]: 473/950 cut-off events. [2024-06-21 18:13:12,994 INFO L125 PetriNetUnfolderBase]: For 1585/1589 co-relation queries the response was YES. [2024-06-21 18:13:12,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2890 conditions, 950 events. 473/950 cut-off events. For 1585/1589 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5573 event pairs, 49 based on Foata normal form. 9/944 useless extension candidates. Maximal degree in co-relation 2863. Up to 447 conditions per place. [2024-06-21 18:13:13,001 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 55 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2024-06-21 18:13:13,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 81 transitions, 559 flow [2024-06-21 18:13:13,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:13,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 18:13:13,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-21 18:13:13,003 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 339 flow. Second operand 6 states and 155 transitions. [2024-06-21 18:13:13,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 81 transitions, 559 flow [2024-06-21 18:13:13,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 81 transitions, 553 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-21 18:13:13,007 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 397 flow [2024-06-21 18:13:13,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=397, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2024-06-21 18:13:13,008 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-21 18:13:13,008 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 397 flow [2024-06-21 18:13:13,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:13,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:13,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:13,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 18:13:13,009 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:13,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:13,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1183321846, now seen corresponding path program 3 times [2024-06-21 18:13:13,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:13,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389801097] [2024-06-21 18:13:13,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:13,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:13,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:13,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389801097] [2024-06-21 18:13:13,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389801097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:13,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:13,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:13,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621555128] [2024-06-21 18:13:13,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:13,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:13,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:13,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:13,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:13,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:13,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 397 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:13,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:13,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:13,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:13,254 INFO L124 PetriNetUnfolderBase]: 461/930 cut-off events. [2024-06-21 18:13:13,254 INFO L125 PetriNetUnfolderBase]: For 2159/2163 co-relation queries the response was YES. [2024-06-21 18:13:13,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2992 conditions, 930 events. 461/930 cut-off events. For 2159/2163 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5454 event pairs, 45 based on Foata normal form. 9/928 useless extension candidates. Maximal degree in co-relation 2961. Up to 443 conditions per place. [2024-06-21 18:13:13,260 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 54 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2024-06-21 18:13:13,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 79 transitions, 571 flow [2024-06-21 18:13:13,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:13,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 18:13:13,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-21 18:13:13,262 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 397 flow. Second operand 6 states and 153 transitions. [2024-06-21 18:13:13,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 79 transitions, 571 flow [2024-06-21 18:13:13,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 79 transitions, 554 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:13,270 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 400 flow [2024-06-21 18:13:13,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=400, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2024-06-21 18:13:13,273 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-21 18:13:13,273 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 400 flow [2024-06-21 18:13:13,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:13,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:13,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:13,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 18:13:13,274 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:13,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:13,275 INFO L85 PathProgramCache]: Analyzing trace with hash -646658297, now seen corresponding path program 1 times [2024-06-21 18:13:13,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:13,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976736059] [2024-06-21 18:13:13,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:13,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:13,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:13,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976736059] [2024-06-21 18:13:13,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976736059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:13,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:13,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:13:13,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151293626] [2024-06-21 18:13:13,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:13,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:13:13,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:13,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:13:13,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:13:13,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 40 [2024-06-21 18:13:13,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 57 transitions, 400 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:13,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:13,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 40 [2024-06-21 18:13:13,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:13,482 INFO L124 PetriNetUnfolderBase]: 420/860 cut-off events. [2024-06-21 18:13:13,482 INFO L125 PetriNetUnfolderBase]: For 2268/2271 co-relation queries the response was YES. [2024-06-21 18:13:13,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2840 conditions, 860 events. 420/860 cut-off events. For 2268/2271 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5022 event pairs, 126 based on Foata normal form. 5/839 useless extension candidates. Maximal degree in co-relation 2808. Up to 639 conditions per place. [2024-06-21 18:13:13,488 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 50 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2024-06-21 18:13:13,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 73 transitions, 595 flow [2024-06-21 18:13:13,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:13,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:13,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-06-21 18:13:13,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-06-21 18:13:13,489 INFO L175 Difference]: Start difference. First operand has 72 places, 57 transitions, 400 flow. Second operand 4 states and 106 transitions. [2024-06-21 18:13:13,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 73 transitions, 595 flow [2024-06-21 18:13:13,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 73 transitions, 547 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:13,496 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 438 flow [2024-06-21 18:13:13,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=438, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-06-21 18:13:13,497 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-21 18:13:13,497 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 438 flow [2024-06-21 18:13:13,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:13,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:13,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:13,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 18:13:13,498 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:13,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:13,498 INFO L85 PathProgramCache]: Analyzing trace with hash -26288904, now seen corresponding path program 1 times [2024-06-21 18:13:13,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:13,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452282791] [2024-06-21 18:13:13,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:13,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:13,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:13,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:13,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452282791] [2024-06-21 18:13:13,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452282791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:13,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:13,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:13,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434051675] [2024-06-21 18:13:13,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:13,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:13,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:13,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:13,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:13,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 40 [2024-06-21 18:13:13,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 438 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) [2024-06-21 18:13:13,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:13,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 40 [2024-06-21 18:13:13,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:13,752 INFO L124 PetriNetUnfolderBase]: 431/874 cut-off events. [2024-06-21 18:13:13,752 INFO L125 PetriNetUnfolderBase]: For 2708/2716 co-relation queries the response was YES. [2024-06-21 18:13:13,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2872 conditions, 874 events. 431/874 cut-off events. For 2708/2716 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5213 event pairs, 99 based on Foata normal form. 14/865 useless extension candidates. Maximal degree in co-relation 2839. Up to 594 conditions per place. [2024-06-21 18:13:13,757 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 43 selfloop transitions, 13 changer transitions 0/72 dead transitions. [2024-06-21 18:13:13,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 72 transitions, 574 flow [2024-06-21 18:13:13,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:13,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:13,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-21 18:13:13,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-06-21 18:13:13,759 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 438 flow. Second operand 4 states and 105 transitions. [2024-06-21 18:13:13,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 72 transitions, 574 flow [2024-06-21 18:13:13,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 72 transitions, 572 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 18:13:13,765 INFO L231 Difference]: Finished difference. Result has 76 places, 64 transitions, 478 flow [2024-06-21 18:13:13,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=478, PETRI_PLACES=76, PETRI_TRANSITIONS=64} [2024-06-21 18:13:13,765 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-06-21 18:13:13,765 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 64 transitions, 478 flow [2024-06-21 18:13:13,766 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) [2024-06-21 18:13:13,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:13,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:13,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 18:13:13,766 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:13,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:13,767 INFO L85 PathProgramCache]: Analyzing trace with hash -26276814, now seen corresponding path program 2 times [2024-06-21 18:13:13,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:13,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366303275] [2024-06-21 18:13:13,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:13,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:13,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:13,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366303275] [2024-06-21 18:13:13,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366303275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:13,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:13,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:13,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132274668] [2024-06-21 18:13:13,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:13,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:13,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:13,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:13,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:13,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 40 [2024-06-21 18:13:13,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 64 transitions, 478 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) [2024-06-21 18:13:13,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:13,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 40 [2024-06-21 18:13:13,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:13,950 INFO L124 PetriNetUnfolderBase]: 418/855 cut-off events. [2024-06-21 18:13:13,951 INFO L125 PetriNetUnfolderBase]: For 3116/3124 co-relation queries the response was YES. [2024-06-21 18:13:13,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2887 conditions, 855 events. 418/855 cut-off events. For 3116/3124 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5101 event pairs, 95 based on Foata normal form. 14/848 useless extension candidates. Maximal degree in co-relation 2851. Up to 561 conditions per place. [2024-06-21 18:13:13,956 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 45 selfloop transitions, 14 changer transitions 0/75 dead transitions. [2024-06-21 18:13:13,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 75 transitions, 620 flow [2024-06-21 18:13:13,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:13,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-21 18:13:13,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-21 18:13:13,957 INFO L175 Difference]: Start difference. First operand has 76 places, 64 transitions, 478 flow. Second operand 5 states and 126 transitions. [2024-06-21 18:13:13,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 75 transitions, 620 flow [2024-06-21 18:13:13,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 75 transitions, 594 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:13,963 INFO L231 Difference]: Finished difference. Result has 79 places, 64 transitions, 484 flow [2024-06-21 18:13:13,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=484, PETRI_PLACES=79, PETRI_TRANSITIONS=64} [2024-06-21 18:13:13,964 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-06-21 18:13:13,964 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 64 transitions, 484 flow [2024-06-21 18:13:13,964 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) [2024-06-21 18:13:13,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:13,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:13,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 18:13:13,965 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:13,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:13,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1666267724, now seen corresponding path program 1 times [2024-06-21 18:13:13,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:13,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260098183] [2024-06-21 18:13:13,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:13,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:14,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:14,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260098183] [2024-06-21 18:13:14,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260098183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:14,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:14,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:14,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179649667] [2024-06-21 18:13:14,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:14,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:14,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:14,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:14,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:14,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 40 [2024-06-21 18:13:14,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 64 transitions, 484 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) [2024-06-21 18:13:14,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:14,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 40 [2024-06-21 18:13:14,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:14,195 INFO L124 PetriNetUnfolderBase]: 425/907 cut-off events. [2024-06-21 18:13:14,195 INFO L125 PetriNetUnfolderBase]: For 2996/2999 co-relation queries the response was YES. [2024-06-21 18:13:14,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3052 conditions, 907 events. 425/907 cut-off events. For 2996/2999 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5575 event pairs, 100 based on Foata normal form. 7/892 useless extension candidates. Maximal degree in co-relation 3015. Up to 592 conditions per place. [2024-06-21 18:13:14,202 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 54 selfloop transitions, 20 changer transitions 0/87 dead transitions. [2024-06-21 18:13:14,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 87 transitions, 724 flow [2024-06-21 18:13:14,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:14,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:14,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 18:13:14,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-06-21 18:13:14,204 INFO L175 Difference]: Start difference. First operand has 79 places, 64 transitions, 484 flow. Second operand 6 states and 159 transitions. [2024-06-21 18:13:14,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 87 transitions, 724 flow [2024-06-21 18:13:14,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 694 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:14,211 INFO L231 Difference]: Finished difference. Result has 82 places, 68 transitions, 531 flow [2024-06-21 18:13:14,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=531, PETRI_PLACES=82, PETRI_TRANSITIONS=68} [2024-06-21 18:13:14,212 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-06-21 18:13:14,212 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 68 transitions, 531 flow [2024-06-21 18:13:14,212 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) [2024-06-21 18:13:14,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:14,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:14,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 18:13:14,213 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:14,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:14,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1666387880, now seen corresponding path program 1 times [2024-06-21 18:13:14,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:14,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179333979] [2024-06-21 18:13:14,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:14,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:14,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:14,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179333979] [2024-06-21 18:13:14,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179333979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:14,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:14,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:14,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432798238] [2024-06-21 18:13:14,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:14,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:14,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:14,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:14,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:14,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:14,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 68 transitions, 531 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) [2024-06-21 18:13:14,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:14,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:14,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:14,411 INFO L124 PetriNetUnfolderBase]: 492/991 cut-off events. [2024-06-21 18:13:14,411 INFO L125 PetriNetUnfolderBase]: For 3229/3229 co-relation queries the response was YES. [2024-06-21 18:13:14,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3432 conditions, 991 events. 492/991 cut-off events. For 3229/3229 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5837 event pairs, 127 based on Foata normal form. 2/968 useless extension candidates. Maximal degree in co-relation 3394. Up to 742 conditions per place. [2024-06-21 18:13:14,418 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 71 selfloop transitions, 16 changer transitions 0/97 dead transitions. [2024-06-21 18:13:14,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 97 transitions, 864 flow [2024-06-21 18:13:14,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:14,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:14,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 18:13:14,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-21 18:13:14,419 INFO L175 Difference]: Start difference. First operand has 82 places, 68 transitions, 531 flow. Second operand 6 states and 152 transitions. [2024-06-21 18:13:14,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 97 transitions, 864 flow [2024-06-21 18:13:14,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 97 transitions, 812 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:14,429 INFO L231 Difference]: Finished difference. Result has 87 places, 78 transitions, 625 flow [2024-06-21 18:13:14,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=625, PETRI_PLACES=87, PETRI_TRANSITIONS=78} [2024-06-21 18:13:14,430 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 46 predicate places. [2024-06-21 18:13:14,430 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 78 transitions, 625 flow [2024-06-21 18:13:14,430 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) [2024-06-21 18:13:14,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:14,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:14,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 18:13:14,431 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:14,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:14,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1154295502, now seen corresponding path program 2 times [2024-06-21 18:13:14,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:14,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188917863] [2024-06-21 18:13:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:14,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:14,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:14,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188917863] [2024-06-21 18:13:14,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188917863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:14,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:14,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:14,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502389871] [2024-06-21 18:13:14,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:14,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:14,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:14,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:14,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:14,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 40 [2024-06-21 18:13:14,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 78 transitions, 625 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) [2024-06-21 18:13:14,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:14,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 40 [2024-06-21 18:13:14,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:14,671 INFO L124 PetriNetUnfolderBase]: 468/974 cut-off events. [2024-06-21 18:13:14,671 INFO L125 PetriNetUnfolderBase]: For 3874/3877 co-relation queries the response was YES. [2024-06-21 18:13:14,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3412 conditions, 974 events. 468/974 cut-off events. For 3874/3877 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5957 event pairs, 128 based on Foata normal form. 7/953 useless extension candidates. Maximal degree in co-relation 3371. Up to 688 conditions per place. [2024-06-21 18:13:14,678 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 56 selfloop transitions, 25 changer transitions 0/97 dead transitions. [2024-06-21 18:13:14,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 97 transitions, 868 flow [2024-06-21 18:13:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:14,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:14,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 18:13:14,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-21 18:13:14,679 INFO L175 Difference]: Start difference. First operand has 87 places, 78 transitions, 625 flow. Second operand 6 states and 154 transitions. [2024-06-21 18:13:14,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 97 transitions, 868 flow [2024-06-21 18:13:14,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 97 transitions, 842 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:14,686 INFO L231 Difference]: Finished difference. Result has 91 places, 83 transitions, 706 flow [2024-06-21 18:13:14,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=706, PETRI_PLACES=91, PETRI_TRANSITIONS=83} [2024-06-21 18:13:14,687 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-21 18:13:14,687 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 83 transitions, 706 flow [2024-06-21 18:13:14,687 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) [2024-06-21 18:13:14,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:14,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:14,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 18:13:14,688 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:14,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:14,688 INFO L85 PathProgramCache]: Analyzing trace with hash -807615612, now seen corresponding path program 2 times [2024-06-21 18:13:14,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:14,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658547977] [2024-06-21 18:13:14,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:14,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:14,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:14,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658547977] [2024-06-21 18:13:14,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658547977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:14,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:14,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:14,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819532465] [2024-06-21 18:13:14,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:14,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:14,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:14,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:14,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:14,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:14,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 83 transitions, 706 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) [2024-06-21 18:13:14,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:14,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:14,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:14,894 INFO L124 PetriNetUnfolderBase]: 521/1047 cut-off events. [2024-06-21 18:13:14,894 INFO L125 PetriNetUnfolderBase]: For 4526/4530 co-relation queries the response was YES. [2024-06-21 18:13:14,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3769 conditions, 1047 events. 521/1047 cut-off events. For 4526/4530 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6279 event pairs, 132 based on Foata normal form. 6/1027 useless extension candidates. Maximal degree in co-relation 3727. Up to 781 conditions per place. [2024-06-21 18:13:14,902 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 72 selfloop transitions, 18 changer transitions 0/100 dead transitions. [2024-06-21 18:13:14,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 100 transitions, 975 flow [2024-06-21 18:13:14,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:14,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:14,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 18:13:14,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-21 18:13:14,903 INFO L175 Difference]: Start difference. First operand has 91 places, 83 transitions, 706 flow. Second operand 5 states and 127 transitions. [2024-06-21 18:13:14,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 100 transitions, 975 flow [2024-06-21 18:13:14,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 100 transitions, 915 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:14,913 INFO L231 Difference]: Finished difference. Result has 94 places, 87 transitions, 729 flow [2024-06-21 18:13:14,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=729, PETRI_PLACES=94, PETRI_TRANSITIONS=87} [2024-06-21 18:13:14,913 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2024-06-21 18:13:14,913 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 729 flow [2024-06-21 18:13:14,914 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) [2024-06-21 18:13:14,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:14,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:14,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 18:13:14,914 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:14,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:14,915 INFO L85 PathProgramCache]: Analyzing trace with hash -807852948, now seen corresponding path program 3 times [2024-06-21 18:13:14,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:14,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967254191] [2024-06-21 18:13:14,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:14,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:14,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:14,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967254191] [2024-06-21 18:13:14,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967254191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:15,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:15,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:15,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593896972] [2024-06-21 18:13:15,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:15,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:15,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:15,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:15,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:15,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 40 [2024-06-21 18:13:15,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 87 transitions, 729 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) [2024-06-21 18:13:15,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:15,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 40 [2024-06-21 18:13:15,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:15,185 INFO L124 PetriNetUnfolderBase]: 466/976 cut-off events. [2024-06-21 18:13:15,185 INFO L125 PetriNetUnfolderBase]: For 4400/4403 co-relation queries the response was YES. [2024-06-21 18:13:15,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3461 conditions, 976 events. 466/976 cut-off events. For 4400/4403 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5996 event pairs, 100 based on Foata normal form. 7/961 useless extension candidates. Maximal degree in co-relation 3417. Up to 636 conditions per place. [2024-06-21 18:13:15,192 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 57 selfloop transitions, 28 changer transitions 0/103 dead transitions. [2024-06-21 18:13:15,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 103 transitions, 939 flow [2024-06-21 18:13:15,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:15,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:15,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-21 18:13:15,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-21 18:13:15,193 INFO L175 Difference]: Start difference. First operand has 94 places, 87 transitions, 729 flow. Second operand 5 states and 136 transitions. [2024-06-21 18:13:15,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 103 transitions, 939 flow [2024-06-21 18:13:15,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 103 transitions, 915 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-21 18:13:15,201 INFO L231 Difference]: Finished difference. Result has 98 places, 87 transitions, 775 flow [2024-06-21 18:13:15,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=775, PETRI_PLACES=98, PETRI_TRANSITIONS=87} [2024-06-21 18:13:15,202 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-21 18:13:15,202 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 87 transitions, 775 flow [2024-06-21 18:13:15,202 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) [2024-06-21 18:13:15,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:15,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:15,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 18:13:15,203 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:15,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:15,203 INFO L85 PathProgramCache]: Analyzing trace with hash -807852762, now seen corresponding path program 3 times [2024-06-21 18:13:15,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:15,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331203389] [2024-06-21 18:13:15,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:15,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:15,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:15,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331203389] [2024-06-21 18:13:15,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331203389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:15,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:15,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:15,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408407729] [2024-06-21 18:13:15,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:15,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:15,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:15,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:15,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:15,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:15,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 87 transitions, 775 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) [2024-06-21 18:13:15,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:15,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:15,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:15,404 INFO L124 PetriNetUnfolderBase]: 506/1025 cut-off events. [2024-06-21 18:13:15,404 INFO L125 PetriNetUnfolderBase]: For 4636/4636 co-relation queries the response was YES. [2024-06-21 18:13:15,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3732 conditions, 1025 events. 506/1025 cut-off events. For 4636/4636 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6127 event pairs, 125 based on Foata normal form. 2/1004 useless extension candidates. Maximal degree in co-relation 3686. Up to 763 conditions per place. [2024-06-21 18:13:15,411 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 74 selfloop transitions, 19 changer transitions 0/103 dead transitions. [2024-06-21 18:13:15,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 103 transitions, 1004 flow [2024-06-21 18:13:15,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:15,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:15,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 18:13:15,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 18:13:15,412 INFO L175 Difference]: Start difference. First operand has 98 places, 87 transitions, 775 flow. Second operand 5 states and 130 transitions. [2024-06-21 18:13:15,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 103 transitions, 1004 flow [2024-06-21 18:13:15,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 103 transitions, 942 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:15,422 INFO L231 Difference]: Finished difference. Result has 99 places, 87 transitions, 759 flow [2024-06-21 18:13:15,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=759, PETRI_PLACES=99, PETRI_TRANSITIONS=87} [2024-06-21 18:13:15,423 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 58 predicate places. [2024-06-21 18:13:15,423 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 87 transitions, 759 flow [2024-06-21 18:13:15,423 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) [2024-06-21 18:13:15,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:15,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:15,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 18:13:15,424 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:15,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:15,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1419704304, now seen corresponding path program 1 times [2024-06-21 18:13:15,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:15,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621911857] [2024-06-21 18:13:15,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:15,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:15,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:15,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621911857] [2024-06-21 18:13:15,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621911857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:15,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:15,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:15,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606033688] [2024-06-21 18:13:15,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:15,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:15,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:15,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:15,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:15,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:15,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 87 transitions, 759 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:15,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:15,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:15,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:15,664 INFO L124 PetriNetUnfolderBase]: 518/1045 cut-off events. [2024-06-21 18:13:15,664 INFO L125 PetriNetUnfolderBase]: For 4742/4742 co-relation queries the response was YES. [2024-06-21 18:13:15,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3755 conditions, 1045 events. 518/1045 cut-off events. For 4742/4742 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6333 event pairs, 123 based on Foata normal form. 4/1020 useless extension candidates. Maximal degree in co-relation 3708. Up to 689 conditions per place. [2024-06-21 18:13:15,670 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 87 selfloop transitions, 22 changer transitions 0/119 dead transitions. [2024-06-21 18:13:15,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 119 transitions, 1108 flow [2024-06-21 18:13:15,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:15,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:15,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 18:13:15,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-21 18:13:15,672 INFO L175 Difference]: Start difference. First operand has 99 places, 87 transitions, 759 flow. Second operand 7 states and 177 transitions. [2024-06-21 18:13:15,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 119 transitions, 1108 flow [2024-06-21 18:13:15,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 119 transitions, 1072 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:15,681 INFO L231 Difference]: Finished difference. Result has 104 places, 91 transitions, 812 flow [2024-06-21 18:13:15,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=812, PETRI_PLACES=104, PETRI_TRANSITIONS=91} [2024-06-21 18:13:15,682 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-21 18:13:15,682 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 91 transitions, 812 flow [2024-06-21 18:13:15,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:15,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:15,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:15,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 18:13:15,683 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:15,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:15,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1423423374, now seen corresponding path program 2 times [2024-06-21 18:13:15,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:15,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98823813] [2024-06-21 18:13:15,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:15,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:15,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:15,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98823813] [2024-06-21 18:13:15,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98823813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:15,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:15,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:15,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225029368] [2024-06-21 18:13:15,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:15,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:15,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:15,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:15,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:15,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:15,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 91 transitions, 812 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:15,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:15,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:15,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:15,938 INFO L124 PetriNetUnfolderBase]: 550/1121 cut-off events. [2024-06-21 18:13:15,938 INFO L125 PetriNetUnfolderBase]: For 5314/5314 co-relation queries the response was YES. [2024-06-21 18:13:15,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4106 conditions, 1121 events. 550/1121 cut-off events. For 5314/5314 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6956 event pairs, 131 based on Foata normal form. 4/1098 useless extension candidates. Maximal degree in co-relation 4057. Up to 789 conditions per place. [2024-06-21 18:13:15,945 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 86 selfloop transitions, 21 changer transitions 0/117 dead transitions. [2024-06-21 18:13:15,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 117 transitions, 1132 flow [2024-06-21 18:13:15,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:15,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 18:13:15,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 18:13:15,946 INFO L175 Difference]: Start difference. First operand has 104 places, 91 transitions, 812 flow. Second operand 7 states and 175 transitions. [2024-06-21 18:13:15,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 117 transitions, 1132 flow [2024-06-21 18:13:15,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 117 transitions, 1089 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:15,959 INFO L231 Difference]: Finished difference. Result has 109 places, 94 transitions, 844 flow [2024-06-21 18:13:15,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=844, PETRI_PLACES=109, PETRI_TRANSITIONS=94} [2024-06-21 18:13:15,959 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2024-06-21 18:13:15,959 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 94 transitions, 844 flow [2024-06-21 18:13:15,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:15,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:15,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:15,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 18:13:15,960 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:15,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:15,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1423428954, now seen corresponding path program 3 times [2024-06-21 18:13:15,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:15,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416345694] [2024-06-21 18:13:15,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:15,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:16,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:16,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416345694] [2024-06-21 18:13:16,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416345694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:16,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:16,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:16,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395203781] [2024-06-21 18:13:16,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:16,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:16,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:16,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:16,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:16,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:16,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 94 transitions, 844 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:16,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:16,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:16,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:16,252 INFO L124 PetriNetUnfolderBase]: 542/1105 cut-off events. [2024-06-21 18:13:16,252 INFO L125 PetriNetUnfolderBase]: For 5404/5404 co-relation queries the response was YES. [2024-06-21 18:13:16,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4023 conditions, 1105 events. 542/1105 cut-off events. For 5404/5404 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6819 event pairs, 127 based on Foata normal form. 4/1087 useless extension candidates. Maximal degree in co-relation 3972. Up to 785 conditions per place. [2024-06-21 18:13:16,259 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 87 selfloop transitions, 23 changer transitions 0/120 dead transitions. [2024-06-21 18:13:16,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 120 transitions, 1132 flow [2024-06-21 18:13:16,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:16,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:16,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-21 18:13:16,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-06-21 18:13:16,261 INFO L175 Difference]: Start difference. First operand has 109 places, 94 transitions, 844 flow. Second operand 9 states and 214 transitions. [2024-06-21 18:13:16,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 120 transitions, 1132 flow [2024-06-21 18:13:16,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 120 transitions, 1110 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:16,274 INFO L231 Difference]: Finished difference. Result has 115 places, 95 transitions, 879 flow [2024-06-21 18:13:16,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=879, PETRI_PLACES=115, PETRI_TRANSITIONS=95} [2024-06-21 18:13:16,275 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2024-06-21 18:13:16,275 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 95 transitions, 879 flow [2024-06-21 18:13:16,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:16,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:16,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:16,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 18:13:16,277 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:16,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:16,277 INFO L85 PathProgramCache]: Analyzing trace with hash 733720798, now seen corresponding path program 4 times [2024-06-21 18:13:16,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:16,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796224938] [2024-06-21 18:13:16,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:16,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:16,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:16,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796224938] [2024-06-21 18:13:16,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796224938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:16,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:16,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:16,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575537220] [2024-06-21 18:13:16,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:16,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:16,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:16,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:16,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:16,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:16,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 95 transitions, 879 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:16,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:16,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:16,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:16,572 INFO L124 PetriNetUnfolderBase]: 554/1130 cut-off events. [2024-06-21 18:13:16,572 INFO L125 PetriNetUnfolderBase]: For 6407/6413 co-relation queries the response was YES. [2024-06-21 18:13:16,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4202 conditions, 1130 events. 554/1130 cut-off events. For 6407/6413 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7091 event pairs, 117 based on Foata normal form. 10/1113 useless extension candidates. Maximal degree in co-relation 4149. Up to 737 conditions per place. [2024-06-21 18:13:16,579 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 85 selfloop transitions, 27 changer transitions 0/122 dead transitions. [2024-06-21 18:13:16,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 122 transitions, 1213 flow [2024-06-21 18:13:16,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:16,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:16,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 18:13:16,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-21 18:13:16,581 INFO L175 Difference]: Start difference. First operand has 115 places, 95 transitions, 879 flow. Second operand 8 states and 194 transitions. [2024-06-21 18:13:16,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 122 transitions, 1213 flow [2024-06-21 18:13:16,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 122 transitions, 1178 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:16,595 INFO L231 Difference]: Finished difference. Result has 118 places, 98 transitions, 931 flow [2024-06-21 18:13:16,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=931, PETRI_PLACES=118, PETRI_TRANSITIONS=98} [2024-06-21 18:13:16,596 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-21 18:13:16,596 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 98 transitions, 931 flow [2024-06-21 18:13:16,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:16,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:16,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:16,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 18:13:16,597 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:16,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:16,597 INFO L85 PathProgramCache]: Analyzing trace with hash 726363568, now seen corresponding path program 5 times [2024-06-21 18:13:16,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:16,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458059448] [2024-06-21 18:13:16,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:16,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:16,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:16,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458059448] [2024-06-21 18:13:16,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458059448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:16,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:16,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:16,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101393658] [2024-06-21 18:13:16,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:16,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:16,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:16,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:16,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:16,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:16,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 98 transitions, 931 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:16,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:16,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:16,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:16,876 INFO L124 PetriNetUnfolderBase]: 566/1157 cut-off events. [2024-06-21 18:13:16,876 INFO L125 PetriNetUnfolderBase]: For 6633/6633 co-relation queries the response was YES. [2024-06-21 18:13:16,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4391 conditions, 1157 events. 566/1157 cut-off events. For 6633/6633 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7328 event pairs, 117 based on Foata normal form. 4/1134 useless extension candidates. Maximal degree in co-relation 4336. Up to 745 conditions per place. [2024-06-21 18:13:16,883 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 86 selfloop transitions, 27 changer transitions 0/123 dead transitions. [2024-06-21 18:13:16,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 123 transitions, 1260 flow [2024-06-21 18:13:16,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:16,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:16,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 18:13:16,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6541666666666667 [2024-06-21 18:13:16,912 INFO L175 Difference]: Start difference. First operand has 118 places, 98 transitions, 931 flow. Second operand 6 states and 157 transitions. [2024-06-21 18:13:16,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 123 transitions, 1260 flow [2024-06-21 18:13:16,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 123 transitions, 1216 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:16,926 INFO L231 Difference]: Finished difference. Result has 120 places, 99 transitions, 955 flow [2024-06-21 18:13:16,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=955, PETRI_PLACES=120, PETRI_TRANSITIONS=99} [2024-06-21 18:13:16,927 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-21 18:13:16,927 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 99 transitions, 955 flow [2024-06-21 18:13:16,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:16,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:16,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:16,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 18:13:16,928 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:16,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:16,928 INFO L85 PathProgramCache]: Analyzing trace with hash 726369148, now seen corresponding path program 6 times [2024-06-21 18:13:16,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:16,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594071285] [2024-06-21 18:13:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:16,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:17,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:17,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594071285] [2024-06-21 18:13:17,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594071285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:17,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:17,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:17,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788610744] [2024-06-21 18:13:17,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:17,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:17,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:17,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:17,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:17,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:17,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 99 transitions, 955 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:17,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:17,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:17,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:17,212 INFO L124 PetriNetUnfolderBase]: 558/1145 cut-off events. [2024-06-21 18:13:17,212 INFO L125 PetriNetUnfolderBase]: For 6681/6681 co-relation queries the response was YES. [2024-06-21 18:13:17,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4328 conditions, 1145 events. 558/1145 cut-off events. For 6681/6681 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7216 event pairs, 115 based on Foata normal form. 4/1124 useless extension candidates. Maximal degree in co-relation 4271. Up to 741 conditions per place. [2024-06-21 18:13:17,219 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 88 selfloop transitions, 29 changer transitions 0/127 dead transitions. [2024-06-21 18:13:17,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 127 transitions, 1258 flow [2024-06-21 18:13:17,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:17,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:17,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 18:13:17,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-21 18:13:17,221 INFO L175 Difference]: Start difference. First operand has 120 places, 99 transitions, 955 flow. Second operand 8 states and 198 transitions. [2024-06-21 18:13:17,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 127 transitions, 1258 flow [2024-06-21 18:13:17,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 127 transitions, 1218 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:17,238 INFO L231 Difference]: Finished difference. Result has 124 places, 99 transitions, 979 flow [2024-06-21 18:13:17,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=979, PETRI_PLACES=124, PETRI_TRANSITIONS=99} [2024-06-21 18:13:17,239 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-21 18:13:17,239 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 99 transitions, 979 flow [2024-06-21 18:13:17,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:17,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:17,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:17,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 18:13:17,240 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:17,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:17,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1432875527, now seen corresponding path program 1 times [2024-06-21 18:13:17,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:17,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725114373] [2024-06-21 18:13:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:17,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:17,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:17,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725114373] [2024-06-21 18:13:17,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725114373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:17,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:17,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:17,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625715020] [2024-06-21 18:13:17,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:17,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:17,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:17,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:17,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:17,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:17,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 99 transitions, 979 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:17,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:17,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:17,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:17,533 INFO L124 PetriNetUnfolderBase]: 579/1178 cut-off events. [2024-06-21 18:13:17,534 INFO L125 PetriNetUnfolderBase]: For 7056/7062 co-relation queries the response was YES. [2024-06-21 18:13:17,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4519 conditions, 1178 events. 579/1178 cut-off events. For 7056/7062 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7439 event pairs, 140 based on Foata normal form. 8/1155 useless extension candidates. Maximal degree in co-relation 4462. Up to 813 conditions per place. [2024-06-21 18:13:17,541 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 76 selfloop transitions, 38 changer transitions 0/124 dead transitions. [2024-06-21 18:13:17,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 124 transitions, 1327 flow [2024-06-21 18:13:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:17,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:17,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 18:13:17,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-21 18:13:17,543 INFO L175 Difference]: Start difference. First operand has 124 places, 99 transitions, 979 flow. Second operand 8 states and 198 transitions. [2024-06-21 18:13:17,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 124 transitions, 1327 flow [2024-06-21 18:13:17,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 124 transitions, 1257 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:17,560 INFO L231 Difference]: Finished difference. Result has 125 places, 105 transitions, 1047 flow [2024-06-21 18:13:17,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1047, PETRI_PLACES=125, PETRI_TRANSITIONS=105} [2024-06-21 18:13:17,560 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2024-06-21 18:13:17,560 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 105 transitions, 1047 flow [2024-06-21 18:13:17,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:17,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:17,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:17,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 18:13:17,561 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:17,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:17,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1536126715, now seen corresponding path program 2 times [2024-06-21 18:13:17,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:17,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507136414] [2024-06-21 18:13:17,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:17,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:17,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:17,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507136414] [2024-06-21 18:13:17,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507136414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:17,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:17,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:17,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480226153] [2024-06-21 18:13:17,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:17,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:17,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:17,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:17,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:17,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:17,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 105 transitions, 1047 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:17,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:17,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:17,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:17,884 INFO L124 PetriNetUnfolderBase]: 587/1186 cut-off events. [2024-06-21 18:13:17,885 INFO L125 PetriNetUnfolderBase]: For 6911/6917 co-relation queries the response was YES. [2024-06-21 18:13:17,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4608 conditions, 1186 events. 587/1186 cut-off events. For 6911/6917 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7463 event pairs, 137 based on Foata normal form. 8/1164 useless extension candidates. Maximal degree in co-relation 4550. Up to 821 conditions per place. [2024-06-21 18:13:17,893 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 77 selfloop transitions, 38 changer transitions 0/125 dead transitions. [2024-06-21 18:13:17,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 125 transitions, 1373 flow [2024-06-21 18:13:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:17,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:17,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 18:13:17,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-21 18:13:17,894 INFO L175 Difference]: Start difference. First operand has 125 places, 105 transitions, 1047 flow. Second operand 7 states and 176 transitions. [2024-06-21 18:13:17,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 125 transitions, 1373 flow [2024-06-21 18:13:17,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 125 transitions, 1323 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:17,911 INFO L231 Difference]: Finished difference. Result has 129 places, 107 transitions, 1105 flow [2024-06-21 18:13:17,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=999, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1105, PETRI_PLACES=129, PETRI_TRANSITIONS=107} [2024-06-21 18:13:17,912 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 88 predicate places. [2024-06-21 18:13:17,912 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 107 transitions, 1105 flow [2024-06-21 18:13:17,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:17,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:17,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:17,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 18:13:17,913 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:17,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:17,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1535889565, now seen corresponding path program 3 times [2024-06-21 18:13:17,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:17,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114837230] [2024-06-21 18:13:17,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:17,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:18,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:18,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114837230] [2024-06-21 18:13:18,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114837230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:18,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:18,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:18,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153424271] [2024-06-21 18:13:18,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:18,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:18,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:18,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:18,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:18,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:18,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 107 transitions, 1105 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:18,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:18,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:18,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:18,175 INFO L124 PetriNetUnfolderBase]: 582/1181 cut-off events. [2024-06-21 18:13:18,175 INFO L125 PetriNetUnfolderBase]: For 8335/8347 co-relation queries the response was YES. [2024-06-21 18:13:18,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4653 conditions, 1181 events. 582/1181 cut-off events. For 8335/8347 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7453 event pairs, 153 based on Foata normal form. 14/1165 useless extension candidates. Maximal degree in co-relation 4593. Up to 817 conditions per place. [2024-06-21 18:13:18,184 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 74 selfloop transitions, 34 changer transitions 0/118 dead transitions. [2024-06-21 18:13:18,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 118 transitions, 1347 flow [2024-06-21 18:13:18,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:18,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:18,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-21 18:13:18,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-21 18:13:18,185 INFO L175 Difference]: Start difference. First operand has 129 places, 107 transitions, 1105 flow. Second operand 5 states and 129 transitions. [2024-06-21 18:13:18,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 118 transitions, 1347 flow [2024-06-21 18:13:18,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 118 transitions, 1261 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:18,201 INFO L231 Difference]: Finished difference. Result has 128 places, 107 transitions, 1095 flow [2024-06-21 18:13:18,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1019, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1095, PETRI_PLACES=128, PETRI_TRANSITIONS=107} [2024-06-21 18:13:18,203 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-21 18:13:18,203 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 107 transitions, 1095 flow [2024-06-21 18:13:18,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:18,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:18,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:18,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 18:13:18,204 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:18,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:18,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1837163525, now seen corresponding path program 4 times [2024-06-21 18:13:18,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:18,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001943016] [2024-06-21 18:13:18,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:18,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:18,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:18,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001943016] [2024-06-21 18:13:18,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001943016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:18,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:18,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:18,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789018407] [2024-06-21 18:13:18,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:18,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:18,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:18,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:18,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:18,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:18,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 107 transitions, 1095 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:18,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:18,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:18,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:18,459 INFO L124 PetriNetUnfolderBase]: 590/1195 cut-off events. [2024-06-21 18:13:18,460 INFO L125 PetriNetUnfolderBase]: For 6610/6616 co-relation queries the response was YES. [2024-06-21 18:13:18,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4642 conditions, 1195 events. 590/1195 cut-off events. For 6610/6616 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 7512 event pairs, 145 based on Foata normal form. 8/1171 useless extension candidates. Maximal degree in co-relation 4583. Up to 794 conditions per place. [2024-06-21 18:13:18,467 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 83 selfloop transitions, 39 changer transitions 0/132 dead transitions. [2024-06-21 18:13:18,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 132 transitions, 1463 flow [2024-06-21 18:13:18,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:18,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 18:13:18,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-21 18:13:18,468 INFO L175 Difference]: Start difference. First operand has 128 places, 107 transitions, 1095 flow. Second operand 7 states and 177 transitions. [2024-06-21 18:13:18,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 132 transitions, 1463 flow [2024-06-21 18:13:18,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 132 transitions, 1388 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:18,483 INFO L231 Difference]: Finished difference. Result has 131 places, 113 transitions, 1167 flow [2024-06-21 18:13:18,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1167, PETRI_PLACES=131, PETRI_TRANSITIONS=113} [2024-06-21 18:13:18,483 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-21 18:13:18,483 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 113 transitions, 1167 flow [2024-06-21 18:13:18,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:18,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:18,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:18,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 18:13:18,484 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:18,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:18,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1943411975, now seen corresponding path program 5 times [2024-06-21 18:13:18,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:18,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504664206] [2024-06-21 18:13:18,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:18,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:18,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:18,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:18,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504664206] [2024-06-21 18:13:18,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504664206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:18,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:18,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:18,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519996051] [2024-06-21 18:13:18,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:18,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:18,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:18,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:18,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:18,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:18,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 113 transitions, 1167 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:18,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:18,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:18,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:18,725 INFO L124 PetriNetUnfolderBase]: 598/1203 cut-off events. [2024-06-21 18:13:18,725 INFO L125 PetriNetUnfolderBase]: For 7010/7016 co-relation queries the response was YES. [2024-06-21 18:13:18,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4797 conditions, 1203 events. 598/1203 cut-off events. For 7010/7016 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7549 event pairs, 147 based on Foata normal form. 8/1181 useless extension candidates. Maximal degree in co-relation 4737. Up to 802 conditions per place. [2024-06-21 18:13:18,733 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 81 selfloop transitions, 42 changer transitions 0/133 dead transitions. [2024-06-21 18:13:18,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 133 transitions, 1511 flow [2024-06-21 18:13:18,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 18:13:18,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-21 18:13:18,734 INFO L175 Difference]: Start difference. First operand has 131 places, 113 transitions, 1167 flow. Second operand 6 states and 155 transitions. [2024-06-21 18:13:18,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 133 transitions, 1511 flow [2024-06-21 18:13:18,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 133 transitions, 1480 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:18,750 INFO L231 Difference]: Finished difference. Result has 135 places, 115 transitions, 1248 flow [2024-06-21 18:13:18,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1248, PETRI_PLACES=135, PETRI_TRANSITIONS=115} [2024-06-21 18:13:18,753 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-06-21 18:13:18,753 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 115 transitions, 1248 flow [2024-06-21 18:13:18,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:18,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:18,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:18,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 18:13:18,754 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:18,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:18,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1270501347, now seen corresponding path program 6 times [2024-06-21 18:13:18,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:18,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934338160] [2024-06-21 18:13:18,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:18,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:18,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:18,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934338160] [2024-06-21 18:13:18,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934338160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:18,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:18,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:18,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581287529] [2024-06-21 18:13:18,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:18,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:18,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:18,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:18,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:18,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:18,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 115 transitions, 1248 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:18,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:18,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:18,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:19,001 INFO L124 PetriNetUnfolderBase]: 606/1225 cut-off events. [2024-06-21 18:13:19,001 INFO L125 PetriNetUnfolderBase]: For 8791/8803 co-relation queries the response was YES. [2024-06-21 18:13:19,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5003 conditions, 1225 events. 606/1225 cut-off events. For 8791/8803 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7790 event pairs, 150 based on Foata normal form. 14/1205 useless extension candidates. Maximal degree in co-relation 4940. Up to 810 conditions per place. [2024-06-21 18:13:19,044 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 80 selfloop transitions, 41 changer transitions 0/131 dead transitions. [2024-06-21 18:13:19,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 131 transitions, 1584 flow [2024-06-21 18:13:19,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 18:13:19,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-21 18:13:19,045 INFO L175 Difference]: Start difference. First operand has 135 places, 115 transitions, 1248 flow. Second operand 6 states and 151 transitions. [2024-06-21 18:13:19,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 131 transitions, 1584 flow [2024-06-21 18:13:19,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 131 transitions, 1510 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:19,064 INFO L231 Difference]: Finished difference. Result has 137 places, 117 transitions, 1287 flow [2024-06-21 18:13:19,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1287, PETRI_PLACES=137, PETRI_TRANSITIONS=117} [2024-06-21 18:13:19,066 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-21 18:13:19,066 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 117 transitions, 1287 flow [2024-06-21 18:13:19,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:19,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:19,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:19,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 18:13:19,067 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:19,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:19,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1264787427, now seen corresponding path program 7 times [2024-06-21 18:13:19,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:19,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382321382] [2024-06-21 18:13:19,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:19,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:19,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:19,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382321382] [2024-06-21 18:13:19,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382321382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:19,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:19,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:19,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961127073] [2024-06-21 18:13:19,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:19,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:19,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:19,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:19,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:19,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:19,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 117 transitions, 1287 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:19,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:19,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:19,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:19,336 INFO L124 PetriNetUnfolderBase]: 601/1218 cut-off events. [2024-06-21 18:13:19,336 INFO L125 PetriNetUnfolderBase]: For 8597/8609 co-relation queries the response was YES. [2024-06-21 18:13:19,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4927 conditions, 1218 events. 601/1218 cut-off events. For 8597/8609 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7711 event pairs, 148 based on Foata normal form. 14/1200 useless extension candidates. Maximal degree in co-relation 4864. Up to 806 conditions per place. [2024-06-21 18:13:19,345 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 78 selfloop transitions, 42 changer transitions 0/130 dead transitions. [2024-06-21 18:13:19,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 130 transitions, 1557 flow [2024-06-21 18:13:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 18:13:19,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 18:13:19,347 INFO L175 Difference]: Start difference. First operand has 137 places, 117 transitions, 1287 flow. Second operand 6 states and 150 transitions. [2024-06-21 18:13:19,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 130 transitions, 1557 flow [2024-06-21 18:13:19,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 130 transitions, 1459 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:19,364 INFO L231 Difference]: Finished difference. Result has 140 places, 117 transitions, 1278 flow [2024-06-21 18:13:19,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1278, PETRI_PLACES=140, PETRI_TRANSITIONS=117} [2024-06-21 18:13:19,365 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-21 18:13:19,365 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 117 transitions, 1278 flow [2024-06-21 18:13:19,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:19,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:19,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:19,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 18:13:19,366 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:19,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:19,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1033327985, now seen corresponding path program 1 times [2024-06-21 18:13:19,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:19,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154240254] [2024-06-21 18:13:19,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:19,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:19,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:19,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154240254] [2024-06-21 18:13:19,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154240254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:19,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:19,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:19,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865717191] [2024-06-21 18:13:19,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:19,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:19,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:19,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:19,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:19,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:19,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 117 transitions, 1278 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:19,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:19,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:19,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:19,637 INFO L124 PetriNetUnfolderBase]: 633/1270 cut-off events. [2024-06-21 18:13:19,637 INFO L125 PetriNetUnfolderBase]: For 8879/8883 co-relation queries the response was YES. [2024-06-21 18:13:19,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5182 conditions, 1270 events. 633/1270 cut-off events. For 8879/8883 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8141 event pairs, 87 based on Foata normal form. 5/1243 useless extension candidates. Maximal degree in co-relation 5118. Up to 687 conditions per place. [2024-06-21 18:13:19,646 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 88 selfloop transitions, 41 changer transitions 0/139 dead transitions. [2024-06-21 18:13:19,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 139 transitions, 1642 flow [2024-06-21 18:13:19,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:19,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:19,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 18:13:19,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-06-21 18:13:19,647 INFO L175 Difference]: Start difference. First operand has 140 places, 117 transitions, 1278 flow. Second operand 6 states and 159 transitions. [2024-06-21 18:13:19,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 139 transitions, 1642 flow [2024-06-21 18:13:19,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 139 transitions, 1532 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:19,670 INFO L231 Difference]: Finished difference. Result has 141 places, 119 transitions, 1281 flow [2024-06-21 18:13:19,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1281, PETRI_PLACES=141, PETRI_TRANSITIONS=119} [2024-06-21 18:13:19,671 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-21 18:13:19,671 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 119 transitions, 1281 flow [2024-06-21 18:13:19,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:19,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:19,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:19,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 18:13:19,672 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:19,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:19,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1906552627, now seen corresponding path program 1 times [2024-06-21 18:13:19,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:19,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959037541] [2024-06-21 18:13:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:19,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:19,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:19,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959037541] [2024-06-21 18:13:19,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959037541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:19,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:19,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:19,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073961740] [2024-06-21 18:13:19,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:19,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:19,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:19,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:19,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:19,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:19,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 119 transitions, 1281 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:19,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:19,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:19,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:19,991 INFO L124 PetriNetUnfolderBase]: 710/1400 cut-off events. [2024-06-21 18:13:19,992 INFO L125 PetriNetUnfolderBase]: For 11483/11487 co-relation queries the response was YES. [2024-06-21 18:13:19,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5832 conditions, 1400 events. 710/1400 cut-off events. For 11483/11487 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 9003 event pairs, 121 based on Foata normal form. 5/1374 useless extension candidates. Maximal degree in co-relation 5768. Up to 878 conditions per place. [2024-06-21 18:13:20,001 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 98 selfloop transitions, 48 changer transitions 0/156 dead transitions. [2024-06-21 18:13:20,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 156 transitions, 1872 flow [2024-06-21 18:13:20,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:20,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:20,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 18:13:20,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392857142857142 [2024-06-21 18:13:20,003 INFO L175 Difference]: Start difference. First operand has 141 places, 119 transitions, 1281 flow. Second operand 7 states and 179 transitions. [2024-06-21 18:13:20,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 156 transitions, 1872 flow [2024-06-21 18:13:20,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 156 transitions, 1815 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:20,034 INFO L231 Difference]: Finished difference. Result has 147 places, 135 transitions, 1600 flow [2024-06-21 18:13:20,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1600, PETRI_PLACES=147, PETRI_TRANSITIONS=135} [2024-06-21 18:13:20,035 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 106 predicate places. [2024-06-21 18:13:20,035 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 135 transitions, 1600 flow [2024-06-21 18:13:20,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:20,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:20,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:20,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 18:13:20,036 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:20,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:20,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1876322291, now seen corresponding path program 2 times [2024-06-21 18:13:20,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:20,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169566355] [2024-06-21 18:13:20,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:20,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:20,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:20,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169566355] [2024-06-21 18:13:20,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169566355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:20,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:20,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:20,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331622074] [2024-06-21 18:13:20,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:20,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:20,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:20,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:20,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:20,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:20,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 135 transitions, 1600 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:20,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:20,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:20,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:20,349 INFO L124 PetriNetUnfolderBase]: 722/1436 cut-off events. [2024-06-21 18:13:20,350 INFO L125 PetriNetUnfolderBase]: For 12046/12050 co-relation queries the response was YES. [2024-06-21 18:13:20,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6253 conditions, 1436 events. 722/1436 cut-off events. For 12046/12050 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 9381 event pairs, 147 based on Foata normal form. 5/1400 useless extension candidates. Maximal degree in co-relation 6186. Up to 967 conditions per place. [2024-06-21 18:13:20,361 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 98 selfloop transitions, 43 changer transitions 0/151 dead transitions. [2024-06-21 18:13:20,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 151 transitions, 1928 flow [2024-06-21 18:13:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:20,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 18:13:20,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-21 18:13:20,362 INFO L175 Difference]: Start difference. First operand has 147 places, 135 transitions, 1600 flow. Second operand 6 states and 154 transitions. [2024-06-21 18:13:20,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 151 transitions, 1928 flow [2024-06-21 18:13:20,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 151 transitions, 1899 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:20,394 INFO L231 Difference]: Finished difference. Result has 151 places, 136 transitions, 1681 flow [2024-06-21 18:13:20,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1571, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1681, PETRI_PLACES=151, PETRI_TRANSITIONS=136} [2024-06-21 18:13:20,395 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-21 18:13:20,395 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 136 transitions, 1681 flow [2024-06-21 18:13:20,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:20,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:20,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:20,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 18:13:20,396 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:20,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:20,396 INFO L85 PathProgramCache]: Analyzing trace with hash -85825973, now seen corresponding path program 2 times [2024-06-21 18:13:20,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:20,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906991286] [2024-06-21 18:13:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:20,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:20,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:20,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906991286] [2024-06-21 18:13:20,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906991286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:20,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:20,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:20,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120197545] [2024-06-21 18:13:20,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:20,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:20,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:20,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:20,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:20,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:20,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 136 transitions, 1681 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:20,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:20,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:20,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:20,714 INFO L124 PetriNetUnfolderBase]: 734/1448 cut-off events. [2024-06-21 18:13:20,714 INFO L125 PetriNetUnfolderBase]: For 13004/13008 co-relation queries the response was YES. [2024-06-21 18:13:20,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6499 conditions, 1448 events. 734/1448 cut-off events. For 13004/13008 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 9386 event pairs, 129 based on Foata normal form. 5/1422 useless extension candidates. Maximal degree in co-relation 6430. Up to 906 conditions per place. [2024-06-21 18:13:20,723 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 97 selfloop transitions, 49 changer transitions 0/156 dead transitions. [2024-06-21 18:13:20,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 156 transitions, 2084 flow [2024-06-21 18:13:20,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:20,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 18:13:20,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 18:13:20,724 INFO L175 Difference]: Start difference. First operand has 151 places, 136 transitions, 1681 flow. Second operand 6 states and 156 transitions. [2024-06-21 18:13:20,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 156 transitions, 2084 flow [2024-06-21 18:13:20,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 156 transitions, 1990 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:20,752 INFO L231 Difference]: Finished difference. Result has 154 places, 138 transitions, 1766 flow [2024-06-21 18:13:20,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1589, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1766, PETRI_PLACES=154, PETRI_TRANSITIONS=138} [2024-06-21 18:13:20,753 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-21 18:13:20,753 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 138 transitions, 1766 flow [2024-06-21 18:13:20,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:20,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:20,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:20,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 18:13:20,753 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:20,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:20,754 INFO L85 PathProgramCache]: Analyzing trace with hash -85588823, now seen corresponding path program 3 times [2024-06-21 18:13:20,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:20,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357835238] [2024-06-21 18:13:20,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:20,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:20,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:20,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357835238] [2024-06-21 18:13:20,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357835238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:20,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:20,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:20,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105439516] [2024-06-21 18:13:20,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:20,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:20,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:20,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:20,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:20,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:20,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 138 transitions, 1766 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:20,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:20,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:20,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:21,052 INFO L124 PetriNetUnfolderBase]: 726/1440 cut-off events. [2024-06-21 18:13:21,052 INFO L125 PetriNetUnfolderBase]: For 13047/13051 co-relation queries the response was YES. [2024-06-21 18:13:21,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6572 conditions, 1440 events. 726/1440 cut-off events. For 13047/13051 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9350 event pairs, 121 based on Foata normal form. 5/1414 useless extension candidates. Maximal degree in co-relation 6501. Up to 902 conditions per place. [2024-06-21 18:13:21,062 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 98 selfloop transitions, 49 changer transitions 0/157 dead transitions. [2024-06-21 18:13:21,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 157 transitions, 2102 flow [2024-06-21 18:13:21,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:21,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:21,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 18:13:21,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-21 18:13:21,064 INFO L175 Difference]: Start difference. First operand has 154 places, 138 transitions, 1766 flow. Second operand 7 states and 177 transitions. [2024-06-21 18:13:21,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 157 transitions, 2102 flow [2024-06-21 18:13:21,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 157 transitions, 2048 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:21,097 INFO L231 Difference]: Finished difference. Result has 158 places, 138 transitions, 1820 flow [2024-06-21 18:13:21,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1712, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1820, PETRI_PLACES=158, PETRI_TRANSITIONS=138} [2024-06-21 18:13:21,097 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-21 18:13:21,097 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 138 transitions, 1820 flow [2024-06-21 18:13:21,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:21,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:21,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:21,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 18:13:21,098 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:21,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:21,099 INFO L85 PathProgramCache]: Analyzing trace with hash -85826159, now seen corresponding path program 3 times [2024-06-21 18:13:21,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:21,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923809417] [2024-06-21 18:13:21,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:21,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:21,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:21,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923809417] [2024-06-21 18:13:21,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923809417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:21,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:21,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:21,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4016072] [2024-06-21 18:13:21,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:21,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:21,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:21,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:21,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:21,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:21,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 138 transitions, 1820 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:21,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:21,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:21,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:21,410 INFO L124 PetriNetUnfolderBase]: 718/1436 cut-off events. [2024-06-21 18:13:21,410 INFO L125 PetriNetUnfolderBase]: For 12823/12827 co-relation queries the response was YES. [2024-06-21 18:13:21,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6521 conditions, 1436 events. 718/1436 cut-off events. For 12823/12827 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 9407 event pairs, 95 based on Foata normal form. 5/1407 useless extension candidates. Maximal degree in co-relation 6449. Up to 832 conditions per place. [2024-06-21 18:13:21,419 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 96 selfloop transitions, 48 changer transitions 0/154 dead transitions. [2024-06-21 18:13:21,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 154 transitions, 2146 flow [2024-06-21 18:13:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:21,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-21 18:13:21,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-21 18:13:21,421 INFO L175 Difference]: Start difference. First operand has 158 places, 138 transitions, 1820 flow. Second operand 5 states and 135 transitions. [2024-06-21 18:13:21,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 154 transitions, 2146 flow [2024-06-21 18:13:21,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 154 transitions, 2032 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:21,479 INFO L231 Difference]: Finished difference. Result has 157 places, 138 transitions, 1828 flow [2024-06-21 18:13:21,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1828, PETRI_PLACES=157, PETRI_TRANSITIONS=138} [2024-06-21 18:13:21,480 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-21 18:13:21,480 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 138 transitions, 1828 flow [2024-06-21 18:13:21,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:21,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:21,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:21,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 18:13:21,481 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:21,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:21,481 INFO L85 PathProgramCache]: Analyzing trace with hash -987261893, now seen corresponding path program 4 times [2024-06-21 18:13:21,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:21,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327230533] [2024-06-21 18:13:21,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:21,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:21,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:21,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327230533] [2024-06-21 18:13:21,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327230533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:21,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:21,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:21,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829953156] [2024-06-21 18:13:21,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:21,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:21,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:21,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:21,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:21,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:21,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 138 transitions, 1828 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:21,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:21,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:21,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:21,749 INFO L124 PetriNetUnfolderBase]: 750/1496 cut-off events. [2024-06-21 18:13:21,749 INFO L125 PetriNetUnfolderBase]: For 14255/14259 co-relation queries the response was YES. [2024-06-21 18:13:21,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6834 conditions, 1496 events. 750/1496 cut-off events. For 14255/14259 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 9942 event pairs, 89 based on Foata normal form. 5/1470 useless extension candidates. Maximal degree in co-relation 6762. Up to 629 conditions per place. [2024-06-21 18:13:21,759 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 104 selfloop transitions, 50 changer transitions 0/164 dead transitions. [2024-06-21 18:13:21,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 164 transitions, 2310 flow [2024-06-21 18:13:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:21,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 18:13:21,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-21 18:13:21,760 INFO L175 Difference]: Start difference. First operand has 157 places, 138 transitions, 1828 flow. Second operand 7 states and 178 transitions. [2024-06-21 18:13:21,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 164 transitions, 2310 flow [2024-06-21 18:13:21,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 164 transitions, 2170 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:21,798 INFO L231 Difference]: Finished difference. Result has 158 places, 140 transitions, 1828 flow [2024-06-21 18:13:21,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1828, PETRI_PLACES=158, PETRI_TRANSITIONS=140} [2024-06-21 18:13:21,799 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-21 18:13:21,799 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 140 transitions, 1828 flow [2024-06-21 18:13:21,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:21,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:21,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:21,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 18:13:21,800 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:21,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:21,801 INFO L85 PathProgramCache]: Analyzing trace with hash -986962991, now seen corresponding path program 1 times [2024-06-21 18:13:21,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:21,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260376550] [2024-06-21 18:13:21,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:21,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:21,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:21,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260376550] [2024-06-21 18:13:21,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260376550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:21,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:21,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:21,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162369482] [2024-06-21 18:13:21,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:21,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:21,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:21,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:21,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:21,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:21,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 140 transitions, 1828 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:21,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:21,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:21,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:22,136 INFO L124 PetriNetUnfolderBase]: 782/1566 cut-off events. [2024-06-21 18:13:22,137 INFO L125 PetriNetUnfolderBase]: For 13682/13688 co-relation queries the response was YES. [2024-06-21 18:13:22,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7039 conditions, 1566 events. 782/1566 cut-off events. For 13682/13688 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 10504 event pairs, 137 based on Foata normal form. 10/1550 useless extension candidates. Maximal degree in co-relation 6968. Up to 849 conditions per place. [2024-06-21 18:13:22,149 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 91 selfloop transitions, 70 changer transitions 0/171 dead transitions. [2024-06-21 18:13:22,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 171 transitions, 2276 flow [2024-06-21 18:13:22,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:22,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-21 18:13:22,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 18:13:22,151 INFO L175 Difference]: Start difference. First operand has 158 places, 140 transitions, 1828 flow. Second operand 10 states and 245 transitions. [2024-06-21 18:13:22,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 171 transitions, 2276 flow [2024-06-21 18:13:22,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 171 transitions, 2198 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:22,189 INFO L231 Difference]: Finished difference. Result has 165 places, 142 transitions, 1914 flow [2024-06-21 18:13:22,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1914, PETRI_PLACES=165, PETRI_TRANSITIONS=142} [2024-06-21 18:13:22,190 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-21 18:13:22,190 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 142 transitions, 1914 flow [2024-06-21 18:13:22,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:22,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:22,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:22,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 18:13:22,191 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:22,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:22,191 INFO L85 PathProgramCache]: Analyzing trace with hash 318047869, now seen corresponding path program 5 times [2024-06-21 18:13:22,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:22,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92152338] [2024-06-21 18:13:22,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:22,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:22,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:22,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92152338] [2024-06-21 18:13:22,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92152338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:22,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:22,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:22,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610912205] [2024-06-21 18:13:22,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:22,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:22,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:22,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:22,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:22,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:22,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 142 transitions, 1914 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:22,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:22,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:22,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:22,530 INFO L124 PetriNetUnfolderBase]: 814/1628 cut-off events. [2024-06-21 18:13:22,530 INFO L125 PetriNetUnfolderBase]: For 15820/15824 co-relation queries the response was YES. [2024-06-21 18:13:22,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7469 conditions, 1628 events. 814/1628 cut-off events. For 15820/15824 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11034 event pairs, 101 based on Foata normal form. 5/1586 useless extension candidates. Maximal degree in co-relation 7397. Up to 701 conditions per place. [2024-06-21 18:13:22,543 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 102 selfloop transitions, 53 changer transitions 0/165 dead transitions. [2024-06-21 18:13:22,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 165 transitions, 2384 flow [2024-06-21 18:13:22,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:22,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 18:13:22,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-21 18:13:22,545 INFO L175 Difference]: Start difference. First operand has 165 places, 142 transitions, 1914 flow. Second operand 7 states and 176 transitions. [2024-06-21 18:13:22,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 165 transitions, 2384 flow [2024-06-21 18:13:22,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 165 transitions, 2279 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:22,586 INFO L231 Difference]: Finished difference. Result has 165 places, 144 transitions, 1945 flow [2024-06-21 18:13:22,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1945, PETRI_PLACES=165, PETRI_TRANSITIONS=144} [2024-06-21 18:13:22,586 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-21 18:13:22,587 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 144 transitions, 1945 flow [2024-06-21 18:13:22,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:22,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:22,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:22,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 18:13:22,587 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:22,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:22,588 INFO L85 PathProgramCache]: Analyzing trace with hash -992624273, now seen corresponding path program 6 times [2024-06-21 18:13:22,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:22,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180130976] [2024-06-21 18:13:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:22,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:22,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:22,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180130976] [2024-06-21 18:13:22,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180130976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:22,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:22,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:22,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228837675] [2024-06-21 18:13:22,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:22,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:22,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:22,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:22,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:22,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:22,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 144 transitions, 1945 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:22,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:22,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:22,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:22,900 INFO L124 PetriNetUnfolderBase]: 806/1602 cut-off events. [2024-06-21 18:13:22,901 INFO L125 PetriNetUnfolderBase]: For 14822/14826 co-relation queries the response was YES. [2024-06-21 18:13:22,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7450 conditions, 1602 events. 806/1602 cut-off events. For 14822/14826 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 10768 event pairs, 106 based on Foata normal form. 5/1568 useless extension candidates. Maximal degree in co-relation 7377. Up to 697 conditions per place. [2024-06-21 18:13:22,913 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 113 selfloop transitions, 46 changer transitions 0/169 dead transitions. [2024-06-21 18:13:22,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 169 transitions, 2411 flow [2024-06-21 18:13:22,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:22,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:22,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 18:13:22,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-21 18:13:22,914 INFO L175 Difference]: Start difference. First operand has 165 places, 144 transitions, 1945 flow. Second operand 7 states and 178 transitions. [2024-06-21 18:13:22,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 169 transitions, 2411 flow [2024-06-21 18:13:22,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 169 transitions, 2333 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:22,953 INFO L231 Difference]: Finished difference. Result has 169 places, 144 transitions, 1963 flow [2024-06-21 18:13:22,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1963, PETRI_PLACES=169, PETRI_TRANSITIONS=144} [2024-06-21 18:13:22,954 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-21 18:13:22,954 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 144 transitions, 1963 flow [2024-06-21 18:13:22,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:22,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:22,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:22,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 18:13:22,955 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:22,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:22,955 INFO L85 PathProgramCache]: Analyzing trace with hash 312506929, now seen corresponding path program 7 times [2024-06-21 18:13:22,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:22,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128558831] [2024-06-21 18:13:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:22,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:23,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:23,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128558831] [2024-06-21 18:13:23,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128558831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:23,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:23,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:23,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934953441] [2024-06-21 18:13:23,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:23,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:23,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:23,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:23,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:23,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:23,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 144 transitions, 1963 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:23,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:23,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:23,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:23,291 INFO L124 PetriNetUnfolderBase]: 826/1638 cut-off events. [2024-06-21 18:13:23,291 INFO L125 PetriNetUnfolderBase]: For 16151/16155 co-relation queries the response was YES. [2024-06-21 18:13:23,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7645 conditions, 1638 events. 826/1638 cut-off events. For 16151/16155 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 11077 event pairs, 178 based on Foata normal form. 5/1595 useless extension candidates. Maximal degree in co-relation 7571. Up to 1114 conditions per place. [2024-06-21 18:13:23,303 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 114 selfloop transitions, 43 changer transitions 0/167 dead transitions. [2024-06-21 18:13:23,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 167 transitions, 2355 flow [2024-06-21 18:13:23,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:23,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:23,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 18:13:23,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 18:13:23,305 INFO L175 Difference]: Start difference. First operand has 169 places, 144 transitions, 1963 flow. Second operand 7 states and 175 transitions. [2024-06-21 18:13:23,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 167 transitions, 2355 flow [2024-06-21 18:13:23,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 167 transitions, 2180 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:23,340 INFO L231 Difference]: Finished difference. Result has 169 places, 147 transitions, 1912 flow [2024-06-21 18:13:23,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1798, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1912, PETRI_PLACES=169, PETRI_TRANSITIONS=147} [2024-06-21 18:13:23,340 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-21 18:13:23,340 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 147 transitions, 1912 flow [2024-06-21 18:13:23,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:23,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:23,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:23,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 18:13:23,341 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:23,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:23,341 INFO L85 PathProgramCache]: Analyzing trace with hash 321444415, now seen corresponding path program 4 times [2024-06-21 18:13:23,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:23,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377564] [2024-06-21 18:13:23,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:23,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:23,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:23,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377564] [2024-06-21 18:13:23,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:23,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:23,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:23,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741957194] [2024-06-21 18:13:23,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:23,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:23,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:23,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:23,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:23,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:23,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 147 transitions, 1912 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:23,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:23,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:23,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:23,696 INFO L124 PetriNetUnfolderBase]: 858/1710 cut-off events. [2024-06-21 18:13:23,696 INFO L125 PetriNetUnfolderBase]: For 17872/17876 co-relation queries the response was YES. [2024-06-21 18:13:23,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7679 conditions, 1710 events. 858/1710 cut-off events. For 17872/17876 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 11710 event pairs, 137 based on Foata normal form. 5/1679 useless extension candidates. Maximal degree in co-relation 7605. Up to 986 conditions per place. [2024-06-21 18:13:23,707 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 102 selfloop transitions, 67 changer transitions 0/179 dead transitions. [2024-06-21 18:13:23,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 179 transitions, 2386 flow [2024-06-21 18:13:23,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:23,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:23,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-21 18:13:23,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075 [2024-06-21 18:13:23,708 INFO L175 Difference]: Start difference. First operand has 169 places, 147 transitions, 1912 flow. Second operand 10 states and 243 transitions. [2024-06-21 18:13:23,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 179 transitions, 2386 flow [2024-06-21 18:13:23,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 179 transitions, 2296 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:23,747 INFO L231 Difference]: Finished difference. Result has 175 places, 149 transitions, 1982 flow [2024-06-21 18:13:23,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1982, PETRI_PLACES=175, PETRI_TRANSITIONS=149} [2024-06-21 18:13:23,747 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-21 18:13:23,747 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 149 transitions, 1982 flow [2024-06-21 18:13:23,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:23,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:23,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:23,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 18:13:23,748 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:23,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:23,749 INFO L85 PathProgramCache]: Analyzing trace with hash 321761545, now seen corresponding path program 5 times [2024-06-21 18:13:23,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:23,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994896683] [2024-06-21 18:13:23,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:23,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:23,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:23,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994896683] [2024-06-21 18:13:23,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994896683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:23,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:23,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:23,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792739579] [2024-06-21 18:13:23,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:23,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:23,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:23,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:23,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:23,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:23,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 149 transitions, 1982 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:23,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:23,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:23,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:24,117 INFO L124 PetriNetUnfolderBase]: 898/1796 cut-off events. [2024-06-21 18:13:24,118 INFO L125 PetriNetUnfolderBase]: For 20346/20350 co-relation queries the response was YES. [2024-06-21 18:13:24,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8214 conditions, 1796 events. 898/1796 cut-off events. For 20346/20350 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 12417 event pairs, 142 based on Foata normal form. 5/1764 useless extension candidates. Maximal degree in co-relation 8139. Up to 1010 conditions per place. [2024-06-21 18:13:24,131 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 106 selfloop transitions, 68 changer transitions 0/184 dead transitions. [2024-06-21 18:13:24,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 184 transitions, 2540 flow [2024-06-21 18:13:24,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:13:24,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:13:24,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 265 transitions. [2024-06-21 18:13:24,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-21 18:13:24,134 INFO L175 Difference]: Start difference. First operand has 175 places, 149 transitions, 1982 flow. Second operand 11 states and 265 transitions. [2024-06-21 18:13:24,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 184 transitions, 2540 flow [2024-06-21 18:13:24,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 184 transitions, 2393 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:24,174 INFO L231 Difference]: Finished difference. Result has 179 places, 153 transitions, 2015 flow [2024-06-21 18:13:24,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2015, PETRI_PLACES=179, PETRI_TRANSITIONS=153} [2024-06-21 18:13:24,176 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-21 18:13:24,176 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 153 transitions, 2015 flow [2024-06-21 18:13:24,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:24,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:24,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:24,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 18:13:24,176 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:24,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:24,177 INFO L85 PathProgramCache]: Analyzing trace with hash 321772891, now seen corresponding path program 2 times [2024-06-21 18:13:24,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:24,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176948010] [2024-06-21 18:13:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:24,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:24,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:24,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176948010] [2024-06-21 18:13:24,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176948010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:24,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:24,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:24,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022850197] [2024-06-21 18:13:24,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:24,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:24,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:24,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:24,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:24,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:24,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 153 transitions, 2015 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:24,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:24,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:24,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:24,607 INFO L124 PetriNetUnfolderBase]: 938/1882 cut-off events. [2024-06-21 18:13:24,608 INFO L125 PetriNetUnfolderBase]: For 22926/22932 co-relation queries the response was YES. [2024-06-21 18:13:24,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8562 conditions, 1882 events. 938/1882 cut-off events. For 22926/22932 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 13212 event pairs, 218 based on Foata normal form. 10/1841 useless extension candidates. Maximal degree in co-relation 8486. Up to 1278 conditions per place. [2024-06-21 18:13:24,618 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 113 selfloop transitions, 61 changer transitions 0/184 dead transitions. [2024-06-21 18:13:24,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 184 transitions, 2515 flow [2024-06-21 18:13:24,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:13:24,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:13:24,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-06-21 18:13:24,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 18:13:24,620 INFO L175 Difference]: Start difference. First operand has 179 places, 153 transitions, 2015 flow. Second operand 11 states and 264 transitions. [2024-06-21 18:13:24,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 184 transitions, 2515 flow [2024-06-21 18:13:24,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 184 transitions, 2426 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:24,664 INFO L231 Difference]: Finished difference. Result has 186 places, 157 transitions, 2106 flow [2024-06-21 18:13:24,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1926, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2106, PETRI_PLACES=186, PETRI_TRANSITIONS=157} [2024-06-21 18:13:24,664 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-21 18:13:24,665 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 157 transitions, 2106 flow [2024-06-21 18:13:24,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:24,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:24,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:24,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 18:13:24,665 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:24,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:24,666 INFO L85 PathProgramCache]: Analyzing trace with hash 321772705, now seen corresponding path program 6 times [2024-06-21 18:13:24,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:24,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348856390] [2024-06-21 18:13:24,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:24,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:24,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:24,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348856390] [2024-06-21 18:13:24,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348856390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:24,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:24,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:24,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905231028] [2024-06-21 18:13:24,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:24,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:24,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:24,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:24,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:24,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:24,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 157 transitions, 2106 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:24,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:24,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:24,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:25,024 INFO L124 PetriNetUnfolderBase]: 930/1868 cut-off events. [2024-06-21 18:13:25,024 INFO L125 PetriNetUnfolderBase]: For 22554/22558 co-relation queries the response was YES. [2024-06-21 18:13:25,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8494 conditions, 1868 events. 930/1868 cut-off events. For 22554/22558 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 13164 event pairs, 146 based on Foata normal form. 5/1831 useless extension candidates. Maximal degree in co-relation 8416. Up to 1070 conditions per place. [2024-06-21 18:13:25,039 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 106 selfloop transitions, 66 changer transitions 0/182 dead transitions. [2024-06-21 18:13:25,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 182 transitions, 2560 flow [2024-06-21 18:13:25,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:25,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:25,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-21 18:13:25,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-21 18:13:25,041 INFO L175 Difference]: Start difference. First operand has 186 places, 157 transitions, 2106 flow. Second operand 9 states and 222 transitions. [2024-06-21 18:13:25,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 182 transitions, 2560 flow [2024-06-21 18:13:25,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 182 transitions, 2504 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:25,098 INFO L231 Difference]: Finished difference. Result has 190 places, 157 transitions, 2187 flow [2024-06-21 18:13:25,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2187, PETRI_PLACES=190, PETRI_TRANSITIONS=157} [2024-06-21 18:13:25,099 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-21 18:13:25,099 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 157 transitions, 2187 flow [2024-06-21 18:13:25,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:25,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:25,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:25,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 18:13:25,100 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:25,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:25,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2007975765, now seen corresponding path program 3 times [2024-06-21 18:13:25,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:25,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911452928] [2024-06-21 18:13:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:25,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:25,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:25,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911452928] [2024-06-21 18:13:25,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911452928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:25,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:25,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:25,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551344848] [2024-06-21 18:13:25,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:25,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:25,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:25,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:25,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:25,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:25,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 157 transitions, 2187 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:25,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:25,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:25,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:25,477 INFO L124 PetriNetUnfolderBase]: 922/1850 cut-off events. [2024-06-21 18:13:25,477 INFO L125 PetriNetUnfolderBase]: For 22554/22560 co-relation queries the response was YES. [2024-06-21 18:13:25,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8609 conditions, 1850 events. 922/1850 cut-off events. For 22554/22560 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 12951 event pairs, 212 based on Foata normal form. 10/1815 useless extension candidates. Maximal degree in co-relation 8529. Up to 1262 conditions per place. [2024-06-21 18:13:25,489 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 110 selfloop transitions, 61 changer transitions 0/181 dead transitions. [2024-06-21 18:13:25,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 181 transitions, 2583 flow [2024-06-21 18:13:25,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-21 18:13:25,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-21 18:13:25,490 INFO L175 Difference]: Start difference. First operand has 190 places, 157 transitions, 2187 flow. Second operand 10 states and 242 transitions. [2024-06-21 18:13:25,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 181 transitions, 2583 flow [2024-06-21 18:13:25,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 181 transitions, 2449 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:25,538 INFO L231 Difference]: Finished difference. Result has 192 places, 157 transitions, 2181 flow [2024-06-21 18:13:25,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2053, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2181, PETRI_PLACES=192, PETRI_TRANSITIONS=157} [2024-06-21 18:13:25,539 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-21 18:13:25,539 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 157 transitions, 2181 flow [2024-06-21 18:13:25,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:25,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:25,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:25,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 18:13:25,540 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:25,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:25,540 INFO L85 PathProgramCache]: Analyzing trace with hash -983244293, now seen corresponding path program 8 times [2024-06-21 18:13:25,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:25,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263841199] [2024-06-21 18:13:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:25,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:25,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:25,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263841199] [2024-06-21 18:13:25,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263841199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:25,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:25,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:25,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923272843] [2024-06-21 18:13:25,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:25,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:25,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:25,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:25,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:25,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:25,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 157 transitions, 2181 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:25,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:25,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:25,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:25,864 INFO L124 PetriNetUnfolderBase]: 954/1924 cut-off events. [2024-06-21 18:13:25,864 INFO L125 PetriNetUnfolderBase]: For 25330/25334 co-relation queries the response was YES. [2024-06-21 18:13:25,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8906 conditions, 1924 events. 954/1924 cut-off events. For 25330/25334 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 13744 event pairs, 185 based on Foata normal form. 5/1872 useless extension candidates. Maximal degree in co-relation 8825. Up to 1236 conditions per place. [2024-06-21 18:13:25,877 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 117 selfloop transitions, 51 changer transitions 0/178 dead transitions. [2024-06-21 18:13:25,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 178 transitions, 2641 flow [2024-06-21 18:13:25,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:25,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 18:13:25,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-21 18:13:25,878 INFO L175 Difference]: Start difference. First operand has 192 places, 157 transitions, 2181 flow. Second operand 7 states and 176 transitions. [2024-06-21 18:13:25,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 178 transitions, 2641 flow [2024-06-21 18:13:25,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 178 transitions, 2519 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:25,934 INFO L231 Difference]: Finished difference. Result has 191 places, 159 transitions, 2206 flow [2024-06-21 18:13:25,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2206, PETRI_PLACES=191, PETRI_TRANSITIONS=159} [2024-06-21 18:13:25,934 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2024-06-21 18:13:25,935 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 159 transitions, 2206 flow [2024-06-21 18:13:25,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:25,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:25,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:25,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 18:13:25,935 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:25,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:25,936 INFO L85 PathProgramCache]: Analyzing trace with hash 321761359, now seen corresponding path program 9 times [2024-06-21 18:13:25,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:25,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418466743] [2024-06-21 18:13:25,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:25,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:26,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:26,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418466743] [2024-06-21 18:13:26,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418466743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:26,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:26,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:26,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835977832] [2024-06-21 18:13:26,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:26,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:26,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:26,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:26,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:26,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:26,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 159 transitions, 2206 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:26,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:26,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:26,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:26,334 INFO L124 PetriNetUnfolderBase]: 946/1912 cut-off events. [2024-06-21 18:13:26,334 INFO L125 PetriNetUnfolderBase]: For 24726/24730 co-relation queries the response was YES. [2024-06-21 18:13:26,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8838 conditions, 1912 events. 946/1912 cut-off events. For 24726/24730 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 13608 event pairs, 183 based on Foata normal form. 5/1858 useless extension candidates. Maximal degree in co-relation 8755. Up to 1232 conditions per place. [2024-06-21 18:13:26,349 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 119 selfloop transitions, 53 changer transitions 0/182 dead transitions. [2024-06-21 18:13:26,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 182 transitions, 2600 flow [2024-06-21 18:13:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-21 18:13:26,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-21 18:13:26,350 INFO L175 Difference]: Start difference. First operand has 191 places, 159 transitions, 2206 flow. Second operand 9 states and 217 transitions. [2024-06-21 18:13:26,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 182 transitions, 2600 flow [2024-06-21 18:13:26,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 182 transitions, 2503 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:26,408 INFO L231 Difference]: Finished difference. Result has 196 places, 159 transitions, 2219 flow [2024-06-21 18:13:26,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2219, PETRI_PLACES=196, PETRI_TRANSITIONS=159} [2024-06-21 18:13:26,408 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-21 18:13:26,408 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 159 transitions, 2219 flow [2024-06-21 18:13:26,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:26,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:26,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:26,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 18:13:26,409 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:26,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:26,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1316333563, now seen corresponding path program 10 times [2024-06-21 18:13:26,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:26,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681075924] [2024-06-21 18:13:26,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:26,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:26,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:26,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681075924] [2024-06-21 18:13:26,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681075924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:26,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:26,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:26,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799604945] [2024-06-21 18:13:26,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:26,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:26,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:26,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:26,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:26,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:26,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 159 transitions, 2219 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:26,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:26,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:26,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:26,768 INFO L124 PetriNetUnfolderBase]: 938/1916 cut-off events. [2024-06-21 18:13:26,768 INFO L125 PetriNetUnfolderBase]: For 23787/23791 co-relation queries the response was YES. [2024-06-21 18:13:26,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8709 conditions, 1916 events. 938/1916 cut-off events. For 23787/23791 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 13764 event pairs, 103 based on Foata normal form. 5/1876 useless extension candidates. Maximal degree in co-relation 8625. Up to 957 conditions per place. [2024-06-21 18:13:26,779 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 111 selfloop transitions, 58 changer transitions 0/179 dead transitions. [2024-06-21 18:13:26,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 179 transitions, 2667 flow [2024-06-21 18:13:26,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:26,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:26,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 18:13:26,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6541666666666667 [2024-06-21 18:13:26,780 INFO L175 Difference]: Start difference. First operand has 196 places, 159 transitions, 2219 flow. Second operand 6 states and 157 transitions. [2024-06-21 18:13:26,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 179 transitions, 2667 flow [2024-06-21 18:13:26,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 179 transitions, 2541 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:26,829 INFO L231 Difference]: Finished difference. Result has 194 places, 159 transitions, 2218 flow [2024-06-21 18:13:26,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2093, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2218, PETRI_PLACES=194, PETRI_TRANSITIONS=159} [2024-06-21 18:13:26,830 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 153 predicate places. [2024-06-21 18:13:26,830 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 159 transitions, 2218 flow [2024-06-21 18:13:26,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:26,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:26,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:26,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 18:13:26,830 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:26,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:26,831 INFO L85 PathProgramCache]: Analyzing trace with hash -367935265, now seen corresponding path program 4 times [2024-06-21 18:13:26,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:26,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179286558] [2024-06-21 18:13:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:26,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:26,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:26,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179286558] [2024-06-21 18:13:26,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179286558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:26,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:26,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:26,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779552114] [2024-06-21 18:13:26,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:26,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:26,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:26,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:26,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:26,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:26,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 159 transitions, 2218 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:26,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:26,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:26,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:27,197 INFO L124 PetriNetUnfolderBase]: 995/2010 cut-off events. [2024-06-21 18:13:27,197 INFO L125 PetriNetUnfolderBase]: For 30527/30541 co-relation queries the response was YES. [2024-06-21 18:13:27,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9331 conditions, 2010 events. 995/2010 cut-off events. For 30527/30541 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 14373 event pairs, 212 based on Foata normal form. 18/1988 useless extension candidates. Maximal degree in co-relation 9246. Up to 1230 conditions per place. [2024-06-21 18:13:27,212 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 112 selfloop transitions, 66 changer transitions 0/188 dead transitions. [2024-06-21 18:13:27,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 188 transitions, 2772 flow [2024-06-21 18:13:27,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:27,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:27,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 18:13:27,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 18:13:27,214 INFO L175 Difference]: Start difference. First operand has 194 places, 159 transitions, 2218 flow. Second operand 8 states and 200 transitions. [2024-06-21 18:13:27,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 188 transitions, 2772 flow [2024-06-21 18:13:27,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 188 transitions, 2600 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:27,273 INFO L231 Difference]: Finished difference. Result has 196 places, 165 transitions, 2298 flow [2024-06-21 18:13:27,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2298, PETRI_PLACES=196, PETRI_TRANSITIONS=165} [2024-06-21 18:13:27,274 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-21 18:13:27,274 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 165 transitions, 2298 flow [2024-06-21 18:13:27,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:27,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:27,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:27,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 18:13:27,274 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:27,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:27,275 INFO L85 PathProgramCache]: Analyzing trace with hash 732932705, now seen corresponding path program 5 times [2024-06-21 18:13:27,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:27,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377193916] [2024-06-21 18:13:27,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:27,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:27,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:27,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377193916] [2024-06-21 18:13:27,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377193916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:27,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:27,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:27,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199693730] [2024-06-21 18:13:27,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:27,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:27,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:27,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:27,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:27,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:27,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 165 transitions, 2298 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:27,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:27,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:27,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:27,640 INFO L124 PetriNetUnfolderBase]: 1007/2041 cut-off events. [2024-06-21 18:13:27,641 INFO L125 PetriNetUnfolderBase]: For 26890/26896 co-relation queries the response was YES. [2024-06-21 18:13:27,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9410 conditions, 2041 events. 1007/2041 cut-off events. For 26890/26896 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 14755 event pairs, 176 based on Foata normal form. 10/2013 useless extension candidates. Maximal degree in co-relation 9324. Up to 1238 conditions per place. [2024-06-21 18:13:27,656 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 110 selfloop transitions, 71 changer transitions 0/191 dead transitions. [2024-06-21 18:13:27,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 191 transitions, 2792 flow [2024-06-21 18:13:27,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:27,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:27,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 18:13:27,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634375 [2024-06-21 18:13:27,657 INFO L175 Difference]: Start difference. First operand has 196 places, 165 transitions, 2298 flow. Second operand 8 states and 203 transitions. [2024-06-21 18:13:27,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 191 transitions, 2792 flow [2024-06-21 18:13:27,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 191 transitions, 2722 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:27,717 INFO L231 Difference]: Finished difference. Result has 200 places, 166 transitions, 2392 flow [2024-06-21 18:13:27,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2230, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2392, PETRI_PLACES=200, PETRI_TRANSITIONS=166} [2024-06-21 18:13:27,718 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-21 18:13:27,718 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 166 transitions, 2392 flow [2024-06-21 18:13:27,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:27,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:27,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:27,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 18:13:27,718 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:27,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:27,719 INFO L85 PathProgramCache]: Analyzing trace with hash -367935451, now seen corresponding path program 7 times [2024-06-21 18:13:27,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:27,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522200793] [2024-06-21 18:13:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:27,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:27,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:27,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522200793] [2024-06-21 18:13:27,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522200793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:27,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:27,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:27,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472723310] [2024-06-21 18:13:27,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:27,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:27,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:27,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:27,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:27,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:27,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 166 transitions, 2392 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:27,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:27,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:27,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:28,055 INFO L124 PetriNetUnfolderBase]: 1019/2054 cut-off events. [2024-06-21 18:13:28,055 INFO L125 PetriNetUnfolderBase]: For 30083/30097 co-relation queries the response was YES. [2024-06-21 18:13:28,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9745 conditions, 2054 events. 1019/2054 cut-off events. For 30083/30097 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 14747 event pairs, 235 based on Foata normal form. 15/2013 useless extension candidates. Maximal degree in co-relation 9658. Up to 1205 conditions per place. [2024-06-21 18:13:28,070 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 117 selfloop transitions, 55 changer transitions 0/182 dead transitions. [2024-06-21 18:13:28,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 182 transitions, 2841 flow [2024-06-21 18:13:28,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:28,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 18:13:28,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-21 18:13:28,072 INFO L175 Difference]: Start difference. First operand has 200 places, 166 transitions, 2392 flow. Second operand 6 states and 151 transitions. [2024-06-21 18:13:28,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 182 transitions, 2841 flow [2024-06-21 18:13:28,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 182 transitions, 2723 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:28,128 INFO L231 Difference]: Finished difference. Result has 199 places, 167 transitions, 2401 flow [2024-06-21 18:13:28,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2278, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2401, PETRI_PLACES=199, PETRI_TRANSITIONS=167} [2024-06-21 18:13:28,129 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 158 predicate places. [2024-06-21 18:13:28,129 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 167 transitions, 2401 flow [2024-06-21 18:13:28,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:28,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:28,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:28,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 18:13:28,129 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:28,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:28,129 INFO L85 PathProgramCache]: Analyzing trace with hash -375287101, now seen corresponding path program 8 times [2024-06-21 18:13:28,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:28,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476543880] [2024-06-21 18:13:28,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:28,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:28,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:28,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476543880] [2024-06-21 18:13:28,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476543880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:28,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:28,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:28,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531636544] [2024-06-21 18:13:28,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:28,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:28,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:28,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:28,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:28,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:28,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 167 transitions, 2401 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:28,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:28,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:28,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:28,474 INFO L124 PetriNetUnfolderBase]: 1031/2083 cut-off events. [2024-06-21 18:13:28,474 INFO L125 PetriNetUnfolderBase]: For 25951/25955 co-relation queries the response was YES. [2024-06-21 18:13:28,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9770 conditions, 2083 events. 1031/2083 cut-off events. For 25951/25955 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 15064 event pairs, 166 based on Foata normal form. 5/2038 useless extension candidates. Maximal degree in co-relation 9684. Up to 1213 conditions per place. [2024-06-21 18:13:28,490 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 116 selfloop transitions, 65 changer transitions 0/191 dead transitions. [2024-06-21 18:13:28,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 191 transitions, 2886 flow [2024-06-21 18:13:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:28,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:28,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 18:13:28,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.621875 [2024-06-21 18:13:28,491 INFO L175 Difference]: Start difference. First operand has 199 places, 167 transitions, 2401 flow. Second operand 8 states and 199 transitions. [2024-06-21 18:13:28,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 191 transitions, 2886 flow [2024-06-21 18:13:28,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 191 transitions, 2805 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:28,556 INFO L231 Difference]: Finished difference. Result has 204 places, 168 transitions, 2469 flow [2024-06-21 18:13:28,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2321, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2469, PETRI_PLACES=204, PETRI_TRANSITIONS=168} [2024-06-21 18:13:28,556 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-21 18:13:28,556 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 168 transitions, 2469 flow [2024-06-21 18:13:28,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:28,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:28,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:28,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 18:13:28,557 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:28,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:28,557 INFO L85 PathProgramCache]: Analyzing trace with hash -375298447, now seen corresponding path program 11 times [2024-06-21 18:13:28,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:28,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047698994] [2024-06-21 18:13:28,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:28,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:28,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:28,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047698994] [2024-06-21 18:13:28,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047698994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:28,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:28,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:28,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007601465] [2024-06-21 18:13:28,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:28,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:28,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:28,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:28,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:28,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:28,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 168 transitions, 2469 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:28,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:28,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:28,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:28,922 INFO L124 PetriNetUnfolderBase]: 1023/2065 cut-off events. [2024-06-21 18:13:28,922 INFO L125 PetriNetUnfolderBase]: For 25578/25582 co-relation queries the response was YES. [2024-06-21 18:13:28,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9709 conditions, 2065 events. 1023/2065 cut-off events. For 25578/25582 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 14948 event pairs, 135 based on Foata normal form. 5/2016 useless extension candidates. Maximal degree in co-relation 9622. Up to 1073 conditions per place. [2024-06-21 18:13:28,937 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 120 selfloop transitions, 68 changer transitions 0/198 dead transitions. [2024-06-21 18:13:28,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 198 transitions, 2915 flow [2024-06-21 18:13:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:28,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:28,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 18:13:28,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-06-21 18:13:28,938 INFO L175 Difference]: Start difference. First operand has 204 places, 168 transitions, 2469 flow. Second operand 8 states and 206 transitions. [2024-06-21 18:13:28,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 198 transitions, 2915 flow [2024-06-21 18:13:28,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 198 transitions, 2771 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:29,001 INFO L231 Difference]: Finished difference. Result has 205 places, 168 transitions, 2471 flow [2024-06-21 18:13:29,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2471, PETRI_PLACES=205, PETRI_TRANSITIONS=168} [2024-06-21 18:13:29,002 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-21 18:13:29,002 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 168 transitions, 2471 flow [2024-06-21 18:13:29,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:29,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:29,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:29,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 18:13:29,002 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:29,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:29,003 INFO L85 PathProgramCache]: Analyzing trace with hash 732938285, now seen corresponding path program 6 times [2024-06-21 18:13:29,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:29,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251265103] [2024-06-21 18:13:29,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:29,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:29,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:29,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251265103] [2024-06-21 18:13:29,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251265103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:29,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:29,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:29,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589263445] [2024-06-21 18:13:29,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:29,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:29,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:29,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:29,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:29,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:29,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 168 transitions, 2471 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:29,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:29,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:29,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:29,360 INFO L124 PetriNetUnfolderBase]: 1015/2069 cut-off events. [2024-06-21 18:13:29,361 INFO L125 PetriNetUnfolderBase]: For 23846/23852 co-relation queries the response was YES. [2024-06-21 18:13:29,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9563 conditions, 2069 events. 1015/2069 cut-off events. For 23846/23852 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15078 event pairs, 176 based on Foata normal form. 10/2042 useless extension candidates. Maximal degree in co-relation 9476. Up to 1262 conditions per place. [2024-06-21 18:13:29,375 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 116 selfloop transitions, 71 changer transitions 0/197 dead transitions. [2024-06-21 18:13:29,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 197 transitions, 2911 flow [2024-06-21 18:13:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:29,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-21 18:13:29,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-21 18:13:29,376 INFO L175 Difference]: Start difference. First operand has 205 places, 168 transitions, 2471 flow. Second operand 10 states and 246 transitions. [2024-06-21 18:13:29,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 197 transitions, 2911 flow [2024-06-21 18:13:29,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 197 transitions, 2763 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:29,430 INFO L231 Difference]: Finished difference. Result has 206 places, 168 transitions, 2477 flow [2024-06-21 18:13:29,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2323, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2477, PETRI_PLACES=206, PETRI_TRANSITIONS=168} [2024-06-21 18:13:29,431 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-21 18:13:29,431 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 168 transitions, 2477 flow [2024-06-21 18:13:29,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:29,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:29,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:29,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 18:13:29,432 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:29,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:29,432 INFO L85 PathProgramCache]: Analyzing trace with hash -375298261, now seen corresponding path program 9 times [2024-06-21 18:13:29,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:29,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474238729] [2024-06-21 18:13:29,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:29,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:29,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:29,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474238729] [2024-06-21 18:13:29,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474238729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:29,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:29,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:29,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400328774] [2024-06-21 18:13:29,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:29,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:29,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:29,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:29,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:29,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:29,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 168 transitions, 2477 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:29,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:29,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:29,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:29,827 INFO L124 PetriNetUnfolderBase]: 1007/2017 cut-off events. [2024-06-21 18:13:29,827 INFO L125 PetriNetUnfolderBase]: For 20864/20868 co-relation queries the response was YES. [2024-06-21 18:13:29,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9326 conditions, 2017 events. 1007/2017 cut-off events. For 20864/20868 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 14296 event pairs, 183 based on Foata normal form. 5/1977 useless extension candidates. Maximal degree in co-relation 9240. Up to 1185 conditions per place. [2024-06-21 18:13:29,842 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 113 selfloop transitions, 72 changer transitions 0/195 dead transitions. [2024-06-21 18:13:29,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 195 transitions, 2907 flow [2024-06-21 18:13:29,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:29,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:29,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-21 18:13:29,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138888888888889 [2024-06-21 18:13:29,843 INFO L175 Difference]: Start difference. First operand has 206 places, 168 transitions, 2477 flow. Second operand 9 states and 221 transitions. [2024-06-21 18:13:29,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 195 transitions, 2907 flow [2024-06-21 18:13:29,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 195 transitions, 2702 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-21 18:13:29,896 INFO L231 Difference]: Finished difference. Result has 202 places, 168 transitions, 2424 flow [2024-06-21 18:13:29,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2272, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2424, PETRI_PLACES=202, PETRI_TRANSITIONS=168} [2024-06-21 18:13:29,897 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-21 18:13:29,897 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 168 transitions, 2424 flow [2024-06-21 18:13:29,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:29,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:29,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:29,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 18:13:29,897 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:29,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:29,898 INFO L85 PathProgramCache]: Analyzing trace with hash -488614115, now seen corresponding path program 7 times [2024-06-21 18:13:29,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:29,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98000435] [2024-06-21 18:13:29,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:29,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:29,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:29,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:29,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98000435] [2024-06-21 18:13:29,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98000435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:29,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:29,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:29,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308575492] [2024-06-21 18:13:29,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:29,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:29,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:29,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:29,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:30,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:30,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 168 transitions, 2424 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:30,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:30,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:30,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:30,247 INFO L124 PetriNetUnfolderBase]: 1019/2097 cut-off events. [2024-06-21 18:13:30,248 INFO L125 PetriNetUnfolderBase]: For 19090/19096 co-relation queries the response was YES. [2024-06-21 18:13:30,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9325 conditions, 2097 events. 1019/2097 cut-off events. For 19090/19096 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 15518 event pairs, 195 based on Foata normal form. 10/2051 useless extension candidates. Maximal degree in co-relation 9241. Up to 1011 conditions per place. [2024-06-21 18:13:30,263 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 117 selfloop transitions, 70 changer transitions 0/197 dead transitions. [2024-06-21 18:13:30,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 197 transitions, 2930 flow [2024-06-21 18:13:30,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:30,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:30,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 18:13:30,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-21 18:13:30,264 INFO L175 Difference]: Start difference. First operand has 202 places, 168 transitions, 2424 flow. Second operand 8 states and 202 transitions. [2024-06-21 18:13:30,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 197 transitions, 2930 flow [2024-06-21 18:13:30,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 197 transitions, 2752 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 18:13:30,311 INFO L231 Difference]: Finished difference. Result has 200 places, 169 transitions, 2404 flow [2024-06-21 18:13:30,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2250, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2404, PETRI_PLACES=200, PETRI_TRANSITIONS=169} [2024-06-21 18:13:30,311 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-21 18:13:30,311 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 169 transitions, 2404 flow [2024-06-21 18:13:30,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:30,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:30,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:30,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 18:13:30,312 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:30,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:30,312 INFO L85 PathProgramCache]: Analyzing trace with hash 2115411233, now seen corresponding path program 10 times [2024-06-21 18:13:30,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:30,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054079286] [2024-06-21 18:13:30,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:30,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:30,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:30,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054079286] [2024-06-21 18:13:30,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054079286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:30,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:30,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:30,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808469854] [2024-06-21 18:13:30,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:30,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:30,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:30,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:30,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:30,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:30,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 169 transitions, 2404 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:30,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:30,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:30,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:30,621 INFO L124 PetriNetUnfolderBase]: 1031/2099 cut-off events. [2024-06-21 18:13:30,621 INFO L125 PetriNetUnfolderBase]: For 18431/18435 co-relation queries the response was YES. [2024-06-21 18:13:30,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9342 conditions, 2099 events. 1031/2099 cut-off events. For 18431/18435 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 15398 event pairs, 202 based on Foata normal form. 5/2049 useless extension candidates. Maximal degree in co-relation 9259. Up to 1113 conditions per place. [2024-06-21 18:13:30,635 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 119 selfloop transitions, 64 changer transitions 0/193 dead transitions. [2024-06-21 18:13:30,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 193 transitions, 2886 flow [2024-06-21 18:13:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:30,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:30,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 18:13:30,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-21 18:13:30,636 INFO L175 Difference]: Start difference. First operand has 200 places, 169 transitions, 2404 flow. Second operand 8 states and 197 transitions. [2024-06-21 18:13:30,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 193 transitions, 2886 flow [2024-06-21 18:13:30,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 193 transitions, 2775 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:30,681 INFO L231 Difference]: Finished difference. Result has 203 places, 170 transitions, 2435 flow [2024-06-21 18:13:30,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2293, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2435, PETRI_PLACES=203, PETRI_TRANSITIONS=170} [2024-06-21 18:13:30,681 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-21 18:13:30,681 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 170 transitions, 2435 flow [2024-06-21 18:13:30,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:30,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:30,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:30,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 18:13:30,682 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:30,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:30,682 INFO L85 PathProgramCache]: Analyzing trace with hash 2110286189, now seen corresponding path program 8 times [2024-06-21 18:13:30,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:30,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339806434] [2024-06-21 18:13:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:30,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:30,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:30,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339806434] [2024-06-21 18:13:30,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339806434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:30,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:30,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:30,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966071864] [2024-06-21 18:13:30,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:30,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:30,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:30,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:30,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:30,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:30,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 170 transitions, 2435 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:30,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:30,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:30,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:31,073 INFO L124 PetriNetUnfolderBase]: 1083/2197 cut-off events. [2024-06-21 18:13:31,073 INFO L125 PetriNetUnfolderBase]: For 22612/22618 co-relation queries the response was YES. [2024-06-21 18:13:31,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9902 conditions, 2197 events. 1083/2197 cut-off events. For 22612/22618 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 16269 event pairs, 247 based on Foata normal form. 10/2134 useless extension candidates. Maximal degree in co-relation 9818. Up to 1405 conditions per place. [2024-06-21 18:13:31,087 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 127 selfloop transitions, 62 changer transitions 0/199 dead transitions. [2024-06-21 18:13:31,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 199 transitions, 3014 flow [2024-06-21 18:13:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:31,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:31,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 18:13:31,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-21 18:13:31,088 INFO L175 Difference]: Start difference. First operand has 203 places, 170 transitions, 2435 flow. Second operand 8 states and 202 transitions. [2024-06-21 18:13:31,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 199 transitions, 3014 flow [2024-06-21 18:13:31,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 199 transitions, 2870 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:31,141 INFO L231 Difference]: Finished difference. Result has 206 places, 173 transitions, 2456 flow [2024-06-21 18:13:31,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2456, PETRI_PLACES=206, PETRI_TRANSITIONS=173} [2024-06-21 18:13:31,142 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-21 18:13:31,142 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 173 transitions, 2456 flow [2024-06-21 18:13:31,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:31,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:31,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:31,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 18:13:31,143 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:31,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:31,143 INFO L85 PathProgramCache]: Analyzing trace with hash 2115648569, now seen corresponding path program 9 times [2024-06-21 18:13:31,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:31,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047554180] [2024-06-21 18:13:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:31,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:31,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:31,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047554180] [2024-06-21 18:13:31,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047554180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:31,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:31,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:31,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181379711] [2024-06-21 18:13:31,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:31,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:31,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:31,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:31,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:31,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:31,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 173 transitions, 2456 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:31,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:31,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:31,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:31,499 INFO L124 PetriNetUnfolderBase]: 1095/2213 cut-off events. [2024-06-21 18:13:31,499 INFO L125 PetriNetUnfolderBase]: For 23609/23615 co-relation queries the response was YES. [2024-06-21 18:13:31,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9984 conditions, 2213 events. 1095/2213 cut-off events. For 23609/23615 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 16292 event pairs, 255 based on Foata normal form. 10/2149 useless extension candidates. Maximal degree in co-relation 9898. Up to 1413 conditions per place. [2024-06-21 18:13:31,516 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 127 selfloop transitions, 66 changer transitions 0/203 dead transitions. [2024-06-21 18:13:31,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 203 transitions, 3037 flow [2024-06-21 18:13:31,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:31,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:31,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-21 18:13:31,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-21 18:13:31,517 INFO L175 Difference]: Start difference. First operand has 206 places, 173 transitions, 2456 flow. Second operand 10 states and 244 transitions. [2024-06-21 18:13:31,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 203 transitions, 3037 flow [2024-06-21 18:13:31,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 203 transitions, 2970 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:31,576 INFO L231 Difference]: Finished difference. Result has 213 places, 174 transitions, 2536 flow [2024-06-21 18:13:31,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2536, PETRI_PLACES=213, PETRI_TRANSITIONS=174} [2024-06-21 18:13:31,577 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-21 18:13:31,577 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 174 transitions, 2536 flow [2024-06-21 18:13:31,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:31,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:31,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:31,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 18:13:31,578 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:31,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:31,578 INFO L85 PathProgramCache]: Analyzing trace with hash 2109870479, now seen corresponding path program 10 times [2024-06-21 18:13:31,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:31,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433070044] [2024-06-21 18:13:31,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:31,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:31,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:31,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433070044] [2024-06-21 18:13:31,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433070044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:31,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:31,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:31,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677905734] [2024-06-21 18:13:31,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:31,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:31,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:31,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:31,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:31,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:31,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 174 transitions, 2536 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:31,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:31,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:31,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:32,012 INFO L124 PetriNetUnfolderBase]: 1087/2221 cut-off events. [2024-06-21 18:13:32,012 INFO L125 PetriNetUnfolderBase]: For 22513/22519 co-relation queries the response was YES. [2024-06-21 18:13:32,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10083 conditions, 2221 events. 1087/2221 cut-off events. For 22513/22519 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 16544 event pairs, 313 based on Foata normal form. 10/2144 useless extension candidates. Maximal degree in co-relation 9995. Up to 1645 conditions per place. [2024-06-21 18:13:32,027 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 143 selfloop transitions, 40 changer transitions 0/193 dead transitions. [2024-06-21 18:13:32,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 193 transitions, 2946 flow [2024-06-21 18:13:32,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:32,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:32,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 18:13:32,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-21 18:13:32,028 INFO L175 Difference]: Start difference. First operand has 213 places, 174 transitions, 2536 flow. Second operand 8 states and 195 transitions. [2024-06-21 18:13:32,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 193 transitions, 2946 flow [2024-06-21 18:13:32,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 193 transitions, 2798 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:32,089 INFO L231 Difference]: Finished difference. Result has 213 places, 174 transitions, 2472 flow [2024-06-21 18:13:32,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2472, PETRI_PLACES=213, PETRI_TRANSITIONS=174} [2024-06-21 18:13:32,090 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-21 18:13:32,090 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 174 transitions, 2472 flow [2024-06-21 18:13:32,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:32,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:32,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:32,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 18:13:32,090 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:32,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:32,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2130067899, now seen corresponding path program 11 times [2024-06-21 18:13:32,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:32,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273041285] [2024-06-21 18:13:32,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:32,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:32,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:32,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273041285] [2024-06-21 18:13:32,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273041285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:32,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:32,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:32,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773514738] [2024-06-21 18:13:32,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:32,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:32,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:32,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:32,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:32,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:32,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 174 transitions, 2472 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:32,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:32,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:32,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:32,465 INFO L124 PetriNetUnfolderBase]: 1079/2181 cut-off events. [2024-06-21 18:13:32,465 INFO L125 PetriNetUnfolderBase]: For 20669/20675 co-relation queries the response was YES. [2024-06-21 18:13:32,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9740 conditions, 2181 events. 1079/2181 cut-off events. For 20669/20675 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 16026 event pairs, 251 based on Foata normal form. 10/2126 useless extension candidates. Maximal degree in co-relation 9651. Up to 1405 conditions per place. [2024-06-21 18:13:32,480 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 125 selfloop transitions, 68 changer transitions 0/203 dead transitions. [2024-06-21 18:13:32,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 203 transitions, 2922 flow [2024-06-21 18:13:32,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:13:32,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:13:32,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 262 transitions. [2024-06-21 18:13:32,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5954545454545455 [2024-06-21 18:13:32,481 INFO L175 Difference]: Start difference. First operand has 213 places, 174 transitions, 2472 flow. Second operand 11 states and 262 transitions. [2024-06-21 18:13:32,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 203 transitions, 2922 flow [2024-06-21 18:13:32,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 203 transitions, 2816 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:32,538 INFO L231 Difference]: Finished difference. Result has 216 places, 174 transitions, 2506 flow [2024-06-21 18:13:32,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2366, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2506, PETRI_PLACES=216, PETRI_TRANSITIONS=174} [2024-06-21 18:13:32,539 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-21 18:13:32,539 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 174 transitions, 2506 flow [2024-06-21 18:13:32,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:32,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:32,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:32,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 18:13:32,539 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:32,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:32,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2044672207, now seen corresponding path program 12 times [2024-06-21 18:13:32,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:32,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154893245] [2024-06-21 18:13:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:32,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:32,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:32,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154893245] [2024-06-21 18:13:32,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154893245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:32,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:32,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:32,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880575718] [2024-06-21 18:13:32,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:32,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:32,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:32,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:32,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:32,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:32,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 174 transitions, 2506 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:32,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:32,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:32,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:32,925 INFO L124 PetriNetUnfolderBase]: 1071/2209 cut-off events. [2024-06-21 18:13:32,925 INFO L125 PetriNetUnfolderBase]: For 19207/19213 co-relation queries the response was YES. [2024-06-21 18:13:32,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9732 conditions, 2209 events. 1071/2209 cut-off events. For 19207/19213 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 16591 event pairs, 236 based on Foata normal form. 10/2148 useless extension candidates. Maximal degree in co-relation 9643. Up to 1519 conditions per place. [2024-06-21 18:13:32,943 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 139 selfloop transitions, 49 changer transitions 0/198 dead transitions. [2024-06-21 18:13:32,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 198 transitions, 2940 flow [2024-06-21 18:13:32,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:32,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 18:13:32,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464285714285715 [2024-06-21 18:13:32,944 INFO L175 Difference]: Start difference. First operand has 216 places, 174 transitions, 2506 flow. Second operand 7 states and 181 transitions. [2024-06-21 18:13:32,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 198 transitions, 2940 flow [2024-06-21 18:13:33,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 198 transitions, 2795 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 18:13:33,005 INFO L231 Difference]: Finished difference. Result has 213 places, 174 transitions, 2465 flow [2024-06-21 18:13:33,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2465, PETRI_PLACES=213, PETRI_TRANSITIONS=174} [2024-06-21 18:13:33,005 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-21 18:13:33,006 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 174 transitions, 2465 flow [2024-06-21 18:13:33,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:33,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:33,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:33,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 18:13:33,006 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:33,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:33,006 INFO L85 PathProgramCache]: Analyzing trace with hash 553705567, now seen corresponding path program 13 times [2024-06-21 18:13:33,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:33,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118368769] [2024-06-21 18:13:33,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:33,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:33,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:33,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118368769] [2024-06-21 18:13:33,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118368769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:33,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:33,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:33,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744439642] [2024-06-21 18:13:33,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:33,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:33,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:33,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:33,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:33,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:33,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 174 transitions, 2465 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:33,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:33,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:33,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:33,395 INFO L124 PetriNetUnfolderBase]: 1083/2232 cut-off events. [2024-06-21 18:13:33,395 INFO L125 PetriNetUnfolderBase]: For 22221/22235 co-relation queries the response was YES. [2024-06-21 18:13:33,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9730 conditions, 2232 events. 1083/2232 cut-off events. For 22221/22235 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 16809 event pairs, 181 based on Foata normal form. 18/2204 useless extension candidates. Maximal degree in co-relation 9640. Up to 1143 conditions per place. [2024-06-21 18:13:33,408 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 107 selfloop transitions, 86 changer transitions 0/203 dead transitions. [2024-06-21 18:13:33,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 203 transitions, 2992 flow [2024-06-21 18:13:33,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:33,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:33,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-21 18:13:33,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025 [2024-06-21 18:13:33,409 INFO L175 Difference]: Start difference. First operand has 213 places, 174 transitions, 2465 flow. Second operand 10 states and 241 transitions. [2024-06-21 18:13:33,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 203 transitions, 2992 flow [2024-06-21 18:13:33,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 203 transitions, 2782 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:33,464 INFO L231 Difference]: Finished difference. Result has 214 places, 175 transitions, 2444 flow [2024-06-21 18:13:33,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2257, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2444, PETRI_PLACES=214, PETRI_TRANSITIONS=175} [2024-06-21 18:13:33,465 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-21 18:13:33,465 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 175 transitions, 2444 flow [2024-06-21 18:13:33,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:33,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:33,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:33,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 18:13:33,465 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:33,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:33,466 INFO L85 PathProgramCache]: Analyzing trace with hash -2038894117, now seen corresponding path program 14 times [2024-06-21 18:13:33,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:33,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111527725] [2024-06-21 18:13:33,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:33,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:33,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:33,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111527725] [2024-06-21 18:13:33,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111527725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:33,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:33,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:33,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639688915] [2024-06-21 18:13:33,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:33,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:33,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:33,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:33,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:33,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:33,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 175 transitions, 2444 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:33,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:33,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:33,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:33,824 INFO L124 PetriNetUnfolderBase]: 1135/2317 cut-off events. [2024-06-21 18:13:33,825 INFO L125 PetriNetUnfolderBase]: For 24518/24524 co-relation queries the response was YES. [2024-06-21 18:13:33,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10190 conditions, 2317 events. 1135/2317 cut-off events. For 24518/24524 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 17446 event pairs, 191 based on Foata normal form. 10/2267 useless extension candidates. Maximal degree in co-relation 10102. Up to 1175 conditions per place. [2024-06-21 18:13:33,842 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 115 selfloop transitions, 86 changer transitions 0/211 dead transitions. [2024-06-21 18:13:33,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 211 transitions, 3163 flow [2024-06-21 18:13:33,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-21 18:13:33,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-21 18:13:33,843 INFO L175 Difference]: Start difference. First operand has 214 places, 175 transitions, 2444 flow. Second operand 9 states and 228 transitions. [2024-06-21 18:13:33,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 211 transitions, 3163 flow [2024-06-21 18:13:33,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 211 transitions, 2893 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:33,907 INFO L231 Difference]: Finished difference. Result has 214 places, 178 transitions, 2391 flow [2024-06-21 18:13:33,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2192, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2391, PETRI_PLACES=214, PETRI_TRANSITIONS=178} [2024-06-21 18:13:33,908 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-21 18:13:33,908 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 178 transitions, 2391 flow [2024-06-21 18:13:33,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:33,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:33,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:33,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 18:13:33,909 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:33,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:33,909 INFO L85 PathProgramCache]: Analyzing trace with hash 730836901, now seen corresponding path program 11 times [2024-06-21 18:13:33,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:33,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081021747] [2024-06-21 18:13:33,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:33,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:33,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:33,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081021747] [2024-06-21 18:13:33,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081021747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:33,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:33,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:33,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079938260] [2024-06-21 18:13:33,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:33,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:33,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:33,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:33,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:34,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:34,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 178 transitions, 2391 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:34,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:34,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:34,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:34,264 INFO L124 PetriNetUnfolderBase]: 1167/2394 cut-off events. [2024-06-21 18:13:34,264 INFO L125 PetriNetUnfolderBase]: For 29842/29854 co-relation queries the response was YES. [2024-06-21 18:13:34,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10198 conditions, 2394 events. 1167/2394 cut-off events. For 29842/29854 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 18358 event pairs, 255 based on Foata normal form. 13/2335 useless extension candidates. Maximal degree in co-relation 10110. Up to 1305 conditions per place. [2024-06-21 18:13:34,281 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 125 selfloop transitions, 63 changer transitions 0/198 dead transitions. [2024-06-21 18:13:34,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 198 transitions, 2965 flow [2024-06-21 18:13:34,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:34,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:34,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 18:13:34,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-21 18:13:34,282 INFO L175 Difference]: Start difference. First operand has 214 places, 178 transitions, 2391 flow. Second operand 7 states and 171 transitions. [2024-06-21 18:13:34,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 198 transitions, 2965 flow [2024-06-21 18:13:34,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 198 transitions, 2844 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:34,354 INFO L231 Difference]: Finished difference. Result has 216 places, 180 transitions, 2424 flow [2024-06-21 18:13:34,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2274, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2424, PETRI_PLACES=216, PETRI_TRANSITIONS=180} [2024-06-21 18:13:34,354 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-21 18:13:34,354 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 180 transitions, 2424 flow [2024-06-21 18:13:34,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:34,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:34,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:34,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 18:13:34,355 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:34,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:34,355 INFO L85 PathProgramCache]: Analyzing trace with hash 724407811, now seen corresponding path program 12 times [2024-06-21 18:13:34,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:34,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847300927] [2024-06-21 18:13:34,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:34,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:34,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:34,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847300927] [2024-06-21 18:13:34,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847300927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:34,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:34,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:34,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105820151] [2024-06-21 18:13:34,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:34,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:34,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:34,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:34,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:34,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:34,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 180 transitions, 2424 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:34,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:34,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:34,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:34,731 INFO L124 PetriNetUnfolderBase]: 1179/2406 cut-off events. [2024-06-21 18:13:34,732 INFO L125 PetriNetUnfolderBase]: For 29930/29942 co-relation queries the response was YES. [2024-06-21 18:13:34,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10275 conditions, 2406 events. 1179/2406 cut-off events. For 29930/29942 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 18402 event pairs, 251 based on Foata normal form. 13/2345 useless extension candidates. Maximal degree in co-relation 10187. Up to 1313 conditions per place. [2024-06-21 18:13:34,747 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 126 selfloop transitions, 64 changer transitions 0/200 dead transitions. [2024-06-21 18:13:34,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 200 transitions, 2996 flow [2024-06-21 18:13:34,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:34,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:34,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 18:13:34,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-21 18:13:34,748 INFO L175 Difference]: Start difference. First operand has 216 places, 180 transitions, 2424 flow. Second operand 7 states and 172 transitions. [2024-06-21 18:13:34,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 200 transitions, 2996 flow [2024-06-21 18:13:34,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 200 transitions, 2911 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:34,824 INFO L231 Difference]: Finished difference. Result has 220 places, 181 transitions, 2483 flow [2024-06-21 18:13:34,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2483, PETRI_PLACES=220, PETRI_TRANSITIONS=181} [2024-06-21 18:13:34,825 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-21 18:13:34,825 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 181 transitions, 2483 flow [2024-06-21 18:13:34,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:34,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:34,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:34,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 18:13:34,825 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:34,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:34,826 INFO L85 PathProgramCache]: Analyzing trace with hash 2103238591, now seen corresponding path program 15 times [2024-06-21 18:13:34,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:34,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485657864] [2024-06-21 18:13:34,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:34,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:34,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:34,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485657864] [2024-06-21 18:13:34,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485657864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:34,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:34,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:34,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058636038] [2024-06-21 18:13:34,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:34,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:34,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:34,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:34,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:34,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:34,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 181 transitions, 2483 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:34,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:34,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:34,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:35,214 INFO L124 PetriNetUnfolderBase]: 1171/2405 cut-off events. [2024-06-21 18:13:35,214 INFO L125 PetriNetUnfolderBase]: For 27064/27070 co-relation queries the response was YES. [2024-06-21 18:13:35,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10183 conditions, 2405 events. 1171/2405 cut-off events. For 27064/27070 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 18397 event pairs, 191 based on Foata normal form. 10/2351 useless extension candidates. Maximal degree in co-relation 10094. Up to 1243 conditions per place. [2024-06-21 18:13:35,230 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 117 selfloop transitions, 80 changer transitions 0/207 dead transitions. [2024-06-21 18:13:35,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 207 transitions, 3009 flow [2024-06-21 18:13:35,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:35,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:35,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 18:13:35,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 18:13:35,231 INFO L175 Difference]: Start difference. First operand has 220 places, 181 transitions, 2483 flow. Second operand 7 states and 182 transitions. [2024-06-21 18:13:35,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 207 transitions, 3009 flow [2024-06-21 18:13:35,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 207 transitions, 2835 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:35,307 INFO L231 Difference]: Finished difference. Result has 222 places, 181 transitions, 2475 flow [2024-06-21 18:13:35,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2309, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2475, PETRI_PLACES=222, PETRI_TRANSITIONS=181} [2024-06-21 18:13:35,308 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-21 18:13:35,308 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 181 transitions, 2475 flow [2024-06-21 18:13:35,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:35,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:35,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:35,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 18:13:35,309 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:35,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:35,309 INFO L85 PathProgramCache]: Analyzing trace with hash 553700731, now seen corresponding path program 13 times [2024-06-21 18:13:35,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:35,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627390745] [2024-06-21 18:13:35,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:35,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:35,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:35,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627390745] [2024-06-21 18:13:35,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627390745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:35,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:35,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:35,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853295959] [2024-06-21 18:13:35,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:35,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:35,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:35,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:35,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:35,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:35,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 181 transitions, 2475 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:35,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:35,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:35,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:35,690 INFO L124 PetriNetUnfolderBase]: 1163/2387 cut-off events. [2024-06-21 18:13:35,690 INFO L125 PetriNetUnfolderBase]: For 25880/25884 co-relation queries the response was YES. [2024-06-21 18:13:35,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9868 conditions, 2387 events. 1163/2387 cut-off events. For 25880/25884 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 18223 event pairs, 286 based on Foata normal form. 5/2304 useless extension candidates. Maximal degree in co-relation 9779. Up to 1742 conditions per place. [2024-06-21 18:13:35,705 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 169 selfloop transitions, 18 changer transitions 0/197 dead transitions. [2024-06-21 18:13:35,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 197 transitions, 2883 flow [2024-06-21 18:13:35,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:35,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 18:13:35,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-21 18:13:35,706 INFO L175 Difference]: Start difference. First operand has 222 places, 181 transitions, 2475 flow. Second operand 7 states and 166 transitions. [2024-06-21 18:13:35,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 197 transitions, 2883 flow [2024-06-21 18:13:35,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 197 transitions, 2707 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:35,771 INFO L231 Difference]: Finished difference. Result has 222 places, 181 transitions, 2339 flow [2024-06-21 18:13:35,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2339, PETRI_PLACES=222, PETRI_TRANSITIONS=181} [2024-06-21 18:13:35,771 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-21 18:13:35,772 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 181 transitions, 2339 flow [2024-06-21 18:13:35,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:35,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:35,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:35,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 18:13:35,772 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:35,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:35,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2039131267, now seen corresponding path program 16 times [2024-06-21 18:13:35,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:35,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424950753] [2024-06-21 18:13:35,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:35,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:35,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:35,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424950753] [2024-06-21 18:13:35,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424950753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:35,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:35,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:35,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096927816] [2024-06-21 18:13:35,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:35,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:35,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:35,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:35,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:35,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:35,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 181 transitions, 2339 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:35,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:35,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:35,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:36,275 INFO L124 PetriNetUnfolderBase]: 1155/2365 cut-off events. [2024-06-21 18:13:36,275 INFO L125 PetriNetUnfolderBase]: For 21488/21494 co-relation queries the response was YES. [2024-06-21 18:13:36,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9345 conditions, 2365 events. 1155/2365 cut-off events. For 21488/21494 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 17973 event pairs, 183 based on Foata normal form. 10/2326 useless extension candidates. Maximal degree in co-relation 9256. Up to 1227 conditions per place. [2024-06-21 18:13:36,293 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 114 selfloop transitions, 90 changer transitions 0/214 dead transitions. [2024-06-21 18:13:36,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 214 transitions, 2895 flow [2024-06-21 18:13:36,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:36,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:36,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-21 18:13:36,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-21 18:13:36,294 INFO L175 Difference]: Start difference. First operand has 222 places, 181 transitions, 2339 flow. Second operand 10 states and 246 transitions. [2024-06-21 18:13:36,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 214 transitions, 2895 flow [2024-06-21 18:13:36,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 214 transitions, 2789 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:36,359 INFO L231 Difference]: Finished difference. Result has 223 places, 181 transitions, 2419 flow [2024-06-21 18:13:36,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2419, PETRI_PLACES=223, PETRI_TRANSITIONS=181} [2024-06-21 18:13:36,360 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 182 predicate places. [2024-06-21 18:13:36,360 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 181 transitions, 2419 flow [2024-06-21 18:13:36,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:36,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:36,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:36,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 18:13:36,361 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:36,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:36,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2108363635, now seen corresponding path program 14 times [2024-06-21 18:13:36,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:36,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941861041] [2024-06-21 18:13:36,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:36,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:36,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:36,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941861041] [2024-06-21 18:13:36,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941861041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:36,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:36,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:36,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68029428] [2024-06-21 18:13:36,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:36,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:36,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:36,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:36,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:36,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:36,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 181 transitions, 2419 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:36,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:36,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:36,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:36,705 INFO L124 PetriNetUnfolderBase]: 1147/2339 cut-off events. [2024-06-21 18:13:36,705 INFO L125 PetriNetUnfolderBase]: For 19880/19884 co-relation queries the response was YES. [2024-06-21 18:13:36,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9415 conditions, 2339 events. 1147/2339 cut-off events. For 19880/19884 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 17636 event pairs, 216 based on Foata normal form. 5/2287 useless extension candidates. Maximal degree in co-relation 9327. Up to 1281 conditions per place. [2024-06-21 18:13:36,721 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 122 selfloop transitions, 69 changer transitions 0/201 dead transitions. [2024-06-21 18:13:36,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 201 transitions, 2845 flow [2024-06-21 18:13:36,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 18:13:36,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-21 18:13:36,722 INFO L175 Difference]: Start difference. First operand has 223 places, 181 transitions, 2419 flow. Second operand 7 states and 173 transitions. [2024-06-21 18:13:36,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 201 transitions, 2845 flow [2024-06-21 18:13:36,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 201 transitions, 2647 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 18:13:36,778 INFO L231 Difference]: Finished difference. Result has 220 places, 181 transitions, 2365 flow [2024-06-21 18:13:36,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2221, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2365, PETRI_PLACES=220, PETRI_TRANSITIONS=181} [2024-06-21 18:13:36,778 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-21 18:13:36,778 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 181 transitions, 2365 flow [2024-06-21 18:13:36,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:36,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:36,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:36,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 18:13:36,779 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:36,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:36,779 INFO L85 PathProgramCache]: Analyzing trace with hash 730837087, now seen corresponding path program 17 times [2024-06-21 18:13:36,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:36,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907741692] [2024-06-21 18:13:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:36,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:36,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:36,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907741692] [2024-06-21 18:13:36,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907741692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:36,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:36,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:36,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078314121] [2024-06-21 18:13:36,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:36,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:36,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:36,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:36,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:36,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:36,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 181 transitions, 2365 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:36,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:36,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:36,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:37,209 INFO L124 PetriNetUnfolderBase]: 1159/2392 cut-off events. [2024-06-21 18:13:37,209 INFO L125 PetriNetUnfolderBase]: For 22043/22057 co-relation queries the response was YES. [2024-06-21 18:13:37,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9382 conditions, 2392 events. 1159/2392 cut-off events. For 22043/22057 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 18385 event pairs, 203 based on Foata normal form. 18/2344 useless extension candidates. Maximal degree in co-relation 9294. Up to 1223 conditions per place. [2024-06-21 18:13:37,222 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 118 selfloop transitions, 85 changer transitions 0/213 dead transitions. [2024-06-21 18:13:37,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 213 transitions, 2923 flow [2024-06-21 18:13:37,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:13:37,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:13:37,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 263 transitions. [2024-06-21 18:13:37,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5977272727272728 [2024-06-21 18:13:37,223 INFO L175 Difference]: Start difference. First operand has 220 places, 181 transitions, 2365 flow. Second operand 11 states and 263 transitions. [2024-06-21 18:13:37,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 213 transitions, 2923 flow [2024-06-21 18:13:37,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 213 transitions, 2733 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:37,282 INFO L231 Difference]: Finished difference. Result has 223 places, 182 transitions, 2359 flow [2024-06-21 18:13:37,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2177, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2359, PETRI_PLACES=223, PETRI_TRANSITIONS=182} [2024-06-21 18:13:37,283 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 182 predicate places. [2024-06-21 18:13:37,283 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 182 transitions, 2359 flow [2024-06-21 18:13:37,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:37,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:37,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:37,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 18:13:37,283 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:37,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:37,284 INFO L85 PathProgramCache]: Analyzing trace with hash 731074237, now seen corresponding path program 18 times [2024-06-21 18:13:37,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:37,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222919063] [2024-06-21 18:13:37,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:37,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:37,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:37,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:37,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222919063] [2024-06-21 18:13:37,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222919063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:37,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:37,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:37,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874548230] [2024-06-21 18:13:37,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:37,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:37,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:37,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:37,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:37,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:37,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 182 transitions, 2359 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:37,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:37,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:37,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:37,668 INFO L124 PetriNetUnfolderBase]: 1151/2380 cut-off events. [2024-06-21 18:13:37,668 INFO L125 PetriNetUnfolderBase]: For 18251/18265 co-relation queries the response was YES. [2024-06-21 18:13:37,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9198 conditions, 2380 events. 1151/2380 cut-off events. For 18251/18265 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 18278 event pairs, 201 based on Foata normal form. 18/2332 useless extension candidates. Maximal degree in co-relation 9110. Up to 1219 conditions per place. [2024-06-21 18:13:37,686 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 113 selfloop transitions, 84 changer transitions 0/207 dead transitions. [2024-06-21 18:13:37,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 207 transitions, 2809 flow [2024-06-21 18:13:37,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:37,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-21 18:13:37,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-21 18:13:37,687 INFO L175 Difference]: Start difference. First operand has 223 places, 182 transitions, 2359 flow. Second operand 9 states and 220 transitions. [2024-06-21 18:13:37,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 207 transitions, 2809 flow [2024-06-21 18:13:37,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 207 transitions, 2587 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 18:13:37,739 INFO L231 Difference]: Finished difference. Result has 222 places, 182 transitions, 2309 flow [2024-06-21 18:13:37,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2309, PETRI_PLACES=222, PETRI_TRANSITIONS=182} [2024-06-21 18:13:37,739 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-21 18:13:37,740 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 182 transitions, 2309 flow [2024-06-21 18:13:37,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:37,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:37,740 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] [2024-06-21 18:13:37,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 18:13:37,740 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:37,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:37,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1466478211, now seen corresponding path program 1 times [2024-06-21 18:13:37,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:37,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146182888] [2024-06-21 18:13:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:37,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:37,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:37,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146182888] [2024-06-21 18:13:37,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146182888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:37,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:37,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:37,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602497996] [2024-06-21 18:13:37,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:37,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:37,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:37,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:37,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:37,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:37,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 182 transitions, 2309 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:37,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:37,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:37,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:38,134 INFO L124 PetriNetUnfolderBase]: 1296/2716 cut-off events. [2024-06-21 18:13:38,134 INFO L125 PetriNetUnfolderBase]: For 26109/26113 co-relation queries the response was YES. [2024-06-21 18:13:38,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10383 conditions, 2716 events. 1296/2716 cut-off events. For 26109/26113 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 21523 event pairs, 149 based on Foata normal form. 9/2675 useless extension candidates. Maximal degree in co-relation 10294. Up to 1358 conditions per place. [2024-06-21 18:13:38,152 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 144 selfloop transitions, 65 changer transitions 5/224 dead transitions. [2024-06-21 18:13:38,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 224 transitions, 3034 flow [2024-06-21 18:13:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 18:13:38,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-06-21 18:13:38,153 INFO L175 Difference]: Start difference. First operand has 222 places, 182 transitions, 2309 flow. Second operand 8 states and 206 transitions. [2024-06-21 18:13:38,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 224 transitions, 3034 flow [2024-06-21 18:13:38,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 224 transitions, 2842 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:38,229 INFO L231 Difference]: Finished difference. Result has 224 places, 190 transitions, 2410 flow [2024-06-21 18:13:38,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2139, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2410, PETRI_PLACES=224, PETRI_TRANSITIONS=190} [2024-06-21 18:13:38,230 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-21 18:13:38,230 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 190 transitions, 2410 flow [2024-06-21 18:13:38,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:38,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:38,230 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] [2024-06-21 18:13:38,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 18:13:38,231 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:38,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:38,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1963549943, now seen corresponding path program 2 times [2024-06-21 18:13:38,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:38,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841079135] [2024-06-21 18:13:38,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:38,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:38,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:38,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841079135] [2024-06-21 18:13:38,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841079135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:38,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:38,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:38,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096886431] [2024-06-21 18:13:38,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:38,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:38,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:38,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:38,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:38,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:38,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 190 transitions, 2410 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:38,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:38,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:38,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:38,688 INFO L124 PetriNetUnfolderBase]: 1278/2658 cut-off events. [2024-06-21 18:13:38,688 INFO L125 PetriNetUnfolderBase]: For 32287/32291 co-relation queries the response was YES. [2024-06-21 18:13:38,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10599 conditions, 2658 events. 1278/2658 cut-off events. For 32287/32291 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 20846 event pairs, 244 based on Foata normal form. 9/2589 useless extension candidates. Maximal degree in co-relation 10507. Up to 1642 conditions per place. [2024-06-21 18:13:38,704 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 152 selfloop transitions, 52 changer transitions 3/217 dead transitions. [2024-06-21 18:13:38,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 217 transitions, 2975 flow [2024-06-21 18:13:38,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:38,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:38,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 18:13:38,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-21 18:13:38,705 INFO L175 Difference]: Start difference. First operand has 224 places, 190 transitions, 2410 flow. Second operand 8 states and 204 transitions. [2024-06-21 18:13:38,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 217 transitions, 2975 flow [2024-06-21 18:13:38,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 217 transitions, 2862 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:38,801 INFO L231 Difference]: Finished difference. Result has 227 places, 189 transitions, 2415 flow [2024-06-21 18:13:38,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2415, PETRI_PLACES=227, PETRI_TRANSITIONS=189} [2024-06-21 18:13:38,801 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-21 18:13:38,801 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 189 transitions, 2415 flow [2024-06-21 18:13:38,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:38,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:38,802 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] [2024-06-21 18:13:38,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 18:13:38,802 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:38,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:38,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1963544363, now seen corresponding path program 3 times [2024-06-21 18:13:38,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:38,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559737595] [2024-06-21 18:13:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:38,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:38,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:38,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:38,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559737595] [2024-06-21 18:13:38,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559737595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:38,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:38,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:38,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067112011] [2024-06-21 18:13:38,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:38,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:38,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:38,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:38,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:38,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:38,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 189 transitions, 2415 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:38,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:38,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:38,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:39,237 INFO L124 PetriNetUnfolderBase]: 1234/2538 cut-off events. [2024-06-21 18:13:39,238 INFO L125 PetriNetUnfolderBase]: For 26445/26449 co-relation queries the response was YES. [2024-06-21 18:13:39,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10032 conditions, 2538 events. 1234/2538 cut-off events. For 26445/26449 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 19508 event pairs, 274 based on Foata normal form. 9/2471 useless extension candidates. Maximal degree in co-relation 9938. Up to 1642 conditions per place. [2024-06-21 18:13:39,255 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 149 selfloop transitions, 51 changer transitions 7/217 dead transitions. [2024-06-21 18:13:39,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 217 transitions, 2889 flow [2024-06-21 18:13:39,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:39,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-21 18:13:39,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 18:13:39,256 INFO L175 Difference]: Start difference. First operand has 227 places, 189 transitions, 2415 flow. Second operand 10 states and 245 transitions. [2024-06-21 18:13:39,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 217 transitions, 2889 flow [2024-06-21 18:13:39,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 217 transitions, 2770 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:39,330 INFO L231 Difference]: Finished difference. Result has 229 places, 185 transitions, 2346 flow [2024-06-21 18:13:39,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2296, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2346, PETRI_PLACES=229, PETRI_TRANSITIONS=185} [2024-06-21 18:13:39,331 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-21 18:13:39,331 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 185 transitions, 2346 flow [2024-06-21 18:13:39,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:39,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:39,331 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] [2024-06-21 18:13:39,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 18:13:39,331 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:39,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:39,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1634357547, now seen corresponding path program 4 times [2024-06-21 18:13:39,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:39,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941960623] [2024-06-21 18:13:39,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:39,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:39,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:39,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941960623] [2024-06-21 18:13:39,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941960623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:39,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:39,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:39,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235333243] [2024-06-21 18:13:39,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:39,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:39,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:39,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:39,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:39,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:39,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 185 transitions, 2346 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:39,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:39,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:39,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:39,802 INFO L124 PetriNetUnfolderBase]: 1201/2519 cut-off events. [2024-06-21 18:13:39,802 INFO L125 PetriNetUnfolderBase]: For 25511/25514 co-relation queries the response was YES. [2024-06-21 18:13:39,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9743 conditions, 2519 events. 1201/2519 cut-off events. For 25511/25514 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 19758 event pairs, 127 based on Foata normal form. 9/2488 useless extension candidates. Maximal degree in co-relation 9650. Up to 1406 conditions per place. [2024-06-21 18:13:39,820 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 140 selfloop transitions, 59 changer transitions 3/212 dead transitions. [2024-06-21 18:13:39,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 212 transitions, 2898 flow [2024-06-21 18:13:39,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:39,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:39,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 18:13:39,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-21 18:13:39,821 INFO L175 Difference]: Start difference. First operand has 229 places, 185 transitions, 2346 flow. Second operand 7 states and 184 transitions. [2024-06-21 18:13:39,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 212 transitions, 2898 flow [2024-06-21 18:13:39,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 212 transitions, 2762 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 18:13:39,901 INFO L231 Difference]: Finished difference. Result has 226 places, 184 transitions, 2366 flow [2024-06-21 18:13:39,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2214, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2366, PETRI_PLACES=226, PETRI_TRANSITIONS=184} [2024-06-21 18:13:39,901 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 185 predicate places. [2024-06-21 18:13:39,901 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 184 transitions, 2366 flow [2024-06-21 18:13:39,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:39,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:39,902 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] [2024-06-21 18:13:39,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 18:13:39,902 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:39,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:39,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1641714777, now seen corresponding path program 5 times [2024-06-21 18:13:39,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:39,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873316997] [2024-06-21 18:13:39,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:39,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:39,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:39,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873316997] [2024-06-21 18:13:39,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873316997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:39,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:39,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:39,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425250658] [2024-06-21 18:13:39,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:39,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:39,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:39,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:39,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:40,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:40,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 184 transitions, 2366 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:40,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:40,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:40,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:40,370 INFO L124 PetriNetUnfolderBase]: 1185/2433 cut-off events. [2024-06-21 18:13:40,370 INFO L125 PetriNetUnfolderBase]: For 25642/25645 co-relation queries the response was YES. [2024-06-21 18:13:40,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9740 conditions, 2433 events. 1185/2433 cut-off events. For 25642/25645 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 18314 event pairs, 250 based on Foata normal form. 9/2404 useless extension candidates. Maximal degree in co-relation 9647. Up to 1406 conditions per place. [2024-06-21 18:13:40,387 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 139 selfloop transitions, 61 changer transitions 7/217 dead transitions. [2024-06-21 18:13:40,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 217 transitions, 2928 flow [2024-06-21 18:13:40,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:40,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:40,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-21 18:13:40,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 18:13:40,390 INFO L175 Difference]: Start difference. First operand has 226 places, 184 transitions, 2366 flow. Second operand 10 states and 250 transitions. [2024-06-21 18:13:40,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 217 transitions, 2928 flow [2024-06-21 18:13:40,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 217 transitions, 2735 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:40,460 INFO L231 Difference]: Finished difference. Result has 228 places, 180 transitions, 2263 flow [2024-06-21 18:13:40,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2175, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2263, PETRI_PLACES=228, PETRI_TRANSITIONS=180} [2024-06-21 18:13:40,461 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 187 predicate places. [2024-06-21 18:13:40,461 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 180 transitions, 2263 flow [2024-06-21 18:13:40,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:40,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:40,461 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] [2024-06-21 18:13:40,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 18:13:40,462 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:40,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:40,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1634363127, now seen corresponding path program 6 times [2024-06-21 18:13:40,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:40,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608063328] [2024-06-21 18:13:40,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:40,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:40,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:40,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:40,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608063328] [2024-06-21 18:13:40,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608063328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:40,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:40,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:40,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749364464] [2024-06-21 18:13:40,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:40,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:40,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:40,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:40,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:40,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:40,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 180 transitions, 2263 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:40,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:40,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:40,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:40,898 INFO L124 PetriNetUnfolderBase]: 1125/2333 cut-off events. [2024-06-21 18:13:40,898 INFO L125 PetriNetUnfolderBase]: For 19611/19614 co-relation queries the response was YES. [2024-06-21 18:13:40,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8938 conditions, 2333 events. 1125/2333 cut-off events. For 19611/19614 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 17553 event pairs, 230 based on Foata normal form. 9/2306 useless extension candidates. Maximal degree in co-relation 8846. Up to 1406 conditions per place. [2024-06-21 18:13:40,916 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 131 selfloop transitions, 58 changer transitions 10/209 dead transitions. [2024-06-21 18:13:40,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 209 transitions, 2725 flow [2024-06-21 18:13:40,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:40,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:40,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-21 18:13:40,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 18:13:40,917 INFO L175 Difference]: Start difference. First operand has 228 places, 180 transitions, 2263 flow. Second operand 9 states and 225 transitions. [2024-06-21 18:13:40,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 209 transitions, 2725 flow [2024-06-21 18:13:40,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 209 transitions, 2615 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 18:13:40,979 INFO L231 Difference]: Finished difference. Result has 226 places, 174 transitions, 2214 flow [2024-06-21 18:13:40,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2214, PETRI_PLACES=226, PETRI_TRANSITIONS=174} [2024-06-21 18:13:40,979 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 185 predicate places. [2024-06-21 18:13:40,979 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 174 transitions, 2214 flow [2024-06-21 18:13:40,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:40,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:40,980 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] [2024-06-21 18:13:40,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 18:13:40,980 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:40,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:40,981 INFO L85 PathProgramCache]: Analyzing trace with hash -540346431, now seen corresponding path program 7 times [2024-06-21 18:13:40,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:40,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114498388] [2024-06-21 18:13:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:40,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:41,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:41,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114498388] [2024-06-21 18:13:41,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114498388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:41,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:41,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:41,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573884524] [2024-06-21 18:13:41,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:41,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:41,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:41,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:41,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:41,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:41,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 174 transitions, 2214 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:41,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:41,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:41,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:41,398 INFO L124 PetriNetUnfolderBase]: 1141/2395 cut-off events. [2024-06-21 18:13:41,398 INFO L125 PetriNetUnfolderBase]: For 30832/30832 co-relation queries the response was YES. [2024-06-21 18:13:41,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9511 conditions, 2395 events. 1141/2395 cut-off events. For 30832/30832 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18516 event pairs, 103 based on Foata normal form. 8/2369 useless extension candidates. Maximal degree in co-relation 9420. Up to 497 conditions per place. [2024-06-21 18:13:41,415 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 95 selfloop transitions, 94 changer transitions 15/214 dead transitions. [2024-06-21 18:13:41,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 214 transitions, 2860 flow [2024-06-21 18:13:41,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:13:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:13:41,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 284 transitions. [2024-06-21 18:13:41,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-21 18:13:41,416 INFO L175 Difference]: Start difference. First operand has 226 places, 174 transitions, 2214 flow. Second operand 12 states and 284 transitions. [2024-06-21 18:13:41,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 214 transitions, 2860 flow [2024-06-21 18:13:41,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 214 transitions, 2560 flow, removed 6 selfloop flow, removed 18 redundant places. [2024-06-21 18:13:41,491 INFO L231 Difference]: Finished difference. Result has 220 places, 169 transitions, 2065 flow [2024-06-21 18:13:41,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1922, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2065, PETRI_PLACES=220, PETRI_TRANSITIONS=169} [2024-06-21 18:13:41,492 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-21 18:13:41,492 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 169 transitions, 2065 flow [2024-06-21 18:13:41,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:41,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:41,492 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] [2024-06-21 18:13:41,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 18:13:41,492 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:41,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:41,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1094062317, now seen corresponding path program 8 times [2024-06-21 18:13:41,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:41,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110618177] [2024-06-21 18:13:41,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:41,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:41,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:41,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110618177] [2024-06-21 18:13:41,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110618177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:41,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:41,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:41,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313718653] [2024-06-21 18:13:41,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:41,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:41,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:41,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:41,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:41,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:41,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 169 transitions, 2065 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:41,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:41,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:41,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:41,900 INFO L124 PetriNetUnfolderBase]: 1075/2303 cut-off events. [2024-06-21 18:13:41,901 INFO L125 PetriNetUnfolderBase]: For 28795/28795 co-relation queries the response was YES. [2024-06-21 18:13:41,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8875 conditions, 2303 events. 1075/2303 cut-off events. For 28795/28795 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 18068 event pairs, 92 based on Foata normal form. 8/2269 useless extension candidates. Maximal degree in co-relation 8791. Up to 497 conditions per place. [2024-06-21 18:13:41,915 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 100 selfloop transitions, 86 changer transitions 13/209 dead transitions. [2024-06-21 18:13:41,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 209 transitions, 2697 flow [2024-06-21 18:13:41,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:13:41,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:13:41,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 282 transitions. [2024-06-21 18:13:41,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 18:13:41,916 INFO L175 Difference]: Start difference. First operand has 220 places, 169 transitions, 2065 flow. Second operand 12 states and 282 transitions. [2024-06-21 18:13:41,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 209 transitions, 2697 flow [2024-06-21 18:13:41,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 209 transitions, 2499 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 18:13:41,985 INFO L231 Difference]: Finished difference. Result has 216 places, 166 transitions, 2028 flow [2024-06-21 18:13:41,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1875, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2028, PETRI_PLACES=216, PETRI_TRANSITIONS=166} [2024-06-21 18:13:41,986 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-21 18:13:41,986 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 166 transitions, 2028 flow [2024-06-21 18:13:41,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:41,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:41,986 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] [2024-06-21 18:13:41,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 18:13:41,986 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:41,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:41,986 INFO L85 PathProgramCache]: Analyzing trace with hash -531092001, now seen corresponding path program 9 times [2024-06-21 18:13:41,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:41,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105403936] [2024-06-21 18:13:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:41,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:42,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:42,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105403936] [2024-06-21 18:13:42,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105403936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:42,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:42,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:42,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230290179] [2024-06-21 18:13:42,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:42,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:42,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:42,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:42,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:42,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:42,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 166 transitions, 2028 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:42,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:42,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:42,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:42,378 INFO L124 PetriNetUnfolderBase]: 1057/2269 cut-off events. [2024-06-21 18:13:42,378 INFO L125 PetriNetUnfolderBase]: For 32457/32457 co-relation queries the response was YES. [2024-06-21 18:13:42,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9088 conditions, 2269 events. 1057/2269 cut-off events. For 32457/32457 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 17845 event pairs, 82 based on Foata normal form. 8/2229 useless extension candidates. Maximal degree in co-relation 9006. Up to 536 conditions per place. [2024-06-21 18:13:42,392 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 109 selfloop transitions, 76 changer transitions 10/205 dead transitions. [2024-06-21 18:13:42,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 205 transitions, 2644 flow [2024-06-21 18:13:42,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 18:13:42,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 18:13:42,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 303 transitions. [2024-06-21 18:13:42,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826923076923077 [2024-06-21 18:13:42,395 INFO L175 Difference]: Start difference. First operand has 216 places, 166 transitions, 2028 flow. Second operand 13 states and 303 transitions. [2024-06-21 18:13:42,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 205 transitions, 2644 flow [2024-06-21 18:13:42,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 205 transitions, 2469 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 18:13:42,471 INFO L231 Difference]: Finished difference. Result has 215 places, 163 transitions, 1994 flow [2024-06-21 18:13:42,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1861, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1994, PETRI_PLACES=215, PETRI_TRANSITIONS=163} [2024-06-21 18:13:42,471 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 174 predicate places. [2024-06-21 18:13:42,471 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 163 transitions, 1994 flow [2024-06-21 18:13:42,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:42,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:42,471 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] [2024-06-21 18:13:42,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 18:13:42,472 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:42,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:42,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1380384207, now seen corresponding path program 10 times [2024-06-21 18:13:42,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:42,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768194791] [2024-06-21 18:13:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:42,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:42,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:42,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768194791] [2024-06-21 18:13:42,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768194791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:42,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:42,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:42,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122002319] [2024-06-21 18:13:42,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:42,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:42,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:42,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:42,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:42,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:42,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 163 transitions, 1994 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:42,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:42,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:42,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:42,846 INFO L124 PetriNetUnfolderBase]: 1009/2173 cut-off events. [2024-06-21 18:13:42,847 INFO L125 PetriNetUnfolderBase]: For 25496/25496 co-relation queries the response was YES. [2024-06-21 18:13:42,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8540 conditions, 2173 events. 1009/2173 cut-off events. For 25496/25496 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 16849 event pairs, 112 based on Foata normal form. 8/2137 useless extension candidates. Maximal degree in co-relation 8459. Up to 536 conditions per place. [2024-06-21 18:13:42,860 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 103 selfloop transitions, 67 changer transitions 14/194 dead transitions. [2024-06-21 18:13:42,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 194 transitions, 2498 flow [2024-06-21 18:13:42,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:13:42,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:13:42,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-21 18:13:42,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5886363636363636 [2024-06-21 18:13:42,861 INFO L175 Difference]: Start difference. First operand has 215 places, 163 transitions, 1994 flow. Second operand 11 states and 259 transitions. [2024-06-21 18:13:42,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 194 transitions, 2498 flow [2024-06-21 18:13:42,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 194 transitions, 2340 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 18:13:42,914 INFO L231 Difference]: Finished difference. Result has 212 places, 153 transitions, 1858 flow [2024-06-21 18:13:42,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1840, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1858, PETRI_PLACES=212, PETRI_TRANSITIONS=153} [2024-06-21 18:13:42,915 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-21 18:13:42,915 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 153 transitions, 1858 flow [2024-06-21 18:13:42,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:42,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:42,915 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] [2024-06-21 18:13:42,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 18:13:42,915 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:42,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:42,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1097781387, now seen corresponding path program 11 times [2024-06-21 18:13:42,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:42,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488172993] [2024-06-21 18:13:42,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:42,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:43,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:43,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488172993] [2024-06-21 18:13:43,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488172993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:43,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:43,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:43,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18427396] [2024-06-21 18:13:43,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:43,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:43,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:43,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:43,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:43,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:43,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 153 transitions, 1858 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:43,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:43,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:43,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:43,343 INFO L124 PetriNetUnfolderBase]: 973/2049 cut-off events. [2024-06-21 18:13:43,343 INFO L125 PetriNetUnfolderBase]: For 28854/28854 co-relation queries the response was YES. [2024-06-21 18:13:43,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8314 conditions, 2049 events. 973/2049 cut-off events. For 28854/28854 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 15658 event pairs, 248 based on Foata normal form. 8/1987 useless extension candidates. Maximal degree in co-relation 8234. Up to 1214 conditions per place. [2024-06-21 18:13:43,355 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 114 selfloop transitions, 57 changer transitions 6/187 dead transitions. [2024-06-21 18:13:43,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 187 transitions, 2354 flow [2024-06-21 18:13:43,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:13:43,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:13:43,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 280 transitions. [2024-06-21 18:13:43,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 18:13:43,356 INFO L175 Difference]: Start difference. First operand has 212 places, 153 transitions, 1858 flow. Second operand 12 states and 280 transitions. [2024-06-21 18:13:43,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 187 transitions, 2354 flow [2024-06-21 18:13:43,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 187 transitions, 2188 flow, removed 2 selfloop flow, removed 18 redundant places. [2024-06-21 18:13:43,416 INFO L231 Difference]: Finished difference. Result has 204 places, 151 transitions, 1796 flow [2024-06-21 18:13:43,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1694, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1796, PETRI_PLACES=204, PETRI_TRANSITIONS=151} [2024-06-21 18:13:43,416 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-21 18:13:43,416 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 151 transitions, 1796 flow [2024-06-21 18:13:43,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:43,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:43,417 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] [2024-06-21 18:13:43,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 18:13:43,417 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:43,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:43,418 INFO L85 PathProgramCache]: Analyzing trace with hash -702855561, now seen corresponding path program 12 times [2024-06-21 18:13:43,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:43,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272651157] [2024-06-21 18:13:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:43,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:43,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:43,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272651157] [2024-06-21 18:13:43,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272651157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:43,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:43,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:43,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619827707] [2024-06-21 18:13:43,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:43,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:43,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:43,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:43,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:43,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:43,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 151 transitions, 1796 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:43,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:43,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:43,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:43,845 INFO L124 PetriNetUnfolderBase]: 929/1985 cut-off events. [2024-06-21 18:13:43,845 INFO L125 PetriNetUnfolderBase]: For 23894/23894 co-relation queries the response was YES. [2024-06-21 18:13:43,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7678 conditions, 1985 events. 929/1985 cut-off events. For 23894/23894 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 15318 event pairs, 158 based on Foata normal form. 8/1918 useless extension candidates. Maximal degree in co-relation 7602. Up to 1214 conditions per place. [2024-06-21 18:13:43,857 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 101 selfloop transitions, 52 changer transitions 17/180 dead transitions. [2024-06-21 18:13:43,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 180 transitions, 2200 flow [2024-06-21 18:13:43,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:13:43,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:13:43,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-21 18:13:43,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2024-06-21 18:13:43,857 INFO L175 Difference]: Start difference. First operand has 204 places, 151 transitions, 1796 flow. Second operand 11 states and 256 transitions. [2024-06-21 18:13:43,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 180 transitions, 2200 flow [2024-06-21 18:13:43,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 180 transitions, 2085 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 18:13:43,908 INFO L231 Difference]: Finished difference. Result has 203 places, 146 transitions, 1734 flow [2024-06-21 18:13:43,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1734, PETRI_PLACES=203, PETRI_TRANSITIONS=146} [2024-06-21 18:13:43,909 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-21 18:13:43,909 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 146 transitions, 1734 flow [2024-06-21 18:13:43,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:43,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:43,909 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] [2024-06-21 18:13:43,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 18:13:43,909 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:43,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:43,910 INFO L85 PathProgramCache]: Analyzing trace with hash -415968231, now seen corresponding path program 13 times [2024-06-21 18:13:43,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:43,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846535159] [2024-06-21 18:13:43,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:43,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:43,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:43,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846535159] [2024-06-21 18:13:43,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846535159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:43,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:43,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:43,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759731575] [2024-06-21 18:13:43,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:43,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:43,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:43,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:43,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:44,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:44,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 146 transitions, 1734 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:44,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:44,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:44,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:44,308 INFO L124 PetriNetUnfolderBase]: 1020/2180 cut-off events. [2024-06-21 18:13:44,308 INFO L125 PetriNetUnfolderBase]: For 42566/42566 co-relation queries the response was YES. [2024-06-21 18:13:44,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9017 conditions, 2180 events. 1020/2180 cut-off events. For 42566/42566 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 17247 event pairs, 220 based on Foata normal form. 8/2114 useless extension candidates. Maximal degree in co-relation 8941. Up to 1020 conditions per place. [2024-06-21 18:13:44,321 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 111 selfloop transitions, 59 changer transitions 9/189 dead transitions. [2024-06-21 18:13:44,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 189 transitions, 2323 flow [2024-06-21 18:13:44,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 18:13:44,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 18:13:44,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 346 transitions. [2024-06-21 18:13:44,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5766666666666667 [2024-06-21 18:13:44,323 INFO L175 Difference]: Start difference. First operand has 203 places, 146 transitions, 1734 flow. Second operand 15 states and 346 transitions. [2024-06-21 18:13:44,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 189 transitions, 2323 flow [2024-06-21 18:13:44,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 189 transitions, 2193 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 18:13:44,381 INFO L231 Difference]: Finished difference. Result has 202 places, 145 transitions, 1734 flow [2024-06-21 18:13:44,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1608, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1734, PETRI_PLACES=202, PETRI_TRANSITIONS=145} [2024-06-21 18:13:44,382 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-21 18:13:44,382 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 145 transitions, 1734 flow [2024-06-21 18:13:44,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:44,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:44,383 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] [2024-06-21 18:13:44,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 18:13:44,383 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:44,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:44,383 INFO L85 PathProgramCache]: Analyzing trace with hash -415789671, now seen corresponding path program 14 times [2024-06-21 18:13:44,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:44,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562355332] [2024-06-21 18:13:44,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:44,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:44,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:44,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562355332] [2024-06-21 18:13:44,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562355332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:44,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:44,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:44,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89918911] [2024-06-21 18:13:44,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:44,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:44,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:44,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:44,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:44,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:44,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 145 transitions, 1734 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:44,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:44,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:44,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:44,776 INFO L124 PetriNetUnfolderBase]: 1004/2124 cut-off events. [2024-06-21 18:13:44,776 INFO L125 PetriNetUnfolderBase]: For 42419/42419 co-relation queries the response was YES. [2024-06-21 18:13:44,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8944 conditions, 2124 events. 1004/2124 cut-off events. For 42419/42419 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 16555 event pairs, 268 based on Foata normal form. 8/2059 useless extension candidates. Maximal degree in co-relation 8868. Up to 1020 conditions per place. [2024-06-21 18:13:44,789 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 110 selfloop transitions, 50 changer transitions 8/178 dead transitions. [2024-06-21 18:13:44,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 178 transitions, 2276 flow [2024-06-21 18:13:44,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:13:44,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:13:44,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-06-21 18:13:44,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6045454545454545 [2024-06-21 18:13:44,790 INFO L175 Difference]: Start difference. First operand has 202 places, 145 transitions, 1734 flow. Second operand 11 states and 266 transitions. [2024-06-21 18:13:44,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 178 transitions, 2276 flow [2024-06-21 18:13:44,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 178 transitions, 2164 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 18:13:44,856 INFO L231 Difference]: Finished difference. Result has 199 places, 141 transitions, 1669 flow [2024-06-21 18:13:44,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1626, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1669, PETRI_PLACES=199, PETRI_TRANSITIONS=141} [2024-06-21 18:13:44,857 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 158 predicate places. [2024-06-21 18:13:44,857 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 141 transitions, 1669 flow [2024-06-21 18:13:44,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:44,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:44,857 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] [2024-06-21 18:13:44,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 18:13:44,857 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:44,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:44,857 INFO L85 PathProgramCache]: Analyzing trace with hash -415616691, now seen corresponding path program 15 times [2024-06-21 18:13:44,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:44,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927134123] [2024-06-21 18:13:44,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:44,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:44,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:44,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927134123] [2024-06-21 18:13:44,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927134123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:44,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:44,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:44,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311251604] [2024-06-21 18:13:44,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:44,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:44,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:44,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:44,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:44,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:44,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 141 transitions, 1669 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:44,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:44,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:44,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:45,239 INFO L124 PetriNetUnfolderBase]: 944/2008 cut-off events. [2024-06-21 18:13:45,240 INFO L125 PetriNetUnfolderBase]: For 37723/37723 co-relation queries the response was YES. [2024-06-21 18:13:45,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8300 conditions, 2008 events. 944/2008 cut-off events. For 37723/37723 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 15417 event pairs, 256 based on Foata normal form. 8/1953 useless extension candidates. Maximal degree in co-relation 8224. Up to 1020 conditions per place. [2024-06-21 18:13:45,250 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 111 selfloop transitions, 48 changer transitions 8/177 dead transitions. [2024-06-21 18:13:45,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 177 transitions, 2215 flow [2024-06-21 18:13:45,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:13:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:13:45,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 287 transitions. [2024-06-21 18:13:45,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5979166666666667 [2024-06-21 18:13:45,251 INFO L175 Difference]: Start difference. First operand has 199 places, 141 transitions, 1669 flow. Second operand 12 states and 287 transitions. [2024-06-21 18:13:45,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 177 transitions, 2215 flow [2024-06-21 18:13:45,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 177 transitions, 2091 flow, removed 3 selfloop flow, removed 14 redundant places. [2024-06-21 18:13:45,305 INFO L231 Difference]: Finished difference. Result has 196 places, 137 transitions, 1594 flow [2024-06-21 18:13:45,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1549, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1594, PETRI_PLACES=196, PETRI_TRANSITIONS=137} [2024-06-21 18:13:45,306 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-21 18:13:45,306 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 137 transitions, 1594 flow [2024-06-21 18:13:45,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:45,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:45,307 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] [2024-06-21 18:13:45,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 18:13:45,307 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:45,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:45,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1384841697, now seen corresponding path program 16 times [2024-06-21 18:13:45,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:45,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214728366] [2024-06-21 18:13:45,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:45,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:45,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:45,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214728366] [2024-06-21 18:13:45,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214728366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:45,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:45,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:45,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752529524] [2024-06-21 18:13:45,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:45,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:45,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:45,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:45,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:45,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:45,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 137 transitions, 1594 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:45,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:45,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:45,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:45,661 INFO L124 PetriNetUnfolderBase]: 884/1852 cut-off events. [2024-06-21 18:13:45,661 INFO L125 PetriNetUnfolderBase]: For 32923/32923 co-relation queries the response was YES. [2024-06-21 18:13:45,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7558 conditions, 1852 events. 884/1852 cut-off events. For 32923/32923 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 13737 event pairs, 298 based on Foata normal form. 8/1803 useless extension candidates. Maximal degree in co-relation 7484. Up to 1020 conditions per place. [2024-06-21 18:13:45,672 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 103 selfloop transitions, 43 changer transitions 12/168 dead transitions. [2024-06-21 18:13:45,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 168 transitions, 2044 flow [2024-06-21 18:13:45,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:13:45,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:13:45,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 263 transitions. [2024-06-21 18:13:45,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5977272727272728 [2024-06-21 18:13:45,673 INFO L175 Difference]: Start difference. First operand has 196 places, 137 transitions, 1594 flow. Second operand 11 states and 263 transitions. [2024-06-21 18:13:45,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 168 transitions, 2044 flow [2024-06-21 18:13:45,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 168 transitions, 1948 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 18:13:45,723 INFO L231 Difference]: Finished difference. Result has 194 places, 132 transitions, 1509 flow [2024-06-21 18:13:45,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1509, PETRI_PLACES=194, PETRI_TRANSITIONS=132} [2024-06-21 18:13:45,723 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 153 predicate places. [2024-06-21 18:13:45,723 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 132 transitions, 1509 flow [2024-06-21 18:13:45,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:45,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:45,724 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] [2024-06-21 18:13:45,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 18:13:45,724 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:45,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:45,724 INFO L85 PathProgramCache]: Analyzing trace with hash -415622271, now seen corresponding path program 17 times [2024-06-21 18:13:45,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:45,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883285448] [2024-06-21 18:13:45,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:45,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:45,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:45,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883285448] [2024-06-21 18:13:45,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883285448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:45,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:45,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:45,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182457428] [2024-06-21 18:13:45,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:45,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:45,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:45,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:45,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:45,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:45,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 132 transitions, 1509 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:45,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:45,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:45,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:46,066 INFO L124 PetriNetUnfolderBase]: 832/1764 cut-off events. [2024-06-21 18:13:46,066 INFO L125 PetriNetUnfolderBase]: For 27769/27769 co-relation queries the response was YES. [2024-06-21 18:13:46,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6938 conditions, 1764 events. 832/1764 cut-off events. For 27769/27769 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 13184 event pairs, 194 based on Foata normal form. 8/1716 useless extension candidates. Maximal degree in co-relation 6864. Up to 1020 conditions per place. [2024-06-21 18:13:46,078 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 101 selfloop transitions, 42 changer transitions 12/165 dead transitions. [2024-06-21 18:13:46,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 165 transitions, 1957 flow [2024-06-21 18:13:46,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:13:46,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:13:46,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 282 transitions. [2024-06-21 18:13:46,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 18:13:46,080 INFO L175 Difference]: Start difference. First operand has 194 places, 132 transitions, 1509 flow. Second operand 12 states and 282 transitions. [2024-06-21 18:13:46,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 165 transitions, 1957 flow [2024-06-21 18:13:46,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 165 transitions, 1848 flow, removed 3 selfloop flow, removed 14 redundant places. [2024-06-21 18:13:46,126 INFO L231 Difference]: Finished difference. Result has 190 places, 127 transitions, 1433 flow [2024-06-21 18:13:46,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1433, PETRI_PLACES=190, PETRI_TRANSITIONS=127} [2024-06-21 18:13:46,127 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-21 18:13:46,127 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 127 transitions, 1433 flow [2024-06-21 18:13:46,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:46,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:46,127 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] [2024-06-21 18:13:46,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 18:13:46,127 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:46,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:46,128 INFO L85 PathProgramCache]: Analyzing trace with hash -415973811, now seen corresponding path program 18 times [2024-06-21 18:13:46,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:46,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091683965] [2024-06-21 18:13:46,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:46,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:46,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:46,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091683965] [2024-06-21 18:13:46,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091683965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:46,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:46,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:46,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026355229] [2024-06-21 18:13:46,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:46,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:46,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:46,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:46,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:46,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:46,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 127 transitions, 1433 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:46,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:46,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:46,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:46,463 INFO L124 PetriNetUnfolderBase]: 780/1656 cut-off events. [2024-06-21 18:13:46,463 INFO L125 PetriNetUnfolderBase]: For 22761/22761 co-relation queries the response was YES. [2024-06-21 18:13:46,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6339 conditions, 1656 events. 780/1656 cut-off events. For 22761/22761 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 12196 event pairs, 182 based on Foata normal form. 8/1608 useless extension candidates. Maximal degree in co-relation 6266. Up to 1020 conditions per place. [2024-06-21 18:13:46,472 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 93 selfloop transitions, 36 changer transitions 17/156 dead transitions. [2024-06-21 18:13:46,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 156 transitions, 1787 flow [2024-06-21 18:13:46,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:13:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:13:46,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 277 transitions. [2024-06-21 18:13:46,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5770833333333333 [2024-06-21 18:13:46,473 INFO L175 Difference]: Start difference. First operand has 190 places, 127 transitions, 1433 flow. Second operand 12 states and 277 transitions. [2024-06-21 18:13:46,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 156 transitions, 1787 flow [2024-06-21 18:13:46,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 156 transitions, 1672 flow, removed 1 selfloop flow, removed 15 redundant places. [2024-06-21 18:13:46,515 INFO L231 Difference]: Finished difference. Result has 184 places, 119 transitions, 1291 flow [2024-06-21 18:13:46,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1318, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1291, PETRI_PLACES=184, PETRI_TRANSITIONS=119} [2024-06-21 18:13:46,515 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 143 predicate places. [2024-06-21 18:13:46,515 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 119 transitions, 1291 flow [2024-06-21 18:13:46,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:46,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:46,516 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] [2024-06-21 18:13:46,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 18:13:46,516 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:46,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:46,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1478909481, now seen corresponding path program 19 times [2024-06-21 18:13:46,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:46,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369133008] [2024-06-21 18:13:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:46,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:46,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:46,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369133008] [2024-06-21 18:13:46,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369133008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:46,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:46,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:46,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113755450] [2024-06-21 18:13:46,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:46,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:46,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:46,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:46,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:46,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:46,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 119 transitions, 1291 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:46,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:46,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:46,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:46,837 INFO L124 PetriNetUnfolderBase]: 820/1773 cut-off events. [2024-06-21 18:13:46,837 INFO L125 PetriNetUnfolderBase]: For 32003/32005 co-relation queries the response was YES. [2024-06-21 18:13:46,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6888 conditions, 1773 events. 820/1773 cut-off events. For 32003/32005 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 13502 event pairs, 151 based on Foata normal form. 10/1740 useless extension candidates. Maximal degree in co-relation 6817. Up to 708 conditions per place. [2024-06-21 18:13:46,847 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 90 selfloop transitions, 42 changer transitions 9/151 dead transitions. [2024-06-21 18:13:46,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 151 transitions, 1782 flow [2024-06-21 18:13:46,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:46,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-21 18:13:46,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-21 18:13:46,848 INFO L175 Difference]: Start difference. First operand has 184 places, 119 transitions, 1291 flow. Second operand 9 states and 224 transitions. [2024-06-21 18:13:46,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 151 transitions, 1782 flow [2024-06-21 18:13:46,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 151 transitions, 1668 flow, removed 4 selfloop flow, removed 14 redundant places. [2024-06-21 18:13:46,892 INFO L231 Difference]: Finished difference. Result has 174 places, 118 transitions, 1267 flow [2024-06-21 18:13:46,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1267, PETRI_PLACES=174, PETRI_TRANSITIONS=118} [2024-06-21 18:13:46,892 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-21 18:13:46,892 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 118 transitions, 1267 flow [2024-06-21 18:13:46,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:46,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:46,893 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] [2024-06-21 18:13:46,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 18:13:46,893 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:46,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:46,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1478903901, now seen corresponding path program 20 times [2024-06-21 18:13:46,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:46,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756477860] [2024-06-21 18:13:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:46,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:46,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:46,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756477860] [2024-06-21 18:13:46,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756477860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:46,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:46,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:46,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924816554] [2024-06-21 18:13:46,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:46,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:46,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:46,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:46,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:47,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:47,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 118 transitions, 1267 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:47,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:47,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:47,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:47,220 INFO L124 PetriNetUnfolderBase]: 776/1673 cut-off events. [2024-06-21 18:13:47,220 INFO L125 PetriNetUnfolderBase]: For 27316/27318 co-relation queries the response was YES. [2024-06-21 18:13:47,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6432 conditions, 1673 events. 776/1673 cut-off events. For 27316/27318 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 12495 event pairs, 91 based on Foata normal form. 10/1642 useless extension candidates. Maximal degree in co-relation 6363. Up to 708 conditions per place. [2024-06-21 18:13:47,228 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 86 selfloop transitions, 39 changer transitions 14/149 dead transitions. [2024-06-21 18:13:47,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 149 transitions, 1679 flow [2024-06-21 18:13:47,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:47,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:47,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-21 18:13:47,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025 [2024-06-21 18:13:47,229 INFO L175 Difference]: Start difference. First operand has 174 places, 118 transitions, 1267 flow. Second operand 10 states and 241 transitions. [2024-06-21 18:13:47,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 149 transitions, 1679 flow [2024-06-21 18:13:47,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 149 transitions, 1602 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:47,275 INFO L231 Difference]: Finished difference. Result has 175 places, 114 transitions, 1233 flow [2024-06-21 18:13:47,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1233, PETRI_PLACES=175, PETRI_TRANSITIONS=114} [2024-06-21 18:13:47,275 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-21 18:13:47,275 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 114 transitions, 1233 flow [2024-06-21 18:13:47,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:47,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:47,275 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] [2024-06-21 18:13:47,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 18:13:47,276 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:47,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:47,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1250835351, now seen corresponding path program 21 times [2024-06-21 18:13:47,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:47,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941740604] [2024-06-21 18:13:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:47,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:47,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:47,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941740604] [2024-06-21 18:13:47,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941740604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:47,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:47,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:47,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429627410] [2024-06-21 18:13:47,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:47,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:47,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:47,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:47,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:47,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:47,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 114 transitions, 1233 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:47,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:47,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:47,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:47,609 INFO L124 PetriNetUnfolderBase]: 810/1745 cut-off events. [2024-06-21 18:13:47,609 INFO L125 PetriNetUnfolderBase]: For 36201/36201 co-relation queries the response was YES. [2024-06-21 18:13:47,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7035 conditions, 1745 events. 810/1745 cut-off events. For 36201/36201 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 13238 event pairs, 199 based on Foata normal form. 8/1710 useless extension candidates. Maximal degree in co-relation 6966. Up to 708 conditions per place. [2024-06-21 18:13:47,618 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 84 selfloop transitions, 40 changer transitions 11/145 dead transitions. [2024-06-21 18:13:47,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 145 transitions, 1707 flow [2024-06-21 18:13:47,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:47,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:47,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-21 18:13:47,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6194444444444445 [2024-06-21 18:13:47,619 INFO L175 Difference]: Start difference. First operand has 175 places, 114 transitions, 1233 flow. Second operand 9 states and 223 transitions. [2024-06-21 18:13:47,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 145 transitions, 1707 flow [2024-06-21 18:13:47,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 145 transitions, 1611 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 18:13:47,653 INFO L231 Difference]: Finished difference. Result has 170 places, 110 transitions, 1182 flow [2024-06-21 18:13:47,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1182, PETRI_PLACES=170, PETRI_TRANSITIONS=110} [2024-06-21 18:13:47,654 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 129 predicate places. [2024-06-21 18:13:47,654 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 110 transitions, 1182 flow [2024-06-21 18:13:47,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:47,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:47,654 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] [2024-06-21 18:13:47,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 18:13:47,654 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:47,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:47,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1250651211, now seen corresponding path program 22 times [2024-06-21 18:13:47,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:47,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043716456] [2024-06-21 18:13:47,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:47,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:47,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:47,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043716456] [2024-06-21 18:13:47,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043716456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:47,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:47,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:47,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195676013] [2024-06-21 18:13:47,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:47,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:47,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:47,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:47,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:47,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:47,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 110 transitions, 1182 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:47,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:47,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:47,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:47,988 INFO L124 PetriNetUnfolderBase]: 750/1617 cut-off events. [2024-06-21 18:13:47,988 INFO L125 PetriNetUnfolderBase]: For 29436/29436 co-relation queries the response was YES. [2024-06-21 18:13:47,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6372 conditions, 1617 events. 750/1617 cut-off events. For 29436/29436 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 12066 event pairs, 189 based on Foata normal form. 8/1584 useless extension candidates. Maximal degree in co-relation 6305. Up to 708 conditions per place. [2024-06-21 18:13:47,996 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 85 selfloop transitions, 43 changer transitions 9/147 dead transitions. [2024-06-21 18:13:47,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 147 transitions, 1668 flow [2024-06-21 18:13:47,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:13:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:13:47,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 283 transitions. [2024-06-21 18:13:47,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5895833333333333 [2024-06-21 18:13:47,997 INFO L175 Difference]: Start difference. First operand has 170 places, 110 transitions, 1182 flow. Second operand 12 states and 283 transitions. [2024-06-21 18:13:47,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 147 transitions, 1668 flow [2024-06-21 18:13:48,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 147 transitions, 1548 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 18:13:48,027 INFO L231 Difference]: Finished difference. Result has 169 places, 108 transitions, 1139 flow [2024-06-21 18:13:48,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1139, PETRI_PLACES=169, PETRI_TRANSITIONS=108} [2024-06-21 18:13:48,028 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-21 18:13:48,028 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 108 transitions, 1139 flow [2024-06-21 18:13:48,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:48,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:48,028 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] [2024-06-21 18:13:48,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 18:13:48,029 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:48,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:48,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1250824191, now seen corresponding path program 23 times [2024-06-21 18:13:48,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:48,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138490656] [2024-06-21 18:13:48,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:48,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:48,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:48,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138490656] [2024-06-21 18:13:48,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138490656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:48,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:48,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:48,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498437584] [2024-06-21 18:13:48,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:48,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:48,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:48,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:48,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:48,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:48,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 108 transitions, 1139 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:48,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:48,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:48,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:48,324 INFO L124 PetriNetUnfolderBase]: 706/1525 cut-off events. [2024-06-21 18:13:48,324 INFO L125 PetriNetUnfolderBase]: For 24685/24685 co-relation queries the response was YES. [2024-06-21 18:13:48,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5798 conditions, 1525 events. 706/1525 cut-off events. For 24685/24685 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 11184 event pairs, 173 based on Foata normal form. 8/1498 useless extension candidates. Maximal degree in co-relation 5733. Up to 708 conditions per place. [2024-06-21 18:13:48,332 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 82 selfloop transitions, 35 changer transitions 12/139 dead transitions. [2024-06-21 18:13:48,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 139 transitions, 1597 flow [2024-06-21 18:13:48,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:48,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:48,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-21 18:13:48,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-21 18:13:48,333 INFO L175 Difference]: Start difference. First operand has 169 places, 108 transitions, 1139 flow. Second operand 9 states and 222 transitions. [2024-06-21 18:13:48,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 139 transitions, 1597 flow [2024-06-21 18:13:48,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 139 transitions, 1502 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 18:13:48,369 INFO L231 Difference]: Finished difference. Result has 165 places, 103 transitions, 1051 flow [2024-06-21 18:13:48,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1051, PETRI_PLACES=165, PETRI_TRANSITIONS=103} [2024-06-21 18:13:48,370 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-21 18:13:48,370 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 103 transitions, 1051 flow [2024-06-21 18:13:48,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:48,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:48,370 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] [2024-06-21 18:13:48,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 18:13:48,370 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:48,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:48,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1251002751, now seen corresponding path program 24 times [2024-06-21 18:13:48,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:48,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986235348] [2024-06-21 18:13:48,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:48,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:48,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:48,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986235348] [2024-06-21 18:13:48,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986235348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:48,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:48,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:48,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548683248] [2024-06-21 18:13:48,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:48,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:48,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:48,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:48,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:48,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:48,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 103 transitions, 1051 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:48,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:48,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:48,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:48,674 INFO L124 PetriNetUnfolderBase]: 682/1461 cut-off events. [2024-06-21 18:13:48,674 INFO L125 PetriNetUnfolderBase]: For 23377/23377 co-relation queries the response was YES. [2024-06-21 18:13:48,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5567 conditions, 1461 events. 682/1461 cut-off events. For 23377/23377 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 10595 event pairs, 85 based on Foata normal form. 8/1440 useless extension candidates. Maximal degree in co-relation 5503. Up to 708 conditions per place. [2024-06-21 18:13:48,682 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 83 selfloop transitions, 36 changer transitions 13/142 dead transitions. [2024-06-21 18:13:48,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 142 transitions, 1527 flow [2024-06-21 18:13:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:13:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:13:48,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 284 transitions. [2024-06-21 18:13:48,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-21 18:13:48,683 INFO L175 Difference]: Start difference. First operand has 165 places, 103 transitions, 1051 flow. Second operand 12 states and 284 transitions. [2024-06-21 18:13:48,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 142 transitions, 1527 flow [2024-06-21 18:13:48,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 142 transitions, 1419 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 18:13:48,716 INFO L231 Difference]: Finished difference. Result has 165 places, 100 transitions, 990 flow [2024-06-21 18:13:48,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=947, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=990, PETRI_PLACES=165, PETRI_TRANSITIONS=100} [2024-06-21 18:13:48,717 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-21 18:13:48,717 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 100 transitions, 990 flow [2024-06-21 18:13:48,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:48,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:48,717 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] [2024-06-21 18:13:48,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 18:13:48,717 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:48,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:48,717 INFO L85 PathProgramCache]: Analyzing trace with hash -2143498727, now seen corresponding path program 25 times [2024-06-21 18:13:48,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:48,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492202640] [2024-06-21 18:13:48,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:48,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:48,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:48,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492202640] [2024-06-21 18:13:48,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492202640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:48,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:48,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:48,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673675984] [2024-06-21 18:13:48,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:48,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:48,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:48,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:48,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:48,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:48,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 100 transitions, 990 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:48,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:48,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:48,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:49,052 INFO L124 PetriNetUnfolderBase]: 634/1357 cut-off events. [2024-06-21 18:13:49,052 INFO L125 PetriNetUnfolderBase]: For 18693/18693 co-relation queries the response was YES. [2024-06-21 18:13:49,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5013 conditions, 1357 events. 634/1357 cut-off events. For 18693/18693 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 9557 event pairs, 169 based on Foata normal form. 8/1336 useless extension candidates. Maximal degree in co-relation 4950. Up to 708 conditions per place. [2024-06-21 18:13:49,058 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 74 selfloop transitions, 32 changer transitions 16/132 dead transitions. [2024-06-21 18:13:49,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 132 transitions, 1368 flow [2024-06-21 18:13:49,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:13:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:13:49,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 257 transitions. [2024-06-21 18:13:49,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5840909090909091 [2024-06-21 18:13:49,058 INFO L175 Difference]: Start difference. First operand has 165 places, 100 transitions, 990 flow. Second operand 11 states and 257 transitions. [2024-06-21 18:13:49,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 132 transitions, 1368 flow [2024-06-21 18:13:49,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 132 transitions, 1290 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 18:13:49,083 INFO L231 Difference]: Finished difference. Result has 163 places, 96 transitions, 940 flow [2024-06-21 18:13:49,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=940, PETRI_PLACES=163, PETRI_TRANSITIONS=96} [2024-06-21 18:13:49,084 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 122 predicate places. [2024-06-21 18:13:49,084 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 96 transitions, 940 flow [2024-06-21 18:13:49,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:49,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:49,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:49,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 18:13:49,084 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:49,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:49,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1251008331, now seen corresponding path program 26 times [2024-06-21 18:13:49,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:49,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192087736] [2024-06-21 18:13:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:49,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:49,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:49,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:49,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192087736] [2024-06-21 18:13:49,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192087736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:49,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:49,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:49,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995368831] [2024-06-21 18:13:49,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:49,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:49,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:49,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:49,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:49,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:49,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 96 transitions, 940 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:49,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:49,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:49,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:49,413 INFO L124 PetriNetUnfolderBase]: 586/1241 cut-off events. [2024-06-21 18:13:49,413 INFO L125 PetriNetUnfolderBase]: For 13835/13835 co-relation queries the response was YES. [2024-06-21 18:13:49,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4478 conditions, 1241 events. 586/1241 cut-off events. For 13835/13835 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 8393 event pairs, 159 based on Foata normal form. 8/1228 useless extension candidates. Maximal degree in co-relation 4416. Up to 708 conditions per place. [2024-06-21 18:13:49,420 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 73 selfloop transitions, 27 changer transitions 16/126 dead transitions. [2024-06-21 18:13:49,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 126 transitions, 1238 flow [2024-06-21 18:13:49,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:13:49,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:13:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-21 18:13:49,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2024-06-21 18:13:49,421 INFO L175 Difference]: Start difference. First operand has 163 places, 96 transitions, 940 flow. Second operand 11 states and 256 transitions. [2024-06-21 18:13:49,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 126 transitions, 1238 flow [2024-06-21 18:13:49,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 126 transitions, 1170 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:49,437 INFO L231 Difference]: Finished difference. Result has 158 places, 87 transitions, 806 flow [2024-06-21 18:13:49,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=806, PETRI_PLACES=158, PETRI_TRANSITIONS=87} [2024-06-21 18:13:49,438 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-21 18:13:49,438 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 87 transitions, 806 flow [2024-06-21 18:13:49,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:49,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:49,438 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] [2024-06-21 18:13:49,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 18:13:49,438 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:49,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:49,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1971917863, now seen corresponding path program 27 times [2024-06-21 18:13:49,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:49,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298730601] [2024-06-21 18:13:49,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:49,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:49,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:49,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298730601] [2024-06-21 18:13:49,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298730601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:49,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:49,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:49,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119996725] [2024-06-21 18:13:49,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:49,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:49,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:49,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:49,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:49,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:49,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 87 transitions, 806 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:49,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:49,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:49,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:49,652 INFO L124 PetriNetUnfolderBase]: 534/1136 cut-off events. [2024-06-21 18:13:49,653 INFO L125 PetriNetUnfolderBase]: For 11935/11935 co-relation queries the response was YES. [2024-06-21 18:13:49,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3937 conditions, 1136 events. 534/1136 cut-off events. For 11935/11935 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7811 event pairs, 132 based on Foata normal form. 8/1093 useless extension candidates. Maximal degree in co-relation 3877. Up to 625 conditions per place. [2024-06-21 18:13:49,658 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 62 selfloop transitions, 19 changer transitions 20/111 dead transitions. [2024-06-21 18:13:49,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 111 transitions, 1060 flow [2024-06-21 18:13:49,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:49,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:49,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 18:13:49,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-21 18:13:49,658 INFO L175 Difference]: Start difference. First operand has 158 places, 87 transitions, 806 flow. Second operand 8 states and 191 transitions. [2024-06-21 18:13:49,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 111 transitions, 1060 flow [2024-06-21 18:13:49,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 111 transitions, 810 flow, removed 1 selfloop flow, removed 31 redundant places. [2024-06-21 18:13:49,682 INFO L231 Difference]: Finished difference. Result has 130 places, 82 transitions, 560 flow [2024-06-21 18:13:49,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=560, PETRI_PLACES=130, PETRI_TRANSITIONS=82} [2024-06-21 18:13:49,682 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-06-21 18:13:49,682 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 82 transitions, 560 flow [2024-06-21 18:13:49,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:49,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:49,683 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] [2024-06-21 18:13:49,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 18:13:49,683 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:49,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:49,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1607590657, now seen corresponding path program 28 times [2024-06-21 18:13:49,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:49,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039461154] [2024-06-21 18:13:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:49,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:49,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:49,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039461154] [2024-06-21 18:13:49,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039461154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:49,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:49,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:49,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44592414] [2024-06-21 18:13:49,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:49,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:49,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:49,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:49,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:49,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:49,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 82 transitions, 560 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:49,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:49,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:49,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:49,958 INFO L124 PetriNetUnfolderBase]: 537/1161 cut-off events. [2024-06-21 18:13:49,958 INFO L125 PetriNetUnfolderBase]: For 17589/17589 co-relation queries the response was YES. [2024-06-21 18:13:49,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3925 conditions, 1161 events. 537/1161 cut-off events. For 17589/17589 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 8317 event pairs, 121 based on Foata normal form. 8/1127 useless extension candidates. Maximal degree in co-relation 3876. Up to 403 conditions per place. [2024-06-21 18:13:49,963 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 70 selfloop transitions, 30 changer transitions 9/119 dead transitions. [2024-06-21 18:13:49,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 119 transitions, 970 flow [2024-06-21 18:13:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 18:13:49,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 18:13:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 298 transitions. [2024-06-21 18:13:49,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573076923076923 [2024-06-21 18:13:49,964 INFO L175 Difference]: Start difference. First operand has 130 places, 82 transitions, 560 flow. Second operand 13 states and 298 transitions. [2024-06-21 18:13:49,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 119 transitions, 970 flow [2024-06-21 18:13:49,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 119 transitions, 912 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:49,982 INFO L231 Difference]: Finished difference. Result has 126 places, 80 transitions, 567 flow [2024-06-21 18:13:49,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=567, PETRI_PLACES=126, PETRI_TRANSITIONS=80} [2024-06-21 18:13:49,982 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-21 18:13:49,982 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 80 transitions, 567 flow [2024-06-21 18:13:49,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:49,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:49,983 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] [2024-06-21 18:13:49,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 18:13:49,983 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:49,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:49,983 INFO L85 PathProgramCache]: Analyzing trace with hash 892922325, now seen corresponding path program 29 times [2024-06-21 18:13:49,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:49,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474261809] [2024-06-21 18:13:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:49,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:50,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:50,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474261809] [2024-06-21 18:13:50,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474261809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:50,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:50,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:50,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391243662] [2024-06-21 18:13:50,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:50,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:50,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:50,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:50,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:50,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:50,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 80 transitions, 567 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:50,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:50,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:50,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:50,229 INFO L124 PetriNetUnfolderBase]: 521/1109 cut-off events. [2024-06-21 18:13:50,229 INFO L125 PetriNetUnfolderBase]: For 14351/14351 co-relation queries the response was YES. [2024-06-21 18:13:50,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3831 conditions, 1109 events. 521/1109 cut-off events. For 14351/14351 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7725 event pairs, 149 based on Foata normal form. 8/1072 useless extension candidates. Maximal degree in co-relation 3785. Up to 403 conditions per place. [2024-06-21 18:13:50,233 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 66 selfloop transitions, 22 changer transitions 10/108 dead transitions. [2024-06-21 18:13:50,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 108 transitions, 925 flow [2024-06-21 18:13:50,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:50,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:50,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-21 18:13:50,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-21 18:13:50,234 INFO L175 Difference]: Start difference. First operand has 126 places, 80 transitions, 567 flow. Second operand 9 states and 217 transitions. [2024-06-21 18:13:50,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 108 transitions, 925 flow [2024-06-21 18:13:50,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 108 transitions, 846 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 18:13:50,247 INFO L231 Difference]: Finished difference. Result has 121 places, 77 transitions, 513 flow [2024-06-21 18:13:50,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=513, PETRI_PLACES=121, PETRI_TRANSITIONS=77} [2024-06-21 18:13:50,248 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 80 predicate places. [2024-06-21 18:13:50,248 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 77 transitions, 513 flow [2024-06-21 18:13:50,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:50,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:50,248 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] [2024-06-21 18:13:50,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 18:13:50,249 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:50,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:50,249 INFO L85 PathProgramCache]: Analyzing trace with hash 941977405, now seen corresponding path program 30 times [2024-06-21 18:13:50,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:50,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101807453] [2024-06-21 18:13:50,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:50,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:50,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:50,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101807453] [2024-06-21 18:13:50,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101807453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:50,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:50,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:50,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52533513] [2024-06-21 18:13:50,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:50,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:50,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:50,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:50,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:50,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:50,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 77 transitions, 513 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:50,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:50,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:50,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:50,522 INFO L124 PetriNetUnfolderBase]: 493/1069 cut-off events. [2024-06-21 18:13:50,522 INFO L125 PetriNetUnfolderBase]: For 14139/14139 co-relation queries the response was YES. [2024-06-21 18:13:50,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3626 conditions, 1069 events. 493/1069 cut-off events. For 14139/14139 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 7553 event pairs, 203 based on Foata normal form. 8/1017 useless extension candidates. Maximal degree in co-relation 3580. Up to 673 conditions per place. [2024-06-21 18:13:50,526 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 71 selfloop transitions, 12 changer transitions 9/102 dead transitions. [2024-06-21 18:13:50,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 102 transitions, 801 flow [2024-06-21 18:13:50,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:13:50,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:13:50,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-21 18:13:50,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-06-21 18:13:50,528 INFO L175 Difference]: Start difference. First operand has 121 places, 77 transitions, 513 flow. Second operand 11 states and 244 transitions. [2024-06-21 18:13:50,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 102 transitions, 801 flow [2024-06-21 18:13:50,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 102 transitions, 751 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:50,542 INFO L231 Difference]: Finished difference. Result has 122 places, 75 transitions, 473 flow [2024-06-21 18:13:50,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=473, PETRI_PLACES=122, PETRI_TRANSITIONS=75} [2024-06-21 18:13:50,543 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-21 18:13:50,543 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 75 transitions, 473 flow [2024-06-21 18:13:50,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:50,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:50,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:50,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 18:13:50,544 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:50,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:50,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1435827097, now seen corresponding path program 31 times [2024-06-21 18:13:50,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:50,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060880208] [2024-06-21 18:13:50,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:50,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:50,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:50,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060880208] [2024-06-21 18:13:50,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060880208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:50,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:50,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:50,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139070463] [2024-06-21 18:13:50,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:50,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:50,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:50,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:50,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:50,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:50,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 75 transitions, 473 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:50,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:50,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:50,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:50,766 INFO L124 PetriNetUnfolderBase]: 449/977 cut-off events. [2024-06-21 18:13:50,767 INFO L125 PetriNetUnfolderBase]: For 11244/11244 co-relation queries the response was YES. [2024-06-21 18:13:50,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3128 conditions, 977 events. 449/977 cut-off events. For 11244/11244 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6736 event pairs, 195 based on Foata normal form. 8/929 useless extension candidates. Maximal degree in co-relation 3082. Up to 673 conditions per place. [2024-06-21 18:13:50,771 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 59 selfloop transitions, 8 changer transitions 15/92 dead transitions. [2024-06-21 18:13:50,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 92 transitions, 673 flow [2024-06-21 18:13:50,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:50,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:50,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-21 18:13:50,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-21 18:13:50,772 INFO L175 Difference]: Start difference. First operand has 122 places, 75 transitions, 473 flow. Second operand 9 states and 200 transitions. [2024-06-21 18:13:50,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 92 transitions, 673 flow [2024-06-21 18:13:50,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 92 transitions, 646 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:50,785 INFO L231 Difference]: Finished difference. Result has 119 places, 71 transitions, 431 flow [2024-06-21 18:13:50,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=431, PETRI_PLACES=119, PETRI_TRANSITIONS=71} [2024-06-21 18:13:50,785 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-21 18:13:50,786 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 71 transitions, 431 flow [2024-06-21 18:13:50,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:50,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:50,786 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] [2024-06-21 18:13:50,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 18:13:50,786 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:50,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:50,787 INFO L85 PathProgramCache]: Analyzing trace with hash 947725735, now seen corresponding path program 32 times [2024-06-21 18:13:50,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:50,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32351756] [2024-06-21 18:13:50,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:50,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:50,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:50,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32351756] [2024-06-21 18:13:50,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32351756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:50,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:50,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:50,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434665328] [2024-06-21 18:13:50,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:50,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:50,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:50,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:50,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:50,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:50,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 71 transitions, 431 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:50,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:50,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:50,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:51,038 INFO L124 PetriNetUnfolderBase]: 427/927 cut-off events. [2024-06-21 18:13:51,038 INFO L125 PetriNetUnfolderBase]: For 11208/11208 co-relation queries the response was YES. [2024-06-21 18:13:51,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2945 conditions, 927 events. 427/927 cut-off events. For 11208/11208 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6289 event pairs, 137 based on Foata normal form. 8/893 useless extension candidates. Maximal degree in co-relation 2900. Up to 403 conditions per place. [2024-06-21 18:13:51,043 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 56 selfloop transitions, 19 changer transitions 10/95 dead transitions. [2024-06-21 18:13:51,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 95 transitions, 703 flow [2024-06-21 18:13:51,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:51,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-21 18:13:51,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 18:13:51,044 INFO L175 Difference]: Start difference. First operand has 119 places, 71 transitions, 431 flow. Second operand 9 states and 210 transitions. [2024-06-21 18:13:51,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 95 transitions, 703 flow [2024-06-21 18:13:51,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 95 transitions, 673 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:51,070 INFO L231 Difference]: Finished difference. Result has 112 places, 68 transitions, 421 flow [2024-06-21 18:13:51,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=421, PETRI_PLACES=112, PETRI_TRANSITIONS=68} [2024-06-21 18:13:51,070 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-21 18:13:51,070 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 68 transitions, 421 flow [2024-06-21 18:13:51,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:51,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:51,071 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] [2024-06-21 18:13:51,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 18:13:51,071 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:51,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:51,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1607596237, now seen corresponding path program 33 times [2024-06-21 18:13:51,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:51,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401967731] [2024-06-21 18:13:51,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:51,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:51,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:51,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401967731] [2024-06-21 18:13:51,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401967731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:51,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:51,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:51,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142960875] [2024-06-21 18:13:51,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:51,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:51,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:51,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:51,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:51,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:51,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 68 transitions, 421 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:51,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:51,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:51,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:51,283 INFO L124 PetriNetUnfolderBase]: 371/807 cut-off events. [2024-06-21 18:13:51,283 INFO L125 PetriNetUnfolderBase]: For 8479/8479 co-relation queries the response was YES. [2024-06-21 18:13:51,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2499 conditions, 807 events. 371/807 cut-off events. For 8479/8479 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5269 event pairs, 83 based on Foata normal form. 8/783 useless extension candidates. Maximal degree in co-relation 2456. Up to 403 conditions per place. [2024-06-21 18:13:51,287 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 43 selfloop transitions, 15 changer transitions 21/89 dead transitions. [2024-06-21 18:13:51,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 89 transitions, 623 flow [2024-06-21 18:13:51,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:51,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:51,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-21 18:13:51,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-06-21 18:13:51,290 INFO L175 Difference]: Start difference. First operand has 112 places, 68 transitions, 421 flow. Second operand 9 states and 205 transitions. [2024-06-21 18:13:51,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 89 transitions, 623 flow [2024-06-21 18:13:51,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 89 transitions, 572 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:51,299 INFO L231 Difference]: Finished difference. Result has 110 places, 62 transitions, 356 flow [2024-06-21 18:13:51,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=356, PETRI_PLACES=110, PETRI_TRANSITIONS=62} [2024-06-21 18:13:51,299 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-21 18:13:51,299 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 62 transitions, 356 flow [2024-06-21 18:13:51,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:51,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:51,300 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] [2024-06-21 18:13:51,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 18:13:51,300 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:51,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:51,300 INFO L85 PathProgramCache]: Analyzing trace with hash 934764239, now seen corresponding path program 34 times [2024-06-21 18:13:51,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:51,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233562655] [2024-06-21 18:13:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:51,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:51,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:51,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233562655] [2024-06-21 18:13:51,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233562655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:51,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:51,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:51,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573124052] [2024-06-21 18:13:51,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:51,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:51,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:51,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:51,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:51,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:51,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 62 transitions, 356 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:51,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:51,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:51,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:51,534 INFO L124 PetriNetUnfolderBase]: 372/797 cut-off events. [2024-06-21 18:13:51,534 INFO L125 PetriNetUnfolderBase]: For 11130/11130 co-relation queries the response was YES. [2024-06-21 18:13:51,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2563 conditions, 797 events. 372/797 cut-off events. For 11130/11130 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5233 event pairs, 69 based on Foata normal form. 8/783 useless extension candidates. Maximal degree in co-relation 2521. Up to 198 conditions per place. [2024-06-21 18:13:51,536 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 49 selfloop transitions, 24 changer transitions 9/92 dead transitions. [2024-06-21 18:13:51,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 92 transitions, 684 flow [2024-06-21 18:13:51,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:13:51,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:13:51,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 268 transitions. [2024-06-21 18:13:51,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-21 18:13:51,537 INFO L175 Difference]: Start difference. First operand has 110 places, 62 transitions, 356 flow. Second operand 12 states and 268 transitions. [2024-06-21 18:13:51,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 92 transitions, 684 flow [2024-06-21 18:13:51,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 92 transitions, 613 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:51,545 INFO L231 Difference]: Finished difference. Result has 101 places, 60 transitions, 330 flow [2024-06-21 18:13:51,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=330, PETRI_PLACES=101, PETRI_TRANSITIONS=60} [2024-06-21 18:13:51,546 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-21 18:13:51,546 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 60 transitions, 330 flow [2024-06-21 18:13:51,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:51,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:51,546 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] [2024-06-21 18:13:51,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 18:13:51,546 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:51,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:51,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1211440971, now seen corresponding path program 35 times [2024-06-21 18:13:51,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:51,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413495618] [2024-06-21 18:13:51,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:51,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:51,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:51,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413495618] [2024-06-21 18:13:51,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413495618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:51,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:51,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:51,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058830518] [2024-06-21 18:13:51,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:51,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:51,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:51,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:51,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:51,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:51,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 60 transitions, 330 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:51,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:51,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:51,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:51,760 INFO L124 PetriNetUnfolderBase]: 356/781 cut-off events. [2024-06-21 18:13:51,761 INFO L125 PetriNetUnfolderBase]: For 11068/11068 co-relation queries the response was YES. [2024-06-21 18:13:51,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2486 conditions, 781 events. 356/781 cut-off events. For 11068/11068 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5242 event pairs, 49 based on Foata normal form. 8/765 useless extension candidates. Maximal degree in co-relation 2447. Up to 198 conditions per place. [2024-06-21 18:13:51,763 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 46 selfloop transitions, 19 changer transitions 12/87 dead transitions. [2024-06-21 18:13:51,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 87 transitions, 642 flow [2024-06-21 18:13:51,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:13:51,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:13:51,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-21 18:13:51,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5613636363636364 [2024-06-21 18:13:51,764 INFO L175 Difference]: Start difference. First operand has 101 places, 60 transitions, 330 flow. Second operand 11 states and 247 transitions. [2024-06-21 18:13:51,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 87 transitions, 642 flow [2024-06-21 18:13:51,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 87 transitions, 585 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 18:13:51,773 INFO L231 Difference]: Finished difference. Result has 99 places, 57 transitions, 306 flow [2024-06-21 18:13:51,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=306, PETRI_PLACES=99, PETRI_TRANSITIONS=57} [2024-06-21 18:13:51,773 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 58 predicate places. [2024-06-21 18:13:51,773 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 57 transitions, 306 flow [2024-06-21 18:13:51,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:51,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:51,773 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] [2024-06-21 18:13:51,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 18:13:51,773 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:51,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:51,774 INFO L85 PathProgramCache]: Analyzing trace with hash -850716293, now seen corresponding path program 36 times [2024-06-21 18:13:51,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:51,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207606587] [2024-06-21 18:13:51,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:51,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:51,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:51,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207606587] [2024-06-21 18:13:51,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207606587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:51,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:51,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:51,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931264648] [2024-06-21 18:13:51,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:51,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:51,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:51,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:51,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:51,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:51,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 57 transitions, 306 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:51,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:51,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:51,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:51,950 INFO L124 PetriNetUnfolderBase]: 336/741 cut-off events. [2024-06-21 18:13:51,950 INFO L125 PetriNetUnfolderBase]: For 10234/10234 co-relation queries the response was YES. [2024-06-21 18:13:51,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2349 conditions, 741 events. 336/741 cut-off events. For 10234/10234 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4919 event pairs, 53 based on Foata normal form. 8/725 useless extension candidates. Maximal degree in co-relation 2311. Up to 294 conditions per place. [2024-06-21 18:13:51,952 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 40 selfloop transitions, 15 changer transitions 10/75 dead transitions. [2024-06-21 18:13:51,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 75 transitions, 522 flow [2024-06-21 18:13:51,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:51,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:51,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 18:13:51,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-21 18:13:51,953 INFO L175 Difference]: Start difference. First operand has 99 places, 57 transitions, 306 flow. Second operand 8 states and 183 transitions. [2024-06-21 18:13:51,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 75 transitions, 522 flow [2024-06-21 18:13:51,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 75 transitions, 474 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:51,960 INFO L231 Difference]: Finished difference. Result has 93 places, 54 transitions, 280 flow [2024-06-21 18:13:51,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=280, PETRI_PLACES=93, PETRI_TRANSITIONS=54} [2024-06-21 18:13:51,961 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 52 predicate places. [2024-06-21 18:13:51,961 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 54 transitions, 280 flow [2024-06-21 18:13:51,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:51,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:51,961 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] [2024-06-21 18:13:51,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 18:13:51,961 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:51,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:51,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1039660671, now seen corresponding path program 37 times [2024-06-21 18:13:51,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:51,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208832169] [2024-06-21 18:13:51,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:51,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:52,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:52,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208832169] [2024-06-21 18:13:52,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208832169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:52,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:52,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:52,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153409378] [2024-06-21 18:13:52,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:52,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:52,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:52,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:52,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:52,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:52,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 54 transitions, 280 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:52,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:52,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:52,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:52,195 INFO L124 PetriNetUnfolderBase]: 308/681 cut-off events. [2024-06-21 18:13:52,195 INFO L125 PetriNetUnfolderBase]: For 8692/8692 co-relation queries the response was YES. [2024-06-21 18:13:52,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2149 conditions, 681 events. 308/681 cut-off events. For 8692/8692 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 4409 event pairs, 129 based on Foata normal form. 8/657 useless extension candidates. Maximal degree in co-relation 2113. Up to 377 conditions per place. [2024-06-21 18:13:52,197 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 48 selfloop transitions, 8 changer transitions 9/75 dead transitions. [2024-06-21 18:13:52,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 75 transitions, 498 flow [2024-06-21 18:13:52,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:52,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-21 18:13:52,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5475 [2024-06-21 18:13:52,198 INFO L175 Difference]: Start difference. First operand has 93 places, 54 transitions, 280 flow. Second operand 10 states and 219 transitions. [2024-06-21 18:13:52,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 75 transitions, 498 flow [2024-06-21 18:13:52,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 75 transitions, 458 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:52,203 INFO L231 Difference]: Finished difference. Result has 92 places, 52 transitions, 253 flow [2024-06-21 18:13:52,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=253, PETRI_PLACES=92, PETRI_TRANSITIONS=52} [2024-06-21 18:13:52,203 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-06-21 18:13:52,203 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 52 transitions, 253 flow [2024-06-21 18:13:52,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:52,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:52,204 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] [2024-06-21 18:13:52,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 18:13:52,204 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:52,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:52,204 INFO L85 PathProgramCache]: Analyzing trace with hash -14995799, now seen corresponding path program 38 times [2024-06-21 18:13:52,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:52,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796805808] [2024-06-21 18:13:52,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:52,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:52,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:52,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796805808] [2024-06-21 18:13:52,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796805808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:52,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:52,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:52,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807044607] [2024-06-21 18:13:52,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:52,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:52,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:52,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:52,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:52,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:52,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 52 transitions, 253 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:52,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:52,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:52,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:52,431 INFO L124 PetriNetUnfolderBase]: 320/717 cut-off events. [2024-06-21 18:13:52,431 INFO L125 PetriNetUnfolderBase]: For 8977/8977 co-relation queries the response was YES. [2024-06-21 18:13:52,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2263 conditions, 717 events. 320/717 cut-off events. For 8977/8977 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4790 event pairs, 38 based on Foata normal form. 8/701 useless extension candidates. Maximal degree in co-relation 2229. Up to 192 conditions per place. [2024-06-21 18:13:52,433 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 44 selfloop transitions, 17 changer transitions 6/77 dead transitions. [2024-06-21 18:13:52,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 77 transitions, 521 flow [2024-06-21 18:13:52,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:13:52,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:13:52,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-21 18:13:52,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-06-21 18:13:52,434 INFO L175 Difference]: Start difference. First operand has 92 places, 52 transitions, 253 flow. Second operand 11 states and 244 transitions. [2024-06-21 18:13:52,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 77 transitions, 521 flow [2024-06-21 18:13:52,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 77 transitions, 494 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:52,439 INFO L231 Difference]: Finished difference. Result has 92 places, 50 transitions, 261 flow [2024-06-21 18:13:52,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=261, PETRI_PLACES=92, PETRI_TRANSITIONS=50} [2024-06-21 18:13:52,439 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-06-21 18:13:52,439 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 50 transitions, 261 flow [2024-06-21 18:13:52,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:52,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:52,440 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] [2024-06-21 18:13:52,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 18:13:52,440 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:52,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:52,440 INFO L85 PathProgramCache]: Analyzing trace with hash -872380069, now seen corresponding path program 39 times [2024-06-21 18:13:52,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:52,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599645187] [2024-06-21 18:13:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:52,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:52,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:52,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599645187] [2024-06-21 18:13:52,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599645187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:52,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:52,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:52,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100809927] [2024-06-21 18:13:52,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:52,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:52,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:52,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:52,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:52,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:52,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 50 transitions, 261 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:52,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:52,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:52,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:52,657 INFO L124 PetriNetUnfolderBase]: 304/685 cut-off events. [2024-06-21 18:13:52,657 INFO L125 PetriNetUnfolderBase]: For 8246/8246 co-relation queries the response was YES. [2024-06-21 18:13:52,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2220 conditions, 685 events. 304/685 cut-off events. For 8246/8246 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4566 event pairs, 64 based on Foata normal form. 8/665 useless extension candidates. Maximal degree in co-relation 2187. Up to 172 conditions per place. [2024-06-21 18:13:52,660 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 45 selfloop transitions, 17 changer transitions 9/81 dead transitions. [2024-06-21 18:13:52,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 81 transitions, 545 flow [2024-06-21 18:13:52,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 18:13:52,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 18:13:52,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 286 transitions. [2024-06-21 18:13:52,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 18:13:52,661 INFO L175 Difference]: Start difference. First operand has 92 places, 50 transitions, 261 flow. Second operand 13 states and 286 transitions. [2024-06-21 18:13:52,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 81 transitions, 545 flow [2024-06-21 18:13:52,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 81 transitions, 505 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:52,666 INFO L231 Difference]: Finished difference. Result has 94 places, 48 transitions, 255 flow [2024-06-21 18:13:52,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=255, PETRI_PLACES=94, PETRI_TRANSITIONS=48} [2024-06-21 18:13:52,667 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2024-06-21 18:13:52,667 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 48 transitions, 255 flow [2024-06-21 18:13:52,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:52,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:52,667 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] [2024-06-21 18:13:52,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 18:13:52,667 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:52,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:52,667 INFO L85 PathProgramCache]: Analyzing trace with hash 920284487, now seen corresponding path program 40 times [2024-06-21 18:13:52,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:52,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758754519] [2024-06-21 18:13:52,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:52,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:52,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:52,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758754519] [2024-06-21 18:13:52,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758754519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:52,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:52,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:52,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718211612] [2024-06-21 18:13:52,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:52,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:52,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:52,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:52,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:52,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:52,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 48 transitions, 255 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:52,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:52,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:52,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:52,902 INFO L124 PetriNetUnfolderBase]: 260/593 cut-off events. [2024-06-21 18:13:52,902 INFO L125 PetriNetUnfolderBase]: For 5948/5948 co-relation queries the response was YES. [2024-06-21 18:13:52,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1879 conditions, 593 events. 260/593 cut-off events. For 5948/5948 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3741 event pairs, 137 based on Foata normal form. 8/567 useless extension candidates. Maximal degree in co-relation 1847. Up to 381 conditions per place. [2024-06-21 18:13:52,904 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 32 selfloop transitions, 4 changer transitions 15/61 dead transitions. [2024-06-21 18:13:52,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 61 transitions, 383 flow [2024-06-21 18:13:52,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:52,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:52,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-21 18:13:52,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-21 18:13:52,904 INFO L175 Difference]: Start difference. First operand has 94 places, 48 transitions, 255 flow. Second operand 8 states and 175 transitions. [2024-06-21 18:13:52,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 61 transitions, 383 flow [2024-06-21 18:13:52,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 61 transitions, 349 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 18:13:52,908 INFO L231 Difference]: Finished difference. Result has 89 places, 44 transitions, 209 flow [2024-06-21 18:13:52,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=209, PETRI_PLACES=89, PETRI_TRANSITIONS=44} [2024-06-21 18:13:52,908 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-21 18:13:52,908 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 44 transitions, 209 flow [2024-06-21 18:13:52,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:52,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:52,908 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] [2024-06-21 18:13:52,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 18:13:52,908 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:52,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:52,909 INFO L85 PathProgramCache]: Analyzing trace with hash 547092809, now seen corresponding path program 41 times [2024-06-21 18:13:52,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:52,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753344372] [2024-06-21 18:13:52,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:52,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:52,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:52,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753344372] [2024-06-21 18:13:52,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753344372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:52,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:52,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:52,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348778188] [2024-06-21 18:13:52,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:52,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:52,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:52,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:52,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:53,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:53,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 44 transitions, 209 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:53,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:53,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:53,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:53,086 INFO L124 PetriNetUnfolderBase]: 210/471 cut-off events. [2024-06-21 18:13:53,086 INFO L125 PetriNetUnfolderBase]: For 3993/3993 co-relation queries the response was YES. [2024-06-21 18:13:53,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1400 conditions, 471 events. 210/471 cut-off events. For 3993/3993 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2729 event pairs, 41 based on Foata normal form. 8/461 useless extension candidates. Maximal degree in co-relation 1369. Up to 188 conditions per place. [2024-06-21 18:13:53,088 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 27 selfloop transitions, 8 changer transitions 17/62 dead transitions. [2024-06-21 18:13:53,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 62 transitions, 349 flow [2024-06-21 18:13:53,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:53,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:53,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-21 18:13:53,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-21 18:13:53,088 INFO L175 Difference]: Start difference. First operand has 89 places, 44 transitions, 209 flow. Second operand 9 states and 199 transitions. [2024-06-21 18:13:53,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 62 transitions, 349 flow [2024-06-21 18:13:53,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 62 transitions, 335 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:53,091 INFO L231 Difference]: Finished difference. Result has 82 places, 39 transitions, 182 flow [2024-06-21 18:13:53,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=182, PETRI_PLACES=82, PETRI_TRANSITIONS=39} [2024-06-21 18:13:53,091 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-06-21 18:13:53,091 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 39 transitions, 182 flow [2024-06-21 18:13:53,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:53,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:53,092 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] [2024-06-21 18:13:53,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 18:13:53,092 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:53,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:53,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1025320251, now seen corresponding path program 42 times [2024-06-21 18:13:53,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:53,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369103215] [2024-06-21 18:13:53,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:53,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:53,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:53,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369103215] [2024-06-21 18:13:53,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369103215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:53,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:53,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:53,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855698543] [2024-06-21 18:13:53,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:53,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:53,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:53,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:53,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:53,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:53,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 39 transitions, 182 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:53,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:53,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:53,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:53,256 INFO L124 PetriNetUnfolderBase]: 179/410 cut-off events. [2024-06-21 18:13:53,256 INFO L125 PetriNetUnfolderBase]: For 3178/3178 co-relation queries the response was YES. [2024-06-21 18:13:53,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1222 conditions, 410 events. 179/410 cut-off events. For 3178/3178 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2375 event pairs, 15 based on Foata normal form. 8/408 useless extension candidates. Maximal degree in co-relation 1193. Up to 84 conditions per place. [2024-06-21 18:13:53,257 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 29 selfloop transitions, 9 changer transitions 12/60 dead transitions. [2024-06-21 18:13:53,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 60 transitions, 356 flow [2024-06-21 18:13:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:53,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-21 18:13:53,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425 [2024-06-21 18:13:53,258 INFO L175 Difference]: Start difference. First operand has 82 places, 39 transitions, 182 flow. Second operand 10 states and 217 transitions. [2024-06-21 18:13:53,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 60 transitions, 356 flow [2024-06-21 18:13:53,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 60 transitions, 320 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 18:13:53,260 INFO L231 Difference]: Finished difference. Result has 71 places, 36 transitions, 159 flow [2024-06-21 18:13:53,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=159, PETRI_PLACES=71, PETRI_TRANSITIONS=36} [2024-06-21 18:13:53,261 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-06-21 18:13:53,261 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 36 transitions, 159 flow [2024-06-21 18:13:53,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:53,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:53,262 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] [2024-06-21 18:13:53,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 18:13:53,262 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:53,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:53,263 INFO L85 PathProgramCache]: Analyzing trace with hash -18720449, now seen corresponding path program 43 times [2024-06-21 18:13:53,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:53,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676216715] [2024-06-21 18:13:53,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:53,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:53,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:53,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676216715] [2024-06-21 18:13:53,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676216715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:53,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:53,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:53,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808409246] [2024-06-21 18:13:53,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:53,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:53,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:53,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:53,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:53,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:53,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 36 transitions, 159 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:53,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:53,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:53,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:53,463 INFO L124 PetriNetUnfolderBase]: 159/370 cut-off events. [2024-06-21 18:13:53,463 INFO L125 PetriNetUnfolderBase]: For 1838/1838 co-relation queries the response was YES. [2024-06-21 18:13:53,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 370 events. 159/370 cut-off events. For 1838/1838 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2105 event pairs, 37 based on Foata normal form. 8/362 useless extension candidates. Maximal degree in co-relation 1045. Up to 189 conditions per place. [2024-06-21 18:13:53,464 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 23 selfloop transitions, 5 changer transitions 13/51 dead transitions. [2024-06-21 18:13:53,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 51 transitions, 271 flow [2024-06-21 18:13:53,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:53,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:53,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-21 18:13:53,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 18:13:53,466 INFO L175 Difference]: Start difference. First operand has 71 places, 36 transitions, 159 flow. Second operand 8 states and 176 transitions. [2024-06-21 18:13:53,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 51 transitions, 271 flow [2024-06-21 18:13:53,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 51 transitions, 248 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:53,467 INFO L231 Difference]: Finished difference. Result has 66 places, 33 transitions, 134 flow [2024-06-21 18:13:53,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=134, PETRI_PLACES=66, PETRI_TRANSITIONS=33} [2024-06-21 18:13:53,468 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-21 18:13:53,468 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 33 transitions, 134 flow [2024-06-21 18:13:53,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:53,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:53,469 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] [2024-06-21 18:13:53,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 18:13:53,469 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:53,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:53,469 INFO L85 PathProgramCache]: Analyzing trace with hash -595602997, now seen corresponding path program 44 times [2024-06-21 18:13:53,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:53,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708011785] [2024-06-21 18:13:53,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:53,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:53,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:53,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708011785] [2024-06-21 18:13:53,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708011785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:53,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:53,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:53,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089167120] [2024-06-21 18:13:53,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:53,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:53,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:53,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:53,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:53,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:53,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 33 transitions, 134 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:53,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:53,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:53,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:53,665 INFO L124 PetriNetUnfolderBase]: 103/242 cut-off events. [2024-06-21 18:13:53,665 INFO L125 PetriNetUnfolderBase]: For 882/882 co-relation queries the response was YES. [2024-06-21 18:13:53,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 242 events. 103/242 cut-off events. For 882/882 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1118 event pairs, 11 based on Foata normal form. 8/244 useless extension candidates. Maximal degree in co-relation 641. Up to 80 conditions per place. [2024-06-21 18:13:53,665 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 21 selfloop transitions, 4 changer transitions 15/50 dead transitions. [2024-06-21 18:13:53,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 50 transitions, 248 flow [2024-06-21 18:13:53,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:53,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:53,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-21 18:13:53,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275 [2024-06-21 18:13:53,666 INFO L175 Difference]: Start difference. First operand has 66 places, 33 transitions, 134 flow. Second operand 10 states and 211 transitions. [2024-06-21 18:13:53,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 50 transitions, 248 flow [2024-06-21 18:13:53,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 50 transitions, 234 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:53,667 INFO L231 Difference]: Finished difference. Result has 65 places, 29 transitions, 109 flow [2024-06-21 18:13:53,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=109, PETRI_PLACES=65, PETRI_TRANSITIONS=29} [2024-06-21 18:13:53,667 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-21 18:13:53,667 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 29 transitions, 109 flow [2024-06-21 18:13:53,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:53,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:53,668 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] [2024-06-21 18:13:53,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 18:13:53,668 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:53,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:53,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1188465675, now seen corresponding path program 45 times [2024-06-21 18:13:53,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:53,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317787469] [2024-06-21 18:13:53,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:53,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:53,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:53,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317787469] [2024-06-21 18:13:53,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317787469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:53,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:53,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:53,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058788250] [2024-06-21 18:13:53,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:53,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:53,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:53,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:53,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:53,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 18:13:53,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 29 transitions, 109 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:53,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:53,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 18:13:53,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:53,830 INFO L124 PetriNetUnfolderBase]: 51/134 cut-off events. [2024-06-21 18:13:53,830 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2024-06-21 18:13:53,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 134 events. 51/134 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 471 event pairs, 1 based on Foata normal form. 8/142 useless extension candidates. Maximal degree in co-relation 321. Up to 40 conditions per place. [2024-06-21 18:13:53,830 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 0 selfloop transitions, 0 changer transitions 39/39 dead transitions. [2024-06-21 18:13:53,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 39 transitions, 169 flow [2024-06-21 18:13:53,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:53,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:53,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 18:13:53,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-06-21 18:13:53,831 INFO L175 Difference]: Start difference. First operand has 65 places, 29 transitions, 109 flow. Second operand 8 states and 166 transitions. [2024-06-21 18:13:53,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 39 transitions, 169 flow [2024-06-21 18:13:53,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 39 transitions, 152 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:53,832 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2024-06-21 18:13:53,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2024-06-21 18:13:53,832 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-06-21 18:13:53,832 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2024-06-21 18:13:53,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:53,834 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-21 18:13:53,835 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-21 18:13:53,835 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-21 18:13:53,835 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-21 18:13:53,835 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-21 18:13:53,835 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-21 18:13:53,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 18:13:53,836 INFO L445 BasicCegarLoop]: Path program histogram: [45, 18, 14, 11, 7, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2024-06-21 18:13:53,838 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 18:13:53,838 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 18:13:53,840 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-21 18:13:53,841 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-21 18:13:53,842 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 06:13:53 BasicIcfg [2024-06-21 18:13:53,842 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 18:13:53,842 INFO L158 Benchmark]: Toolchain (without parser) took 44307.61ms. Allocated memory was 186.6MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 157.2MB in the beginning and 1.2GB in the end (delta: -1.0GB). Peak memory consumption was 86.0MB. Max. memory is 16.1GB. [2024-06-21 18:13:53,842 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 125.8MB. Free memory was 90.1MB in the beginning and 90.0MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 18:13:53,842 INFO L158 Benchmark]: CDTParser took 0.73ms. Allocated memory is still 125.8MB. Free memory is still 97.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 18:13:53,842 INFO L158 Benchmark]: CACSL2BoogieTranslator took 506.00ms. Allocated memory is still 186.6MB. Free memory was 157.2MB in the beginning and 132.2MB in the end (delta: 25.0MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-21 18:13:53,843 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.65ms. Allocated memory is still 186.6MB. Free memory was 132.2MB in the beginning and 130.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 18:13:53,843 INFO L158 Benchmark]: Boogie Preprocessor took 39.35ms. Allocated memory is still 186.6MB. Free memory was 130.1MB in the beginning and 127.9MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 18:13:53,843 INFO L158 Benchmark]: RCFGBuilder took 398.57ms. Allocated memory is still 186.6MB. Free memory was 127.9MB in the beginning and 105.8MB in the end (delta: 22.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-06-21 18:13:53,843 INFO L158 Benchmark]: TraceAbstraction took 43299.82ms. Allocated memory was 186.6MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 104.9MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 33.5MB. Max. memory is 16.1GB. [2024-06-21 18:13:53,844 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.17ms. Allocated memory is still 125.8MB. Free memory was 90.1MB in the beginning and 90.0MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.73ms. Allocated memory is still 125.8MB. Free memory is still 97.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 506.00ms. Allocated memory is still 186.6MB. Free memory was 157.2MB in the beginning and 132.2MB in the end (delta: 25.0MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.65ms. Allocated memory is still 186.6MB. Free memory was 132.2MB in the beginning and 130.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.35ms. Allocated memory is still 186.6MB. Free memory was 130.1MB in the beginning and 127.9MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 398.57ms. Allocated memory is still 186.6MB. Free memory was 127.9MB in the beginning and 105.8MB in the end (delta: 22.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 43299.82ms. Allocated memory was 186.6MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 104.9MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 33.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 783]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 785]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 786]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 65 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 43.2s, OverallIterations: 118, TraceHistogramMax: 1, PathProgramHistogramMax: 45, EmptinessCheckTime: 0.0s, AutomataDifference: 32.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8898 SdHoareTripleChecker+Valid, 9.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7578 mSDsluCounter, 2473 SdHoareTripleChecker+Invalid, 8.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1526 mSDsCounter, 853 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23721 IncrementalHoareTripleChecker+Invalid, 24574 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 853 mSolverCounterUnsat, 947 mSDtfsCounter, 23721 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 996 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 995 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2536occurred in iteration=60, InterpolantAutomatonStates: 988, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 9.8s InterpolantComputationTime, 2181 NumberOfCodeBlocks, 2181 NumberOfCodeBlocksAsserted, 118 NumberOfCheckSat, 2063 ConstructedInterpolants, 0 QuantifiedInterpolants, 19437 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 118 InterpolantComputations, 118 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 18:13:53,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE