./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-mult-4.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7c74aec Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-mult-4.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.fix-undeclared-acsl-variable-e7c74ae-m [2024-02-07 19:18:48,212 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 19:18:48,273 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 19:18:48,276 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 19:18:48,277 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 19:18:48,305 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 19:18:48,305 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 19:18:48,305 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 19:18:48,306 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 19:18:48,309 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 19:18:48,309 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 19:18:48,309 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 19:18:48,310 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 19:18:48,311 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 19:18:48,311 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 19:18:48,312 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 19:18:48,312 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 19:18:48,312 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 19:18:48,312 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 19:18:48,312 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 19:18:48,313 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 19:18:48,314 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 19:18:48,314 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 19:18:48,314 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 19:18:48,314 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 19:18:48,315 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 19:18:48,315 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 19:18:48,315 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 19:18:48,315 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 19:18:48,316 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 19:18:48,316 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 19:18:48,317 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 19:18:48,317 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:18:48,317 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 19:18:48,317 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 19:18:48,317 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 19:18:48,318 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 19:18:48,318 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 19:18:48,318 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 19:18:48,318 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 19:18:48,318 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 19:18:48,319 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 19:18:48,319 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 19:18:48,319 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 19:18:48,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 19:18:48,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 19:18:48,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 19:18:48,556 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 19:18:48,558 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 19:18:48,559 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-mult-4.wvr.yml/witness.yml [2024-02-07 19:18:48,641 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 19:18:48,642 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 19:18:48,644 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2024-02-07 19:18:49,684 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 19:18:49,885 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 19:18:49,885 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2024-02-07 19:18:49,892 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33425b936/841a6bcf28f34cdaa27972e4c653059a/FLAG8c9a871df [2024-02-07 19:18:49,909 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33425b936/841a6bcf28f34cdaa27972e4c653059a [2024-02-07 19:18:49,909 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 19:18:49,910 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 19:18:49,913 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 19:18:49,913 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 19:18:49,917 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 19:18:49,918 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:18:48" (1/2) ... [2024-02-07 19:18:49,919 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eda6dc9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:18:49, skipping insertion in model container [2024-02-07 19:18:49,919 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:18:48" (1/2) ... [2024-02-07 19:18:49,920 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@9ca8722 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:18:49, skipping insertion in model container [2024-02-07 19:18:49,920 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:18:49" (2/2) ... [2024-02-07 19:18:49,921 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eda6dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:49, skipping insertion in model container [2024-02-07 19:18:49,921 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:18:49" (2/2) ... [2024-02-07 19:18:49,922 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 19:18:49,941 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 19:18:49,942 INFO L76 edCorrectnessWitness]: Location invariant before [L85-L85] ((((0LL - (long long )c) + (long long )counter >= 0LL) && ((long long )c + (long long )counter >= 0LL)) && ((0LL - (long long )c) - (long long )counter >= 0LL)) && ((long long )c - (long long )counter >= 0LL) [2024-02-07 19:18:49,942 INFO L76 edCorrectnessWitness]: Location invariant before [L86-L86] ((((0LL - (long long )c) + (long long )counter >= 0LL) && ((long long )c + (long long )counter >= 0LL)) && ((0LL - (long long )c) - (long long )counter >= 0LL)) && ((long long )c - (long long )counter >= 0LL) [2024-02-07 19:18:49,961 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 19:18:50,143 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c[2664,2677] [2024-02-07 19:18:50,149 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:18:50,156 INFO L206 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local [2024-02-07 19:18:50,217 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c[2664,2677] [2024-02-07 19:18:50,218 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:18:50,230 INFO L211 MainTranslator]: Completed translation [2024-02-07 19:18:50,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:50 WrapperNode [2024-02-07 19:18:50,231 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 19:18:50,231 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 19:18:50,231 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 19:18:50,232 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 19:18:50,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:50" (1/1) ... [2024-02-07 19:18:50,242 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:50" (1/1) ... [2024-02-07 19:18:50,268 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 124 [2024-02-07 19:18:50,268 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 19:18:50,269 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 19:18:50,269 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 19:18:50,269 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 19:18:50,280 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:50" (1/1) ... [2024-02-07 19:18:50,280 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:50" (1/1) ... [2024-02-07 19:18:50,282 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:50" (1/1) ... [2024-02-07 19:18:50,296 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-02-07 19:18:50,296 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:50" (1/1) ... [2024-02-07 19:18:50,296 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:50" (1/1) ... [2024-02-07 19:18:50,301 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:50" (1/1) ... [2024-02-07 19:18:50,304 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:50" (1/1) ... [2024-02-07 19:18:50,305 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:50" (1/1) ... [2024-02-07 19:18:50,306 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:50" (1/1) ... [2024-02-07 19:18:50,308 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 19:18:50,309 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 19:18:50,309 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 19:18:50,309 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 19:18:50,310 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:50" (1/1) ... [2024-02-07 19:18:50,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:18:50,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:18:50,332 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-07 19:18:50,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-07 19:18:50,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 19:18:50,377 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 19:18:50,377 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 19:18:50,377 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 19:18:50,377 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 19:18:50,378 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-07 19:18:50,378 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-07 19:18:50,378 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-02-07 19:18:50,378 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-02-07 19:18:50,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 19:18:50,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 19:18:50,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 19:18:50,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 19:18:50,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-07 19:18:50,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 19:18:50,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 19:18:50,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 19:18:50,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 19:18:50,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 19:18:50,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-07 19:18:50,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 19:18:50,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 19:18:50,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 19:18:50,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 19:18:50,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 19:18:50,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 19:18:50,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 19:18:50,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 19:18:50,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-07 19:18:50,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 19:18:50,386 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 19:18:50,511 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 19:18:50,513 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 19:18:50,722 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 19:18:50,722 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 19:18:50,858 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 19:18:50,858 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-02-07 19:18:50,859 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:18:50 BoogieIcfgContainer [2024-02-07 19:18:50,859 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 19:18:50,860 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 19:18:50,860 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 19:18:50,863 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 19:18:50,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:18:48" (1/4) ... [2024-02-07 19:18:50,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4f1750 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:18:50, skipping insertion in model container [2024-02-07 19:18:50,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 07:18:49" (2/4) ... [2024-02-07 19:18:50,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4f1750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:18:50, skipping insertion in model container [2024-02-07 19:18:50,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:50" (3/4) ... [2024-02-07 19:18:50,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4f1750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:18:50, skipping insertion in model container [2024-02-07 19:18:50,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:18:50" (4/4) ... [2024-02-07 19:18:50,877 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2024-02-07 19:18:50,889 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 19:18:50,891 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-02-07 19:18:50,891 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 19:18:50,936 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-02-07 19:18:50,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 122 flow [2024-02-07 19:18:50,983 INFO L124 PetriNetUnfolderBase]: 4/43 cut-off events. [2024-02-07 19:18:50,986 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-07 19:18:50,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 43 events. 4/43 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 53 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-02-07 19:18:50,990 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 122 flow [2024-02-07 19:18:50,992 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 42 transitions, 108 flow [2024-02-07 19:18:51,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:18:51,005 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;@740930a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:18:51,005 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-02-07 19:18:51,007 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:18:51,007 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 19:18:51,007 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:18:51,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:51,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 19:18:51,008 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 19:18:51,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:51,012 INFO L85 PathProgramCache]: Analyzing trace with hash 12450, now seen corresponding path program 1 times [2024-02-07 19:18:51,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:51,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413604384] [2024-02-07 19:18:51,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:51,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:18:51,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:51,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413604384] [2024-02-07 19:18:51,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413604384] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:18:51,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:18:51,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:18:51,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093579305] [2024-02-07 19:18:51,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:18:51,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:18:51,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:51,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:18:51,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:18:51,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-02-07 19:18:51,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:18:51,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:51,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-02-07 19:18:51,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:18:51,643 INFO L124 PetriNetUnfolderBase]: 1623/2214 cut-off events. [2024-02-07 19:18:51,670 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-02-07 19:18:51,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4535 conditions, 2214 events. 1623/2214 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8237 event pairs, 1109 based on Foata normal form. 0/2148 useless extension candidates. Maximal degree in co-relation 3505. Up to 2145 conditions per place. [2024-02-07 19:18:51,686 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 31 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2024-02-07 19:18:51,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 40 transitions, 170 flow [2024-02-07 19:18:51,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:18:51,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:18:51,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-02-07 19:18:51,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48226950354609927 [2024-02-07 19:18:51,698 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 108 flow. Second operand 3 states and 68 transitions. [2024-02-07 19:18:51,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 40 transitions, 170 flow [2024-02-07 19:18:51,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 40 transitions, 154 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-02-07 19:18:51,709 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 92 flow [2024-02-07 19:18:51,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2024-02-07 19:18:51,713 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -8 predicate places. [2024-02-07 19:18:51,713 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 92 flow [2024-02-07 19:18:51,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:18:51,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:51,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:18:51,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 19:18:51,714 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 19:18:51,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:51,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1609689637, now seen corresponding path program 1 times [2024-02-07 19:18:51,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:51,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528581355] [2024-02-07 19:18:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:51,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:18:51,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:51,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528581355] [2024-02-07 19:18:51,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528581355] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:18:51,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:18:51,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:18:51,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458881249] [2024-02-07 19:18:51,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:18:51,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:18:51,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:51,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:18:51,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:18:51,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-02-07 19:18:51,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:18:51,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:51,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-02-07 19:18:51,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:18:52,294 INFO L124 PetriNetUnfolderBase]: 3350/4626 cut-off events. [2024-02-07 19:18:52,294 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-02-07 19:18:52,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9218 conditions, 4626 events. 3350/4626 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20124 event pairs, 860 based on Foata normal form. 147/4763 useless extension candidates. Maximal degree in co-relation 9207. Up to 3527 conditions per place. [2024-02-07 19:18:52,317 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 53 selfloop transitions, 3 changer transitions 3/64 dead transitions. [2024-02-07 19:18:52,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 64 transitions, 265 flow [2024-02-07 19:18:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:18:52,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:18:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-02-07 19:18:52,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6737588652482269 [2024-02-07 19:18:52,326 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 92 flow. Second operand 3 states and 95 transitions. [2024-02-07 19:18:52,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 64 transitions, 265 flow [2024-02-07 19:18:52,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 64 transitions, 261 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:18:52,329 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 111 flow [2024-02-07 19:18:52,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2024-02-07 19:18:52,330 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -7 predicate places. [2024-02-07 19:18:52,330 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 111 flow [2024-02-07 19:18:52,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:18:52,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:52,331 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:18:52,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 19:18:52,331 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 19:18:52,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:52,333 INFO L85 PathProgramCache]: Analyzing trace with hash 365314403, now seen corresponding path program 1 times [2024-02-07 19:18:52,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:52,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650461214] [2024-02-07 19:18:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:52,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:18:52,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:52,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650461214] [2024-02-07 19:18:52,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650461214] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:18:52,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:18:52,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 19:18:52,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275474341] [2024-02-07 19:18:52,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:18:52,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 19:18:52,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:52,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 19:18:52,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-02-07 19:18:52,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 19:18:52,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:18:52,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:52,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 19:18:52,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:18:53,551 INFO L124 PetriNetUnfolderBase]: 12613/16841 cut-off events. [2024-02-07 19:18:53,552 INFO L125 PetriNetUnfolderBase]: For 987/987 co-relation queries the response was YES. [2024-02-07 19:18:53,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35680 conditions, 16841 events. 12613/16841 cut-off events. For 987/987 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 85410 event pairs, 4709 based on Foata normal form. 0/13337 useless extension candidates. Maximal degree in co-relation 10232. Up to 9446 conditions per place. [2024-02-07 19:18:53,644 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 86 selfloop transitions, 10 changer transitions 0/101 dead transitions. [2024-02-07 19:18:53,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 101 transitions, 438 flow [2024-02-07 19:18:53,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:18:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:18:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-02-07 19:18:53,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6127659574468085 [2024-02-07 19:18:53,646 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 111 flow. Second operand 5 states and 144 transitions. [2024-02-07 19:18:53,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 101 transitions, 438 flow [2024-02-07 19:18:53,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 101 transitions, 435 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:18:53,649 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 175 flow [2024-02-07 19:18:53,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2024-02-07 19:18:53,650 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2024-02-07 19:18:53,650 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 175 flow [2024-02-07 19:18:53,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:18:53,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:53,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:18:53,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 19:18:53,651 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 19:18:53,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:53,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1482639371, now seen corresponding path program 2 times [2024-02-07 19:18:53,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:53,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072279691] [2024-02-07 19:18:53,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:53,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:18:53,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:53,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072279691] [2024-02-07 19:18:53,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072279691] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:18:53,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:18:53,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:18:53,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968497613] [2024-02-07 19:18:53,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:18:53,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:18:53,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:53,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:18:53,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:18:53,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 19:18:53,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 175 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:18:53,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:53,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 19:18:53,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:18:55,234 INFO L124 PetriNetUnfolderBase]: 18418/24775 cut-off events. [2024-02-07 19:18:55,235 INFO L125 PetriNetUnfolderBase]: For 10865/10943 co-relation queries the response was YES. [2024-02-07 19:18:55,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64830 conditions, 24775 events. 18418/24775 cut-off events. For 10865/10943 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 135042 event pairs, 3252 based on Foata normal form. 714/25077 useless extension candidates. Maximal degree in co-relation 37332. Up to 13675 conditions per place. [2024-02-07 19:18:55,330 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 93 selfloop transitions, 8 changer transitions 3/109 dead transitions. [2024-02-07 19:18:55,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 109 transitions, 574 flow [2024-02-07 19:18:55,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:18:55,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:18:55,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-02-07 19:18:55,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6542553191489362 [2024-02-07 19:18:55,333 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 175 flow. Second operand 4 states and 123 transitions. [2024-02-07 19:18:55,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 109 transitions, 574 flow [2024-02-07 19:18:55,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 109 transitions, 574 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:18:55,343 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 261 flow [2024-02-07 19:18:55,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=261, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2024-02-07 19:18:55,344 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2024-02-07 19:18:55,345 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 261 flow [2024-02-07 19:18:55,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:18:55,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:55,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:18:55,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 19:18:55,346 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 19:18:55,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:55,346 INFO L85 PathProgramCache]: Analyzing trace with hash -44138523, now seen corresponding path program 1 times [2024-02-07 19:18:55,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:55,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474532198] [2024-02-07 19:18:55,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:55,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:18:55,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:55,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474532198] [2024-02-07 19:18:55,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474532198] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:18:55,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:18:55,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 19:18:55,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136534020] [2024-02-07 19:18:55,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:18:55,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 19:18:55,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:55,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 19:18:55,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-07 19:18:55,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 19:18:55,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 261 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:18:55,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:55,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 19:18:55,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:18:57,013 INFO L124 PetriNetUnfolderBase]: 20614/27802 cut-off events. [2024-02-07 19:18:57,013 INFO L125 PetriNetUnfolderBase]: For 28835/28857 co-relation queries the response was YES. [2024-02-07 19:18:57,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81180 conditions, 27802 events. 20614/27802 cut-off events. For 28835/28857 co-relation queries the response was YES. Maximal size of possible extension queue 1107. Compared 154836 event pairs, 6009 based on Foata normal form. 892/28098 useless extension candidates. Maximal degree in co-relation 45206. Up to 12265 conditions per place. [2024-02-07 19:18:57,306 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 92 selfloop transitions, 9 changer transitions 19/125 dead transitions. [2024-02-07 19:18:57,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 125 transitions, 738 flow [2024-02-07 19:18:57,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:18:57,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:18:57,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-02-07 19:18:57,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-02-07 19:18:57,309 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 261 flow. Second operand 5 states and 150 transitions. [2024-02-07 19:18:57,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 125 transitions, 738 flow [2024-02-07 19:18:57,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 125 transitions, 738 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:18:57,324 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 312 flow [2024-02-07 19:18:57,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-02-07 19:18:57,326 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2024-02-07 19:18:57,326 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 312 flow [2024-02-07 19:18:57,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:18:57,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:57,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:18:57,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 19:18:57,327 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 19:18:57,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:57,327 INFO L85 PathProgramCache]: Analyzing trace with hash 885229711, now seen corresponding path program 2 times [2024-02-07 19:18:57,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:57,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956131996] [2024-02-07 19:18:57,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:57,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:18:57,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:57,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956131996] [2024-02-07 19:18:57,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956131996] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:18:57,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:18:57,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:18:57,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483803868] [2024-02-07 19:18:57,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:18:57,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:18:57,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:57,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:18:57,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:18:57,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 19:18:57,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:18:57,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:57,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 19:18:57,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:18:59,510 INFO L124 PetriNetUnfolderBase]: 26033/35401 cut-off events. [2024-02-07 19:18:59,511 INFO L125 PetriNetUnfolderBase]: For 62288/62364 co-relation queries the response was YES. [2024-02-07 19:18:59,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116935 conditions, 35401 events. 26033/35401 cut-off events. For 62288/62364 co-relation queries the response was YES. Maximal size of possible extension queue 1285. Compared 203702 event pairs, 8430 based on Foata normal form. 420/35075 useless extension candidates. Maximal degree in co-relation 40060. Up to 17804 conditions per place. [2024-02-07 19:18:59,679 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 96 selfloop transitions, 12 changer transitions 0/113 dead transitions. [2024-02-07 19:18:59,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 113 transitions, 761 flow [2024-02-07 19:18:59,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:18:59,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:18:59,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-02-07 19:18:59,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6542553191489362 [2024-02-07 19:18:59,680 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 312 flow. Second operand 4 states and 123 transitions. [2024-02-07 19:18:59,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 113 transitions, 761 flow [2024-02-07 19:18:59,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 113 transitions, 731 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 19:18:59,779 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 360 flow [2024-02-07 19:18:59,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=360, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2024-02-07 19:18:59,783 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2024-02-07 19:18:59,783 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 360 flow [2024-02-07 19:18:59,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:18:59,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:59,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:18:59,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 19:18:59,784 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 19:18:59,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:59,784 INFO L85 PathProgramCache]: Analyzing trace with hash 655337637, now seen corresponding path program 3 times [2024-02-07 19:18:59,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:59,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828478144] [2024-02-07 19:18:59,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:59,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:18:59,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:59,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828478144] [2024-02-07 19:18:59,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828478144] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:18:59,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:18:59,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 19:18:59,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524990093] [2024-02-07 19:18:59,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:18:59,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 19:18:59,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:59,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 19:18:59,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-02-07 19:18:59,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 19:18:59,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 360 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:18:59,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:59,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 19:18:59,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:19:02,377 INFO L124 PetriNetUnfolderBase]: 31647/42697 cut-off events. [2024-02-07 19:19:02,377 INFO L125 PetriNetUnfolderBase]: For 102719/102741 co-relation queries the response was YES. [2024-02-07 19:19:02,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149989 conditions, 42697 events. 31647/42697 cut-off events. For 102719/102741 co-relation queries the response was YES. Maximal size of possible extension queue 1563. Compared 248094 event pairs, 9769 based on Foata normal form. 216/41961 useless extension candidates. Maximal degree in co-relation 62222. Up to 23942 conditions per place. [2024-02-07 19:19:02,592 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 118 selfloop transitions, 19 changer transitions 4/146 dead transitions. [2024-02-07 19:19:02,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 146 transitions, 1221 flow [2024-02-07 19:19:02,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:19:02,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:19:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-02-07 19:19:02,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-02-07 19:19:02,594 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 360 flow. Second operand 5 states and 141 transitions. [2024-02-07 19:19:02,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 146 transitions, 1221 flow [2024-02-07 19:19:02,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 146 transitions, 1113 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-02-07 19:19:02,633 INFO L231 Difference]: Finished difference. Result has 67 places, 73 transitions, 456 flow [2024-02-07 19:19:02,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=456, PETRI_PLACES=67, PETRI_TRANSITIONS=73} [2024-02-07 19:19:02,634 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-02-07 19:19:02,635 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 73 transitions, 456 flow [2024-02-07 19:19:02,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:19:02,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:19:02,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:19:02,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 19:19:02,635 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 19:19:02,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:19:02,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1385837083, now seen corresponding path program 3 times [2024-02-07 19:19:02,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:19:02,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786656836] [2024-02-07 19:19:02,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:19:02,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:19:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:19:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:19:02,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:19:02,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786656836] [2024-02-07 19:19:02,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786656836] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:19:02,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:19:02,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:19:02,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570497720] [2024-02-07 19:19:02,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:19:02,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:19:02,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:19:02,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:19:02,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:19:02,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 19:19:02,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 73 transitions, 456 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:19:02,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:19:02,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 19:19:02,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:19:06,024 INFO L124 PetriNetUnfolderBase]: 38206/51870 cut-off events. [2024-02-07 19:19:06,024 INFO L125 PetriNetUnfolderBase]: For 136860/136998 co-relation queries the response was YES. [2024-02-07 19:19:06,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196818 conditions, 51870 events. 38206/51870 cut-off events. For 136860/136998 co-relation queries the response was YES. Maximal size of possible extension queue 2014. Compared 313764 event pairs, 10264 based on Foata normal form. 1012/51654 useless extension candidates. Maximal degree in co-relation 75274. Up to 35379 conditions per place. [2024-02-07 19:19:06,421 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 102 selfloop transitions, 11 changer transitions 16/134 dead transitions. [2024-02-07 19:19:06,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 134 transitions, 1065 flow [2024-02-07 19:19:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:19:06,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:19:06,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-02-07 19:19:06,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6436170212765957 [2024-02-07 19:19:06,423 INFO L175 Difference]: Start difference. First operand has 67 places, 73 transitions, 456 flow. Second operand 4 states and 121 transitions. [2024-02-07 19:19:06,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 134 transitions, 1065 flow [2024-02-07 19:19:06,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 134 transitions, 1036 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:19:06,490 INFO L231 Difference]: Finished difference. Result has 71 places, 80 transitions, 551 flow [2024-02-07 19:19:06,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=551, PETRI_PLACES=71, PETRI_TRANSITIONS=80} [2024-02-07 19:19:06,492 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 20 predicate places. [2024-02-07 19:19:06,492 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 80 transitions, 551 flow [2024-02-07 19:19:06,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:19:06,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:19:06,492 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:19:06,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 19:19:06,493 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 19:19:06,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:19:06,493 INFO L85 PathProgramCache]: Analyzing trace with hash -583640541, now seen corresponding path program 4 times [2024-02-07 19:19:06,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:19:06,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452580198] [2024-02-07 19:19:06,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:19:06,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:19:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:19:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:19:06,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:19:06,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452580198] [2024-02-07 19:19:06,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452580198] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:19:06,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:19:06,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 19:19:06,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749025836] [2024-02-07 19:19:06,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:19:06,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 19:19:06,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:19:06,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 19:19:06,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-07 19:19:06,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 19:19:06,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 551 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:19:06,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:19:06,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 19:19:06,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:19:10,913 INFO L124 PetriNetUnfolderBase]: 49779/67961 cut-off events. [2024-02-07 19:19:10,913 INFO L125 PetriNetUnfolderBase]: For 199137/199316 co-relation queries the response was YES. [2024-02-07 19:19:11,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257952 conditions, 67961 events. 49779/67961 cut-off events. For 199137/199316 co-relation queries the response was YES. Maximal size of possible extension queue 2464. Compared 426415 event pairs, 19807 based on Foata normal form. 288/66573 useless extension candidates. Maximal degree in co-relation 102488. Up to 41231 conditions per place. [2024-02-07 19:19:11,310 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 147 selfloop transitions, 23 changer transitions 4/179 dead transitions. [2024-02-07 19:19:11,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 179 transitions, 1636 flow [2024-02-07 19:19:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:19:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:19:11,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-02-07 19:19:11,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-02-07 19:19:11,311 INFO L175 Difference]: Start difference. First operand has 71 places, 80 transitions, 551 flow. Second operand 5 states and 141 transitions. [2024-02-07 19:19:11,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 179 transitions, 1636 flow [2024-02-07 19:19:11,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 179 transitions, 1625 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:19:11,369 INFO L231 Difference]: Finished difference. Result has 77 places, 99 transitions, 828 flow [2024-02-07 19:19:11,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=828, PETRI_PLACES=77, PETRI_TRANSITIONS=99} [2024-02-07 19:19:11,370 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 26 predicate places. [2024-02-07 19:19:11,370 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 99 transitions, 828 flow [2024-02-07 19:19:11,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:19:11,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:19:11,370 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:19:11,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-07 19:19:11,371 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 19:19:11,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:19:11,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1818774739, now seen corresponding path program 4 times [2024-02-07 19:19:11,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:19:11,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752921354] [2024-02-07 19:19:11,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:19:11,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:19:11,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:19:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:19:11,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:19:11,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752921354] [2024-02-07 19:19:11,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752921354] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:19:11,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:19:11,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:19:11,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069739614] [2024-02-07 19:19:11,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:19:11,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:19:11,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:19:11,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:19:11,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:19:11,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 19:19:11,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 99 transitions, 828 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:19:11,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:19:11,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 19:19:11,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:19:16,014 INFO L124 PetriNetUnfolderBase]: 49334/66770 cut-off events. [2024-02-07 19:19:16,015 INFO L125 PetriNetUnfolderBase]: For 302478/302582 co-relation queries the response was YES. [2024-02-07 19:19:16,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286043 conditions, 66770 events. 49334/66770 cut-off events. For 302478/302582 co-relation queries the response was YES. Maximal size of possible extension queue 2396. Compared 410750 event pairs, 14988 based on Foata normal form. 1174/65910 useless extension candidates. Maximal degree in co-relation 230082. Up to 30978 conditions per place. [2024-02-07 19:19:16,448 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 99 selfloop transitions, 37 changer transitions 13/154 dead transitions. [2024-02-07 19:19:16,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 154 transitions, 1487 flow [2024-02-07 19:19:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:19:16,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:19:16,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-02-07 19:19:16,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-02-07 19:19:16,450 INFO L175 Difference]: Start difference. First operand has 77 places, 99 transitions, 828 flow. Second operand 4 states and 120 transitions. [2024-02-07 19:19:16,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 154 transitions, 1487 flow [2024-02-07 19:19:16,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 154 transitions, 1467 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-02-07 19:19:16,713 INFO L231 Difference]: Finished difference. Result has 81 places, 97 transitions, 909 flow [2024-02-07 19:19:16,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=909, PETRI_PLACES=81, PETRI_TRANSITIONS=97} [2024-02-07 19:19:16,714 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 30 predicate places. [2024-02-07 19:19:16,714 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 97 transitions, 909 flow [2024-02-07 19:19:16,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:19:16,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:19:16,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:19:16,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-07 19:19:16,715 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 19:19:16,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:19:16,715 INFO L85 PathProgramCache]: Analyzing trace with hash 525357963, now seen corresponding path program 5 times [2024-02-07 19:19:16,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:19:16,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26561317] [2024-02-07 19:19:16,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:19:16,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:19:16,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:19:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:19:16,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:19:16,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26561317] [2024-02-07 19:19:16,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26561317] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:19:16,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:19:16,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:19:16,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094016811] [2024-02-07 19:19:16,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:19:16,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:19:16,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:19:16,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:19:16,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:19:16,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 19:19:16,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 97 transitions, 909 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:19:16,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:19:16,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 19:19:16,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:19:21,131 INFO L124 PetriNetUnfolderBase]: 48311/65014 cut-off events. [2024-02-07 19:19:21,131 INFO L125 PetriNetUnfolderBase]: For 353143/353311 co-relation queries the response was YES. [2024-02-07 19:19:21,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295846 conditions, 65014 events. 48311/65014 cut-off events. For 353143/353311 co-relation queries the response was YES. Maximal size of possible extension queue 2389. Compared 393457 event pairs, 13502 based on Foata normal form. 1230/64419 useless extension candidates. Maximal degree in co-relation 224088. Up to 32366 conditions per place. [2024-02-07 19:19:21,585 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 156 selfloop transitions, 23 changer transitions 2/186 dead transitions. [2024-02-07 19:19:21,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 186 transitions, 2143 flow [2024-02-07 19:19:21,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:19:21,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:19:21,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-02-07 19:19:21,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6329787234042553 [2024-02-07 19:19:21,587 INFO L175 Difference]: Start difference. First operand has 81 places, 97 transitions, 909 flow. Second operand 4 states and 119 transitions. [2024-02-07 19:19:21,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 186 transitions, 2143 flow [2024-02-07 19:19:21,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 186 transitions, 2036 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-02-07 19:19:21,719 INFO L231 Difference]: Finished difference. Result has 83 places, 103 transitions, 1077 flow [2024-02-07 19:19:21,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1077, PETRI_PLACES=83, PETRI_TRANSITIONS=103} [2024-02-07 19:19:21,720 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 32 predicate places. [2024-02-07 19:19:21,720 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 103 transitions, 1077 flow [2024-02-07 19:19:21,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:19:21,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:19:21,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:19:21,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-07 19:19:21,721 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 19:19:21,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:19:21,721 INFO L85 PathProgramCache]: Analyzing trace with hash 894608354, now seen corresponding path program 1 times [2024-02-07 19:19:21,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:19:21,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400125212] [2024-02-07 19:19:21,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:19:21,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:19:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:19:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:19:21,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:19:21,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400125212] [2024-02-07 19:19:21,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400125212] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:19:21,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635798216] [2024-02-07 19:19:21,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:19:21,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:19:21,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:19:21,813 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:19:21,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 19:19:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:19:22,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 19:19:22,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:19:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:19:22,309 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 19:19:22,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635798216] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:19:22,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 19:19:22,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-02-07 19:19:22,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850726524] [2024-02-07 19:19:22,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:19:22,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 19:19:22,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:19:22,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 19:19:22,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:19:22,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 19:19:22,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 103 transitions, 1077 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:19:22,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:19:22,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 19:19:22,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand