./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/mutex-meet/triangular-longer-1.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i ./goblint.2024-05-07_14-17-48.files/mutex-meet/triangular-longer-1.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 10:32:37,602 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 10:32:37,663 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 10:32:37,670 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 10:32:37,670 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 10:32:37,695 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 10:32:37,699 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 10:32:37,699 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 10:32:37,700 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 10:32:37,703 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 10:32:37,703 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 10:32:37,703 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 10:32:37,704 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 10:32:37,705 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 10:32:37,705 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 10:32:37,706 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 10:32:37,706 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 10:32:37,706 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 10:32:37,706 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 10:32:37,706 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 10:32:37,706 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 10:32:37,707 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 10:32:37,707 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 10:32:37,707 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 10:32:37,707 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 10:32:37,708 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 10:32:37,708 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 10:32:37,708 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 10:32:37,709 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 10:32:37,709 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 10:32:37,710 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 10:32:37,710 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 10:32:37,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:32:37,710 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 10:32:37,710 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 10:32:37,710 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 10:32:37,711 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 10:32:37,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 10:32:37,711 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 10:32:37,711 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 10:32:37,711 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 10:32:37,712 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 10:32:37,712 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 10:32:37,712 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 10:32:37,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 10:32:37,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 10:32:37,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 10:32:37,961 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 10:32:37,961 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 10:32:37,962 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/triangular-longer-1.yml/witness.yml [2024-05-12 10:32:38,044 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 10:32:38,045 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 10:32:38,047 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2024-05-12 10:32:39,185 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 10:32:39,382 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 10:32:39,382 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2024-05-12 10:32:39,394 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55134016b/b42d00dc844741c18efaa221d31aa18b/FLAG1d09d11b8 [2024-05-12 10:32:39,407 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55134016b/b42d00dc844741c18efaa221d31aa18b [2024-05-12 10:32:39,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 10:32:39,409 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 10:32:39,412 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 10:32:39,412 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 10:32:39,416 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 10:32:39,417 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:32:38" (1/2) ... [2024-05-12 10:32:39,417 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@651abcd0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:32:39, skipping insertion in model container [2024-05-12 10:32:39,417 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:32:38" (1/2) ... [2024-05-12 10:32:39,420 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@793ef332 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:32:39, skipping insertion in model container [2024-05-12 10:32:39,420 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:32:39" (2/2) ... [2024-05-12 10:32:39,420 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@651abcd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:32:39, skipping insertion in model container [2024-05-12 10:32:39,421 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:32:39" (2/2) ... [2024-05-12 10:32:39,421 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 10:32:39,446 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 10:32:39,447 INFO L97 edCorrectnessWitness]: Location invariant before [L714-L714] (((! multithreaded || ((((0 <= j && 4 <= j) && j % 2 == 0) && j != 0) && j != 1)) && (! multithreaded || ((-7LL + (long long )i) + (long long )j >= 0LL && (1LL - (long long )i) + (long long )j >= 0LL))) && (! multithreaded || ((((((((0 <= i && 0 <= j) && 3 <= i) && 4 <= j) && i % 2 == 1) && j % 2 == 0) && i != 0) && j != 0) && j != 1))) && (! multithreaded || (((0 <= i && 3 <= i) && i % 2 == 1) && i != 0)) [2024-05-12 10:32:39,447 INFO L97 edCorrectnessWitness]: Location invariant before [L715-L715] (((! multithreaded || ((((0 <= j && 4 <= j) && j % 2 == 0) && j != 0) && j != 1)) && (! multithreaded || ((-7LL + (long long )i) + (long long )j >= 0LL && (1LL - (long long )i) + (long long )j >= 0LL))) && (! multithreaded || ((((((((0 <= i && 0 <= j) && 3 <= i) && 4 <= j) && i % 2 == 1) && j % 2 == 0) && i != 0) && j != 0) && j != 1))) && (! multithreaded || (((0 <= i && 3 <= i) && i % 2 == 1) && i != 0)) [2024-05-12 10:32:39,447 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 10:32:39,447 INFO L106 edCorrectnessWitness]: ghost_update [L713-L713] multithreaded = 1; [2024-05-12 10:32:39,484 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 10:32:39,777 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2024-05-12 10:32:39,784 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:32:39,791 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 10:32:39,889 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2024-05-12 10:32:39,895 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:32:39,931 INFO L206 MainTranslator]: Completed translation [2024-05-12 10:32:39,932 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:32:39 WrapperNode [2024-05-12 10:32:39,932 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 10:32:39,933 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 10:32:39,933 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 10:32:39,933 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 10:32:39,939 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:32:39" (1/1) ... [2024-05-12 10:32:39,964 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:32:39" (1/1) ... [2024-05-12 10:32:39,994 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 50 [2024-05-12 10:32:39,995 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 10:32:39,996 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 10:32:39,996 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 10:32:39,996 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 10:32:40,005 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:32:39" (1/1) ... [2024-05-12 10:32:40,006 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:32:39" (1/1) ... [2024-05-12 10:32:40,012 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:32:39" (1/1) ... [2024-05-12 10:32:40,036 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-05-12 10:32:40,037 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:32:39" (1/1) ... [2024-05-12 10:32:40,037 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:32:39" (1/1) ... [2024-05-12 10:32:40,049 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:32:39" (1/1) ... [2024-05-12 10:32:40,052 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:32:39" (1/1) ... [2024-05-12 10:32:40,056 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:32:39" (1/1) ... [2024-05-12 10:32:40,057 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:32:39" (1/1) ... [2024-05-12 10:32:40,062 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 10:32:40,065 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 10:32:40,065 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 10:32:40,065 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 10:32:40,066 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:32:39" (1/1) ... [2024-05-12 10:32:40,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:32:40,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:32:40,106 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-05-12 10:32:40,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-05-12 10:32:40,182 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-05-12 10:32:40,182 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-05-12 10:32:40,182 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-05-12 10:32:40,182 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-05-12 10:32:40,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 10:32:40,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 10:32:40,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 10:32:40,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 10:32:40,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 10:32:40,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 10:32:40,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 10:32:40,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 10:32:40,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 10:32:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 10:32:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 10:32:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 10:32:40,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 10:32:40,187 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 10:32:40,316 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 10:32:40,318 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 10:32:40,515 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 10:32:40,515 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 10:32:40,623 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 10:32:40,623 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-05-12 10:32:40,623 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:32:40 BoogieIcfgContainer [2024-05-12 10:32:40,623 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 10:32:40,625 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 10:32:40,625 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 10:32:40,627 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 10:32:40,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:32:38" (1/4) ... [2024-05-12 10:32:40,628 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22fd2be0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:32:40, skipping insertion in model container [2024-05-12 10:32:40,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 10:32:39" (2/4) ... [2024-05-12 10:32:40,628 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22fd2be0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:32:40, skipping insertion in model container [2024-05-12 10:32:40,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:32:39" (3/4) ... [2024-05-12 10:32:40,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22fd2be0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:32:40, skipping insertion in model container [2024-05-12 10:32:40,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:32:40" (4/4) ... [2024-05-12 10:32:40,630 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2024-05-12 10:32:40,643 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 10:32:40,644 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-05-12 10:32:40,644 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 10:32:40,668 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 10:32:40,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 30 transitions, 68 flow [2024-05-12 10:32:40,708 INFO L124 PetriNetUnfolderBase]: 3/28 cut-off events. [2024-05-12 10:32:40,708 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:32:40,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 28 events. 3/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-05-12 10:32:40,711 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 30 transitions, 68 flow [2024-05-12 10:32:40,713 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 28 transitions, 62 flow [2024-05-12 10:32:40,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 10:32:40,725 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;@7d170183, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 10:32:40,725 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-05-12 10:32:40,728 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 10:32:40,728 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 10:32:40,728 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:32:40,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:40,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 10:32:40,729 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:32:40,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:40,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1410544718, now seen corresponding path program 1 times [2024-05-12 10:32:40,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:40,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217755362] [2024-05-12 10:32:40,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:40,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:40,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:41,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:41,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:41,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217755362] [2024-05-12 10:32:41,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217755362] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:32:41,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:32:41,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 10:32:41,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997942536] [2024-05-12 10:32:41,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:32:41,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 10:32:41,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:41,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 10:32:41,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 10:32:41,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-05-12 10:32:41,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:41,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:41,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-05-12 10:32:41,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:41,537 INFO L124 PetriNetUnfolderBase]: 172/327 cut-off events. [2024-05-12 10:32:41,538 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-05-12 10:32:41,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 327 events. 172/327 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1306 event pairs, 54 based on Foata normal form. 20/327 useless extension candidates. Maximal degree in co-relation 614. Up to 211 conditions per place. [2024-05-12 10:32:41,542 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 25 selfloop transitions, 3 changer transitions 2/38 dead transitions. [2024-05-12 10:32:41,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 38 transitions, 145 flow [2024-05-12 10:32:41,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 10:32:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 10:32:41,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-05-12 10:32:41,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-05-12 10:32:41,558 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 62 flow. Second operand 3 states and 64 transitions. [2024-05-12 10:32:41,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 38 transitions, 145 flow [2024-05-12 10:32:41,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 142 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 10:32:41,563 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 77 flow [2024-05-12 10:32:41,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2024-05-12 10:32:41,568 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2024-05-12 10:32:41,569 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 77 flow [2024-05-12 10:32:41,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:41,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:41,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:41,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 10:32:41,570 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:32:41,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:41,571 INFO L85 PathProgramCache]: Analyzing trace with hash -421416505, now seen corresponding path program 1 times [2024-05-12 10:32:41,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:41,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171575766] [2024-05-12 10:32:41,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:41,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:41,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:41,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171575766] [2024-05-12 10:32:41,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171575766] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:32:41,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:32:41,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:32:41,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929738460] [2024-05-12 10:32:41,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:32:41,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:32:41,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:41,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:32:41,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:32:41,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-05-12 10:32:41,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 77 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:41,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:41,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-05-12 10:32:41,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:41,895 INFO L124 PetriNetUnfolderBase]: 160/318 cut-off events. [2024-05-12 10:32:41,895 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-05-12 10:32:41,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 698 conditions, 318 events. 160/318 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1260 event pairs, 37 based on Foata normal form. 21/335 useless extension candidates. Maximal degree in co-relation 683. Up to 103 conditions per place. [2024-05-12 10:32:41,897 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 36 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2024-05-12 10:32:41,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 48 transitions, 205 flow [2024-05-12 10:32:41,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:32:41,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:32:41,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-05-12 10:32:41,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-05-12 10:32:41,899 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 77 flow. Second operand 5 states and 93 transitions. [2024-05-12 10:32:41,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 48 transitions, 205 flow [2024-05-12 10:32:41,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 48 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 10:32:41,901 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 91 flow [2024-05-12 10:32:41,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2024-05-12 10:32:41,901 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2024-05-12 10:32:41,902 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 91 flow [2024-05-12 10:32:41,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:41,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:41,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:41,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 10:32:41,902 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:32:41,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:41,903 INFO L85 PathProgramCache]: Analyzing trace with hash 280436029, now seen corresponding path program 1 times [2024-05-12 10:32:41,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:41,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404979269] [2024-05-12 10:32:41,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:41,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:42,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:42,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404979269] [2024-05-12 10:32:42,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404979269] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:32:42,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:32:42,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:32:42,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648322663] [2024-05-12 10:32:42,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:32:42,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:32:42,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:42,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:32:42,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:32:42,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 30 [2024-05-12 10:32:42,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:42,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:42,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 30 [2024-05-12 10:32:42,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:42,166 INFO L124 PetriNetUnfolderBase]: 262/519 cut-off events. [2024-05-12 10:32:42,167 INFO L125 PetriNetUnfolderBase]: For 337/337 co-relation queries the response was YES. [2024-05-12 10:32:42,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 519 events. 262/519 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2395 event pairs, 94 based on Foata normal form. 9/515 useless extension candidates. Maximal degree in co-relation 1148. Up to 283 conditions per place. [2024-05-12 10:32:42,173 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 28 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2024-05-12 10:32:42,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 39 transitions, 185 flow [2024-05-12 10:32:42,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:32:42,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:32:42,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2024-05-12 10:32:42,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-05-12 10:32:42,176 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 91 flow. Second operand 4 states and 66 transitions. [2024-05-12 10:32:42,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 39 transitions, 185 flow [2024-05-12 10:32:42,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 39 transitions, 180 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 10:32:42,182 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 105 flow [2024-05-12 10:32:42,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2024-05-12 10:32:42,183 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2024-05-12 10:32:42,183 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 105 flow [2024-05-12 10:32:42,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:42,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:42,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:42,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 10:32:42,185 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:32:42,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:42,185 INFO L85 PathProgramCache]: Analyzing trace with hash 77939701, now seen corresponding path program 1 times [2024-05-12 10:32:42,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:42,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380425114] [2024-05-12 10:32:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:42,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:42,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:42,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380425114] [2024-05-12 10:32:42,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380425114] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:32:42,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:32:42,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:32:42,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967497673] [2024-05-12 10:32:42,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:32:42,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:32:42,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:42,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:32:42,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:32:42,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 10:32:42,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:42,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:42,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 10:32:42,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:42,486 INFO L124 PetriNetUnfolderBase]: 607/1057 cut-off events. [2024-05-12 10:32:42,487 INFO L125 PetriNetUnfolderBase]: For 742/750 co-relation queries the response was YES. [2024-05-12 10:32:42,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2565 conditions, 1057 events. 607/1057 cut-off events. For 742/750 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5020 event pairs, 168 based on Foata normal form. 0/1012 useless extension candidates. Maximal degree in co-relation 2545. Up to 562 conditions per place. [2024-05-12 10:32:42,492 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 35 selfloop transitions, 7 changer transitions 30/77 dead transitions. [2024-05-12 10:32:42,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 77 transitions, 404 flow [2024-05-12 10:32:42,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:32:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:32:42,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-05-12 10:32:42,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-05-12 10:32:42,493 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 105 flow. Second operand 8 states and 135 transitions. [2024-05-12 10:32:42,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 77 transitions, 404 flow [2024-05-12 10:32:42,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 77 transitions, 396 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 10:32:42,496 INFO L231 Difference]: Finished difference. Result has 49 places, 32 transitions, 159 flow [2024-05-12 10:32:42,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=159, PETRI_PLACES=49, PETRI_TRANSITIONS=32} [2024-05-12 10:32:42,497 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2024-05-12 10:32:42,497 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 32 transitions, 159 flow [2024-05-12 10:32:42,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:42,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:42,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:42,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 10:32:42,498 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:32:42,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:42,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1079780034, now seen corresponding path program 1 times [2024-05-12 10:32:42,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:42,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930049712] [2024-05-12 10:32:42,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:42,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:42,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:42,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930049712] [2024-05-12 10:32:42,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930049712] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:32:42,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:32:42,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:32:42,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089903662] [2024-05-12 10:32:42,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:32:42,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:32:42,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:42,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:32:42,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:32:42,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-05-12 10:32:42,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 32 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:42,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:42,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-05-12 10:32:42,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:42,770 INFO L124 PetriNetUnfolderBase]: 318/648 cut-off events. [2024-05-12 10:32:42,771 INFO L125 PetriNetUnfolderBase]: For 922/928 co-relation queries the response was YES. [2024-05-12 10:32:42,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1709 conditions, 648 events. 318/648 cut-off events. For 922/928 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2962 event pairs, 78 based on Foata normal form. 18/659 useless extension candidates. Maximal degree in co-relation 1683. Up to 296 conditions per place. [2024-05-12 10:32:42,774 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 43 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2024-05-12 10:32:42,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 59 transitions, 337 flow [2024-05-12 10:32:42,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:32:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:32:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-05-12 10:32:42,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-05-12 10:32:42,776 INFO L175 Difference]: Start difference. First operand has 49 places, 32 transitions, 159 flow. Second operand 6 states and 109 transitions. [2024-05-12 10:32:42,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 59 transitions, 337 flow [2024-05-12 10:32:42,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 323 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-05-12 10:32:42,779 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 185 flow [2024-05-12 10:32:42,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=185, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2024-05-12 10:32:42,779 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2024-05-12 10:32:42,780 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 185 flow [2024-05-12 10:32:42,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:42,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:42,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:42,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 10:32:42,780 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:32:42,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:42,781 INFO L85 PathProgramCache]: Analyzing trace with hash -970436520, now seen corresponding path program 1 times [2024-05-12 10:32:42,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:42,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044190367] [2024-05-12 10:32:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:42,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:42,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:42,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044190367] [2024-05-12 10:32:42,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044190367] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:32:42,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:32:42,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:32:42,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429491558] [2024-05-12 10:32:42,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:32:42,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:32:42,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:42,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:32:42,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:32:42,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 10:32:42,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 185 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:42,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:42,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 10:32:42,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:43,038 INFO L124 PetriNetUnfolderBase]: 562/1014 cut-off events. [2024-05-12 10:32:43,038 INFO L125 PetriNetUnfolderBase]: For 1716/1732 co-relation queries the response was YES. [2024-05-12 10:32:43,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2929 conditions, 1014 events. 562/1014 cut-off events. For 1716/1732 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4680 event pairs, 229 based on Foata normal form. 18/1019 useless extension candidates. Maximal degree in co-relation 2903. Up to 670 conditions per place. [2024-05-12 10:32:43,044 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 33 selfloop transitions, 8 changer transitions 15/61 dead transitions. [2024-05-12 10:32:43,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 407 flow [2024-05-12 10:32:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:32:43,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:32:43,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-05-12 10:32:43,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388888888888889 [2024-05-12 10:32:43,045 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 185 flow. Second operand 6 states and 97 transitions. [2024-05-12 10:32:43,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 407 flow [2024-05-12 10:32:43,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 388 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-05-12 10:32:43,049 INFO L231 Difference]: Finished difference. Result has 55 places, 36 transitions, 218 flow [2024-05-12 10:32:43,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=218, PETRI_PLACES=55, PETRI_TRANSITIONS=36} [2024-05-12 10:32:43,050 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 23 predicate places. [2024-05-12 10:32:43,050 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 36 transitions, 218 flow [2024-05-12 10:32:43,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:43,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:43,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:43,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 10:32:43,050 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:32:43,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:43,051 INFO L85 PathProgramCache]: Analyzing trace with hash -2024798661, now seen corresponding path program 1 times [2024-05-12 10:32:43,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:43,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846662733] [2024-05-12 10:32:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:43,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:43,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:43,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846662733] [2024-05-12 10:32:43,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846662733] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:32:43,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:32:43,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:32:43,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46263660] [2024-05-12 10:32:43,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:32:43,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:32:43,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:43,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:32:43,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:32:43,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 10:32:43,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 36 transitions, 218 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:43,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:43,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 10:32:43,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:43,302 INFO L124 PetriNetUnfolderBase]: 661/1206 cut-off events. [2024-05-12 10:32:43,302 INFO L125 PetriNetUnfolderBase]: For 2613/2629 co-relation queries the response was YES. [2024-05-12 10:32:43,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3713 conditions, 1206 events. 661/1206 cut-off events. For 2613/2629 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5887 event pairs, 208 based on Foata normal form. 36/1233 useless extension candidates. Maximal degree in co-relation 3683. Up to 667 conditions per place. [2024-05-12 10:32:43,309 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 53 selfloop transitions, 11 changer transitions 21/90 dead transitions. [2024-05-12 10:32:43,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 90 transitions, 623 flow [2024-05-12 10:32:43,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:32:43,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:32:43,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-05-12 10:32:43,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481481481481482 [2024-05-12 10:32:43,311 INFO L175 Difference]: Start difference. First operand has 55 places, 36 transitions, 218 flow. Second operand 9 states and 148 transitions. [2024-05-12 10:32:43,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 90 transitions, 623 flow [2024-05-12 10:32:43,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 90 transitions, 576 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-05-12 10:32:43,319 INFO L231 Difference]: Finished difference. Result has 63 places, 41 transitions, 291 flow [2024-05-12 10:32:43,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=291, PETRI_PLACES=63, PETRI_TRANSITIONS=41} [2024-05-12 10:32:43,320 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 31 predicate places. [2024-05-12 10:32:43,320 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 41 transitions, 291 flow [2024-05-12 10:32:43,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:43,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:43,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:43,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 10:32:43,321 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:32:43,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:43,322 INFO L85 PathProgramCache]: Analyzing trace with hash 2039593339, now seen corresponding path program 2 times [2024-05-12 10:32:43,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:43,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295738930] [2024-05-12 10:32:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:43,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:43,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:43,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295738930] [2024-05-12 10:32:43,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295738930] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:32:43,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:32:43,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:32:43,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506604727] [2024-05-12 10:32:43,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:32:43,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:32:43,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:43,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:32:43,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:32:43,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 10:32:43,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 41 transitions, 291 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:43,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:43,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 10:32:43,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:43,579 INFO L124 PetriNetUnfolderBase]: 598/1101 cut-off events. [2024-05-12 10:32:43,580 INFO L125 PetriNetUnfolderBase]: For 3179/3195 co-relation queries the response was YES. [2024-05-12 10:32:43,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3608 conditions, 1101 events. 598/1101 cut-off events. For 3179/3195 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5273 event pairs, 208 based on Foata normal form. 54/1146 useless extension candidates. Maximal degree in co-relation 3574. Up to 637 conditions per place. [2024-05-12 10:32:43,586 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 43 selfloop transitions, 11 changer transitions 28/87 dead transitions. [2024-05-12 10:32:43,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 87 transitions, 679 flow [2024-05-12 10:32:43,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:32:43,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:32:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-05-12 10:32:43,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5458333333333333 [2024-05-12 10:32:43,590 INFO L175 Difference]: Start difference. First operand has 63 places, 41 transitions, 291 flow. Second operand 8 states and 131 transitions. [2024-05-12 10:32:43,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 87 transitions, 679 flow [2024-05-12 10:32:43,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 87 transitions, 653 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-05-12 10:32:43,597 INFO L231 Difference]: Finished difference. Result has 69 places, 42 transitions, 334 flow [2024-05-12 10:32:43,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=334, PETRI_PLACES=69, PETRI_TRANSITIONS=42} [2024-05-12 10:32:43,598 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 37 predicate places. [2024-05-12 10:32:43,598 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 42 transitions, 334 flow [2024-05-12 10:32:43,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:43,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:43,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:43,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 10:32:43,599 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:32:43,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:43,599 INFO L85 PathProgramCache]: Analyzing trace with hash -945010014, now seen corresponding path program 1 times [2024-05-12 10:32:43,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:43,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872489046] [2024-05-12 10:32:43,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:43,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:43,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:43,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872489046] [2024-05-12 10:32:43,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872489046] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:32:43,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:32:43,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:32:43,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362950184] [2024-05-12 10:32:43,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:32:43,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:32:43,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:43,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:32:43,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:32:43,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 10:32:43,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 42 transitions, 334 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:43,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:43,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 10:32:43,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:43,933 INFO L124 PetriNetUnfolderBase]: 724/1320 cut-off events. [2024-05-12 10:32:43,933 INFO L125 PetriNetUnfolderBase]: For 4768/4784 co-relation queries the response was YES. [2024-05-12 10:32:43,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4509 conditions, 1320 events. 724/1320 cut-off events. For 4768/4784 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6577 event pairs, 161 based on Foata normal form. 27/1334 useless extension candidates. Maximal degree in co-relation 4471. Up to 577 conditions per place. [2024-05-12 10:32:43,943 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 58 selfloop transitions, 20 changer transitions 23/106 dead transitions. [2024-05-12 10:32:43,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 106 transitions, 832 flow [2024-05-12 10:32:43,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:32:43,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:32:43,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-05-12 10:32:43,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-05-12 10:32:43,945 INFO L175 Difference]: Start difference. First operand has 69 places, 42 transitions, 334 flow. Second operand 11 states and 177 transitions. [2024-05-12 10:32:43,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 106 transitions, 832 flow [2024-05-12 10:32:43,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 106 transitions, 767 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-05-12 10:32:43,956 INFO L231 Difference]: Finished difference. Result has 76 places, 48 transitions, 438 flow [2024-05-12 10:32:43,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=438, PETRI_PLACES=76, PETRI_TRANSITIONS=48} [2024-05-12 10:32:43,957 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 44 predicate places. [2024-05-12 10:32:43,957 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 48 transitions, 438 flow [2024-05-12 10:32:43,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:43,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:43,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:43,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 10:32:43,959 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:32:43,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:43,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1849717684, now seen corresponding path program 2 times [2024-05-12 10:32:43,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:43,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096138945] [2024-05-12 10:32:43,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:43,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:44,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:44,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096138945] [2024-05-12 10:32:44,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096138945] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:32:44,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:32:44,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:32:44,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348537237] [2024-05-12 10:32:44,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:32:44,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:32:44,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:44,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:32:44,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:32:44,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 10:32:44,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 48 transitions, 438 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:44,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:44,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 10:32:44,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:44,311 INFO L124 PetriNetUnfolderBase]: 697/1281 cut-off events. [2024-05-12 10:32:44,311 INFO L125 PetriNetUnfolderBase]: For 8255/8272 co-relation queries the response was YES. [2024-05-12 10:32:44,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5050 conditions, 1281 events. 697/1281 cut-off events. For 8255/8272 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6306 event pairs, 132 based on Foata normal form. 72/1340 useless extension candidates. Maximal degree in co-relation 5009. Up to 425 conditions per place. [2024-05-12 10:32:44,317 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 48 selfloop transitions, 24 changer transitions 35/112 dead transitions. [2024-05-12 10:32:44,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 112 transitions, 1054 flow [2024-05-12 10:32:44,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:32:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:32:44,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-05-12 10:32:44,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-05-12 10:32:44,318 INFO L175 Difference]: Start difference. First operand has 76 places, 48 transitions, 438 flow. Second operand 11 states and 174 transitions. [2024-05-12 10:32:44,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 112 transitions, 1054 flow [2024-05-12 10:32:44,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 112 transitions, 985 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-05-12 10:32:44,328 INFO L231 Difference]: Finished difference. Result has 85 places, 52 transitions, 531 flow [2024-05-12 10:32:44,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=531, PETRI_PLACES=85, PETRI_TRANSITIONS=52} [2024-05-12 10:32:44,329 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 53 predicate places. [2024-05-12 10:32:44,329 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 52 transitions, 531 flow [2024-05-12 10:32:44,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:44,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:44,329 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:44,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 10:32:44,329 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:32:44,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:44,330 INFO L85 PathProgramCache]: Analyzing trace with hash 654396283, now seen corresponding path program 1 times [2024-05-12 10:32:44,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:44,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773359045] [2024-05-12 10:32:44,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:44,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:44,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:44,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773359045] [2024-05-12 10:32:44,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773359045] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:32:44,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726586543] [2024-05-12 10:32:44,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:44,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:32:44,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:32:44,513 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 10:32:44,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-05-12 10:32:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:44,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2024-05-12 10:32:44,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:32:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:44,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:32:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:44,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726586543] provided 1 perfect and 1 imperfect interpolant sequences [2024-05-12 10:32:44,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-05-12 10:32:44,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 7] total 19 [2024-05-12 10:32:44,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751890385] [2024-05-12 10:32:44,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:32:44,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:32:44,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:44,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:32:44,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2024-05-12 10:32:45,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 30 [2024-05-12 10:32:45,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 52 transitions, 531 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:45,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:45,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 30 [2024-05-12 10:32:45,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:45,150 INFO L124 PetriNetUnfolderBase]: 606/1138 cut-off events. [2024-05-12 10:32:45,150 INFO L125 PetriNetUnfolderBase]: For 10570/10643 co-relation queries the response was YES. [2024-05-12 10:32:45,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4722 conditions, 1138 events. 606/1138 cut-off events. For 10570/10643 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 5573 event pairs, 304 based on Foata normal form. 15/1105 useless extension candidates. Maximal degree in co-relation 4676. Up to 945 conditions per place. [2024-05-12 10:32:45,158 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 41 selfloop transitions, 3 changer transitions 1/56 dead transitions. [2024-05-12 10:32:45,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 56 transitions, 640 flow [2024-05-12 10:32:45,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:32:45,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:32:45,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 58 transitions. [2024-05-12 10:32:45,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-05-12 10:32:45,160 INFO L175 Difference]: Start difference. First operand has 85 places, 52 transitions, 531 flow. Second operand 4 states and 58 transitions. [2024-05-12 10:32:45,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 56 transitions, 640 flow [2024-05-12 10:32:45,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 56 transitions, 574 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-05-12 10:32:45,172 INFO L231 Difference]: Finished difference. Result has 74 places, 51 transitions, 457 flow [2024-05-12 10:32:45,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=457, PETRI_PLACES=74, PETRI_TRANSITIONS=51} [2024-05-12 10:32:45,173 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 42 predicate places. [2024-05-12 10:32:45,173 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 51 transitions, 457 flow [2024-05-12 10:32:45,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:45,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:45,173 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:45,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-05-12 10:32:45,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-05-12 10:32:45,385 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:32:45,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:45,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1405344510, now seen corresponding path program 1 times [2024-05-12 10:32:45,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:45,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185776666] [2024-05-12 10:32:45,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:45,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:45,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:45,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185776666] [2024-05-12 10:32:45,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185776666] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:32:45,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981162417] [2024-05-12 10:32:45,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:45,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:32:45,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:32:45,501 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 10:32:45,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-05-12 10:32:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:45,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2024-05-12 10:32:45,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:32:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:45,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:32:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:45,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981162417] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:32:45,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:32:45,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-05-12 10:32:45,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591216554] [2024-05-12 10:32:45,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:32:45,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-05-12 10:32:45,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:45,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-05-12 10:32:45,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-05-12 10:32:45,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 10:32:45,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 51 transitions, 457 flow. Second operand has 13 states, 13 states have (on average 10.615384615384615) internal successors, (138), 13 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:45,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:45,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 10:32:45,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:46,087 INFO L124 PetriNetUnfolderBase]: 757/1401 cut-off events. [2024-05-12 10:32:46,087 INFO L125 PetriNetUnfolderBase]: For 10985/10985 co-relation queries the response was YES. [2024-05-12 10:32:46,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5798 conditions, 1401 events. 757/1401 cut-off events. For 10985/10985 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 6517 event pairs, 241 based on Foata normal form. 63/1460 useless extension candidates. Maximal degree in co-relation 5756. Up to 781 conditions per place. [2024-05-12 10:32:46,095 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 71 selfloop transitions, 17 changer transitions 67/159 dead transitions. [2024-05-12 10:32:46,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 159 transitions, 1517 flow [2024-05-12 10:32:46,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-05-12 10:32:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-05-12 10:32:46,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 292 transitions. [2024-05-12 10:32:46,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512280701754386 [2024-05-12 10:32:46,125 INFO L175 Difference]: Start difference. First operand has 74 places, 51 transitions, 457 flow. Second operand 19 states and 292 transitions. [2024-05-12 10:32:46,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 159 transitions, 1517 flow [2024-05-12 10:32:46,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 159 transitions, 1463 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-05-12 10:32:46,138 INFO L231 Difference]: Finished difference. Result has 102 places, 57 transitions, 635 flow [2024-05-12 10:32:46,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=635, PETRI_PLACES=102, PETRI_TRANSITIONS=57} [2024-05-12 10:32:46,139 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 70 predicate places. [2024-05-12 10:32:46,140 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 57 transitions, 635 flow [2024-05-12 10:32:46,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.615384615384615) internal successors, (138), 13 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:46,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:46,140 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:46,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-05-12 10:32:46,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-05-12 10:32:46,352 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:32:46,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:46,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1756407554, now seen corresponding path program 2 times [2024-05-12 10:32:46,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:46,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211415753] [2024-05-12 10:32:46,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:46,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:46,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:46,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211415753] [2024-05-12 10:32:46,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211415753] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:32:46,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579085331] [2024-05-12 10:32:46,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 10:32:46,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:32:46,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:32:46,461 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 10:32:46,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-05-12 10:32:46,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 10:32:46,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:32:46,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2024-05-12 10:32:46,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:32:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:46,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:32:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:46,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579085331] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:32:46,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:32:46,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-05-12 10:32:46,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741052026] [2024-05-12 10:32:46,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:32:46,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-05-12 10:32:46,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:46,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-05-12 10:32:46,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-05-12 10:32:46,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 10:32:46,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 57 transitions, 635 flow. Second operand has 13 states, 13 states have (on average 10.615384615384615) internal successors, (138), 13 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:46,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:46,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 10:32:46,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:47,274 INFO L124 PetriNetUnfolderBase]: 964/1773 cut-off events. [2024-05-12 10:32:47,274 INFO L125 PetriNetUnfolderBase]: For 34718/34718 co-relation queries the response was YES. [2024-05-12 10:32:47,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9638 conditions, 1773 events. 964/1773 cut-off events. For 34718/34718 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 8748 event pairs, 88 based on Foata normal form. 72/1841 useless extension candidates. Maximal degree in co-relation 9584. Up to 403 conditions per place. [2024-05-12 10:32:47,286 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 91 selfloop transitions, 47 changer transitions 80/222 dead transitions. [2024-05-12 10:32:47,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 222 transitions, 2651 flow [2024-05-12 10:32:47,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-05-12 10:32:47,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-05-12 10:32:47,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 419 transitions. [2024-05-12 10:32:47,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172839506172839 [2024-05-12 10:32:47,288 INFO L175 Difference]: Start difference. First operand has 102 places, 57 transitions, 635 flow. Second operand 27 states and 419 transitions. [2024-05-12 10:32:47,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 222 transitions, 2651 flow [2024-05-12 10:32:47,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 222 transitions, 2315 flow, removed 157 selfloop flow, removed 11 redundant places. [2024-05-12 10:32:47,321 INFO L231 Difference]: Finished difference. Result has 129 places, 73 transitions, 1034 flow [2024-05-12 10:32:47,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1034, PETRI_PLACES=129, PETRI_TRANSITIONS=73} [2024-05-12 10:32:47,322 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 97 predicate places. [2024-05-12 10:32:47,322 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 73 transitions, 1034 flow [2024-05-12 10:32:47,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.615384615384615) internal successors, (138), 13 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:47,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:47,323 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:47,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-05-12 10:32:47,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:32:47,534 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:32:47,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:47,535 INFO L85 PathProgramCache]: Analyzing trace with hash 6261847, now seen corresponding path program 1 times [2024-05-12 10:32:47,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:47,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325138186] [2024-05-12 10:32:47,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:47,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:47,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:47,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325138186] [2024-05-12 10:32:47,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325138186] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:32:47,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41123382] [2024-05-12 10:32:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:47,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:32:47,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:32:47,648 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 10:32:47,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-05-12 10:32:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:47,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 10:32:47,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:32:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:47,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:32:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:47,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41123382] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:32:47,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:32:47,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-05-12 10:32:47,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302692328] [2024-05-12 10:32:47,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:32:47,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-05-12 10:32:47,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:47,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-05-12 10:32:47,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-05-12 10:32:47,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 10:32:47,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 73 transitions, 1034 flow. Second operand has 15 states, 15 states have (on average 10.466666666666667) internal successors, (157), 15 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:47,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:47,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 10:32:47,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:48,509 INFO L124 PetriNetUnfolderBase]: 1198/2243 cut-off events. [2024-05-12 10:32:48,510 INFO L125 PetriNetUnfolderBase]: For 85440/85440 co-relation queries the response was YES. [2024-05-12 10:32:48,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15248 conditions, 2243 events. 1198/2243 cut-off events. For 85440/85440 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 11892 event pairs, 206 based on Foata normal form. 63/2298 useless extension candidates. Maximal degree in co-relation 15181. Up to 616 conditions per place. [2024-05-12 10:32:48,528 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 101 selfloop transitions, 51 changer transitions 67/223 dead transitions. [2024-05-12 10:32:48,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 223 transitions, 3498 flow [2024-05-12 10:32:48,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-05-12 10:32:48,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-05-12 10:32:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 387 transitions. [2024-05-12 10:32:48,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516 [2024-05-12 10:32:48,531 INFO L175 Difference]: Start difference. First operand has 129 places, 73 transitions, 1034 flow. Second operand 25 states and 387 transitions. [2024-05-12 10:32:48,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 223 transitions, 3498 flow [2024-05-12 10:32:48,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 223 transitions, 2935 flow, removed 261 selfloop flow, removed 17 redundant places. [2024-05-12 10:32:48,598 INFO L231 Difference]: Finished difference. Result has 143 places, 84 transitions, 1311 flow [2024-05-12 10:32:48,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1311, PETRI_PLACES=143, PETRI_TRANSITIONS=84} [2024-05-12 10:32:48,599 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 111 predicate places. [2024-05-12 10:32:48,599 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 84 transitions, 1311 flow [2024-05-12 10:32:48,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.466666666666667) internal successors, (157), 15 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:48,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:48,600 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:48,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-05-12 10:32:48,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:32:48,812 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:32:48,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:48,812 INFO L85 PathProgramCache]: Analyzing trace with hash -407460333, now seen corresponding path program 2 times [2024-05-12 10:32:48,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:48,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793438253] [2024-05-12 10:32:48,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:48,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:48,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:48,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793438253] [2024-05-12 10:32:48,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793438253] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:32:48,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357096543] [2024-05-12 10:32:48,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 10:32:48,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:32:48,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:32:48,935 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 10:32:48,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-05-12 10:32:49,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 10:32:49,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:32:49,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 10:32:49,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:32:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:49,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:32:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:49,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357096543] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:32:49,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:32:49,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-05-12 10:32:49,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326288774] [2024-05-12 10:32:49,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:32:49,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-05-12 10:32:49,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:49,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-05-12 10:32:49,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-05-12 10:32:49,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 10:32:49,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 84 transitions, 1311 flow. Second operand has 15 states, 15 states have (on average 10.533333333333333) internal successors, (158), 15 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:49,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:49,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 10:32:49,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:49,971 INFO L124 PetriNetUnfolderBase]: 1477/2785 cut-off events. [2024-05-12 10:32:49,971 INFO L125 PetriNetUnfolderBase]: For 156127/156127 co-relation queries the response was YES. [2024-05-12 10:32:49,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21056 conditions, 2785 events. 1477/2785 cut-off events. For 156127/156127 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 15255 event pairs, 58 based on Foata normal form. 171/2952 useless extension candidates. Maximal degree in co-relation 20985. Up to 643 conditions per place. [2024-05-12 10:32:49,989 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 95 selfloop transitions, 78 changer transitions 102/279 dead transitions. [2024-05-12 10:32:49,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 279 transitions, 5007 flow [2024-05-12 10:32:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-05-12 10:32:49,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-05-12 10:32:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 463 transitions. [2024-05-12 10:32:49,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144444444444445 [2024-05-12 10:32:49,991 INFO L175 Difference]: Start difference. First operand has 143 places, 84 transitions, 1311 flow. Second operand 30 states and 463 transitions. [2024-05-12 10:32:49,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 279 transitions, 5007 flow [2024-05-12 10:32:50,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 279 transitions, 4262 flow, removed 338 selfloop flow, removed 19 redundant places. [2024-05-12 10:32:50,104 INFO L231 Difference]: Finished difference. Result has 165 places, 105 transitions, 1916 flow [2024-05-12 10:32:50,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1916, PETRI_PLACES=165, PETRI_TRANSITIONS=105} [2024-05-12 10:32:50,105 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 133 predicate places. [2024-05-12 10:32:50,105 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 105 transitions, 1916 flow [2024-05-12 10:32:50,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.533333333333333) internal successors, (158), 15 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:50,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:50,106 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:50,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-05-12 10:32:50,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-05-12 10:32:50,332 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:32:50,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:50,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1114086685, now seen corresponding path program 3 times [2024-05-12 10:32:50,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:50,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514346913] [2024-05-12 10:32:50,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:50,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:50,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:50,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514346913] [2024-05-12 10:32:50,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514346913] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:32:50,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631336551] [2024-05-12 10:32:50,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 10:32:50,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:32:50,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:32:50,479 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 10:32:50,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-05-12 10:32:50,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-05-12 10:32:50,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:32:50,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2024-05-12 10:32:50,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:32:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:50,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:32:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:50,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631336551] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:32:50,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:32:50,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2024-05-12 10:32:50,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933323323] [2024-05-12 10:32:50,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:32:50,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-05-12 10:32:50,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:50,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-05-12 10:32:50,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2024-05-12 10:32:50,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 10:32:50,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 105 transitions, 1916 flow. Second operand has 23 states, 23 states have (on average 10.347826086956522) internal successors, (238), 23 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:50,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:50,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 10:32:50,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:52,282 INFO L124 PetriNetUnfolderBase]: 2107/3862 cut-off events. [2024-05-12 10:32:52,282 INFO L125 PetriNetUnfolderBase]: For 313449/313449 co-relation queries the response was YES. [2024-05-12 10:32:52,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33851 conditions, 3862 events. 2107/3862 cut-off events. For 313449/313449 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 19824 event pairs, 56 based on Foata normal form. 144/4002 useless extension candidates. Maximal degree in co-relation 33771. Up to 877 conditions per place. [2024-05-12 10:32:52,312 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 145 selfloop transitions, 112 changer transitions 135/396 dead transitions. [2024-05-12 10:32:52,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 396 transitions, 8036 flow [2024-05-12 10:32:52,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-05-12 10:32:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-05-12 10:32:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 707 transitions. [2024-05-12 10:32:52,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123188405797101 [2024-05-12 10:32:52,314 INFO L175 Difference]: Start difference. First operand has 165 places, 105 transitions, 1916 flow. Second operand 46 states and 707 transitions. [2024-05-12 10:32:52,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 396 transitions, 8036 flow [2024-05-12 10:32:52,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 396 transitions, 6955 flow, removed 505 selfloop flow, removed 20 redundant places. [2024-05-12 10:32:52,518 INFO L231 Difference]: Finished difference. Result has 210 places, 139 transitions, 2995 flow [2024-05-12 10:32:52,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1441, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2995, PETRI_PLACES=210, PETRI_TRANSITIONS=139} [2024-05-12 10:32:52,519 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 178 predicate places. [2024-05-12 10:32:52,519 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 139 transitions, 2995 flow [2024-05-12 10:32:52,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.347826086956522) internal successors, (238), 23 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:52,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:52,520 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:52,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-05-12 10:32:52,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-05-12 10:32:52,737 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:32:52,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:52,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1825489756, now seen corresponding path program 4 times [2024-05-12 10:32:52,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:52,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190011436] [2024-05-12 10:32:52,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:52,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:53,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:53,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190011436] [2024-05-12 10:32:53,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190011436] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:32:53,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661258568] [2024-05-12 10:32:53,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 10:32:53,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:32:53,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:32:53,070 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 10:32:53,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-05-12 10:32:53,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 10:32:53,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:32:53,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2024-05-12 10:32:53,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:32:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:53,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:32:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:53,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661258568] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:32:53,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:32:53,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 26 [2024-05-12 10:32:53,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015654501] [2024-05-12 10:32:53,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:32:53,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-05-12 10:32:53,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:53,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-05-12 10:32:53,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2024-05-12 10:32:53,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 10:32:53,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 139 transitions, 2995 flow. Second operand has 27 states, 27 states have (on average 10.444444444444445) internal successors, (282), 27 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:53,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:53,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 10:32:53,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:55,206 INFO L124 PetriNetUnfolderBase]: 2413/4622 cut-off events. [2024-05-12 10:32:55,206 INFO L125 PetriNetUnfolderBase]: For 609794/609794 co-relation queries the response was YES. [2024-05-12 10:32:55,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47445 conditions, 4622 events. 2413/4622 cut-off events. For 609794/609794 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 25550 event pairs, 556 based on Foata normal form. 126/4740 useless extension candidates. Maximal degree in co-relation 47347. Up to 1972 conditions per place. [2024-05-12 10:32:55,244 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 165 selfloop transitions, 87 changer transitions 115/371 dead transitions. [2024-05-12 10:32:55,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 371 transitions, 9785 flow [2024-05-12 10:32:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-05-12 10:32:55,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-05-12 10:32:55,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 567 transitions. [2024-05-12 10:32:55,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49736842105263157 [2024-05-12 10:32:55,246 INFO L175 Difference]: Start difference. First operand has 210 places, 139 transitions, 2995 flow. Second operand 38 states and 567 transitions. [2024-05-12 10:32:55,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 371 transitions, 9785 flow [2024-05-12 10:32:55,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 371 transitions, 7028 flow, removed 1343 selfloop flow, removed 27 redundant places. [2024-05-12 10:32:55,914 INFO L231 Difference]: Finished difference. Result has 229 places, 169 transitions, 3180 flow [2024-05-12 10:32:55,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3180, PETRI_PLACES=229, PETRI_TRANSITIONS=169} [2024-05-12 10:32:55,915 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 197 predicate places. [2024-05-12 10:32:55,915 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 169 transitions, 3180 flow [2024-05-12 10:32:55,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 10.444444444444445) internal successors, (282), 27 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:55,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:32:55,915 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:32:55,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-05-12 10:32:56,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:32:56,127 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:32:56,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:32:56,128 INFO L85 PathProgramCache]: Analyzing trace with hash 90724484, now seen corresponding path program 5 times [2024-05-12 10:32:56,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:32:56,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011309440] [2024-05-12 10:32:56,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:32:56,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:32:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:32:56,446 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:56,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:32:56,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011309440] [2024-05-12 10:32:56,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011309440] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:32:56,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070828031] [2024-05-12 10:32:56,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-05-12 10:32:56,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:32:56,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:32:56,461 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 10:32:56,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-05-12 10:32:56,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-05-12 10:32:56,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:32:56,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2024-05-12 10:32:56,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:32:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:56,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:32:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:32:57,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070828031] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:32:57,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:32:57,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2024-05-12 10:32:57,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712303246] [2024-05-12 10:32:57,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:32:57,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-05-12 10:32:57,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:32:57,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-05-12 10:32:57,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2024-05-12 10:32:57,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 10:32:57,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 169 transitions, 3180 flow. Second operand has 31 states, 31 states have (on average 10.419354838709678) internal successors, (323), 31 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:32:57,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:32:57,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 10:32:57,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:32:59,218 INFO L124 PetriNetUnfolderBase]: 2881/5709 cut-off events. [2024-05-12 10:32:59,219 INFO L125 PetriNetUnfolderBase]: For 679841/679841 co-relation queries the response was YES. [2024-05-12 10:32:59,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53251 conditions, 5709 events. 2881/5709 cut-off events. For 679841/679841 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33976 event pairs, 310 based on Foata normal form. 126/5831 useless extension candidates. Maximal degree in co-relation 53150. Up to 1405 conditions per place. [2024-05-12 10:32:59,269 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 159 selfloop transitions, 175 changer transitions 129/467 dead transitions. [2024-05-12 10:32:59,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 467 transitions, 10597 flow [2024-05-12 10:32:59,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-05-12 10:32:59,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-05-12 10:32:59,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 677 transitions. [2024-05-12 10:32:59,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014814814814815 [2024-05-12 10:32:59,271 INFO L175 Difference]: Start difference. First operand has 229 places, 169 transitions, 3180 flow. Second operand 45 states and 677 transitions. [2024-05-12 10:32:59,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 467 transitions, 10597 flow [2024-05-12 10:33:00,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 467 transitions, 9420 flow, removed 557 selfloop flow, removed 22 redundant places. [2024-05-12 10:33:00,081 INFO L231 Difference]: Finished difference. Result has 262 places, 226 transitions, 4722 flow [2024-05-12 10:33:00,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=2663, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=4722, PETRI_PLACES=262, PETRI_TRANSITIONS=226} [2024-05-12 10:33:00,082 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 230 predicate places. [2024-05-12 10:33:00,082 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 226 transitions, 4722 flow [2024-05-12 10:33:00,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 10.419354838709678) internal successors, (323), 31 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:33:00,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:33:00,082 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:33:00,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-05-12 10:33:00,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-05-12 10:33:00,293 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:33:00,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:33:00,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1890553160, now seen corresponding path program 6 times [2024-05-12 10:33:00,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:33:00,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116758628] [2024-05-12 10:33:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:33:00,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:33:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:33:00,556 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:33:00,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:33:00,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116758628] [2024-05-12 10:33:00,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116758628] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:33:00,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930816253] [2024-05-12 10:33:00,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-05-12 10:33:00,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:33:00,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:33:00,558 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 10:33:00,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-05-12 10:33:00,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-05-12 10:33:00,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:33:00,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2024-05-12 10:33:00,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:33:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:33:00,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:33:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:33:01,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930816253] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:33:01,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:33:01,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2024-05-12 10:33:01,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791595514] [2024-05-12 10:33:01,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:33:01,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-05-12 10:33:01,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:33:01,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-05-12 10:33:01,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2024-05-12 10:33:01,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 10:33:01,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 226 transitions, 4722 flow. Second operand has 31 states, 31 states have (on average 10.32258064516129) internal successors, (320), 31 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:33:01,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:33:01,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 10:33:01,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:33:03,388 INFO L124 PetriNetUnfolderBase]: 3394/6724 cut-off events. [2024-05-12 10:33:03,389 INFO L125 PetriNetUnfolderBase]: For 1068811/1068811 co-relation queries the response was YES. [2024-05-12 10:33:03,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71238 conditions, 6724 events. 3394/6724 cut-off events. For 1068811/1068811 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 40650 event pairs, 94 based on Foata normal form. 126/6842 useless extension candidates. Maximal degree in co-relation 71127. Up to 1663 conditions per place. [2024-05-12 10:33:03,446 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 186 selfloop transitions, 228 changer transitions 121/539 dead transitions. [2024-05-12 10:33:03,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 539 transitions, 13810 flow [2024-05-12 10:33:03,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-05-12 10:33:03,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-05-12 10:33:03,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 752 transitions. [2024-05-12 10:33:03,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115646258503401 [2024-05-12 10:33:03,448 INFO L175 Difference]: Start difference. First operand has 262 places, 226 transitions, 4722 flow. Second operand 49 states and 752 transitions. [2024-05-12 10:33:03,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 539 transitions, 13810 flow [2024-05-12 10:33:04,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 539 transitions, 11961 flow, removed 880 selfloop flow, removed 23 redundant places. [2024-05-12 10:33:04,378 INFO L231 Difference]: Finished difference. Result has 300 places, 262 transitions, 5920 flow [2024-05-12 10:33:04,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=3881, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=5920, PETRI_PLACES=300, PETRI_TRANSITIONS=262} [2024-05-12 10:33:04,379 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 268 predicate places. [2024-05-12 10:33:04,379 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 262 transitions, 5920 flow [2024-05-12 10:33:04,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 10.32258064516129) internal successors, (320), 31 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:33:04,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:33:04,380 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:33:04,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-05-12 10:33:04,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:33:04,584 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:33:04,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:33:04,584 INFO L85 PathProgramCache]: Analyzing trace with hash 500593377, now seen corresponding path program 7 times [2024-05-12 10:33:04,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:33:04,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862835772] [2024-05-12 10:33:04,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:33:04,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:33:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:33:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:33:05,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:33:05,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862835772] [2024-05-12 10:33:05,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862835772] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:33:05,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966379667] [2024-05-12 10:33:05,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-05-12 10:33:05,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:33:05,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:33:05,085 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 10:33:05,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-05-12 10:33:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:33:05,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 22 conjunts are in the unsatisfiable core [2024-05-12 10:33:05,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:33:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:33:05,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:33:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:33:05,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966379667] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:33:05,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:33:05,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 27 [2024-05-12 10:33:05,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741649860] [2024-05-12 10:33:05,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:33:05,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-05-12 10:33:05,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:33:05,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-05-12 10:33:05,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2024-05-12 10:33:05,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 10:33:05,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 262 transitions, 5920 flow. Second operand has 28 states, 28 states have (on average 10.357142857142858) internal successors, (290), 28 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:33:05,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:33:05,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 10:33:05,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:33:08,320 INFO L124 PetriNetUnfolderBase]: 3547/7023 cut-off events. [2024-05-12 10:33:08,320 INFO L125 PetriNetUnfolderBase]: For 1390197/1390197 co-relation queries the response was YES. [2024-05-12 10:33:08,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79276 conditions, 7023 events. 3547/7023 cut-off events. For 1390197/1390197 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 43033 event pairs, 58 based on Foata normal form. 162/7181 useless extension candidates. Maximal degree in co-relation 79151. Up to 1717 conditions per place. [2024-05-12 10:33:08,397 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 179 selfloop transitions, 245 changer transitions 139/567 dead transitions. [2024-05-12 10:33:08,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 567 transitions, 15180 flow [2024-05-12 10:33:08,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-05-12 10:33:08,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-05-12 10:33:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 793 transitions. [2024-05-12 10:33:08,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2024-05-12 10:33:08,399 INFO L175 Difference]: Start difference. First operand has 300 places, 262 transitions, 5920 flow. Second operand 52 states and 793 transitions. [2024-05-12 10:33:08,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 567 transitions, 15180 flow [2024-05-12 10:33:10,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 567 transitions, 13158 flow, removed 918 selfloop flow, removed 28 redundant places. [2024-05-12 10:33:10,316 INFO L231 Difference]: Finished difference. Result has 331 places, 275 transitions, 6383 flow [2024-05-12 10:33:10,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=4846, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=6383, PETRI_PLACES=331, PETRI_TRANSITIONS=275} [2024-05-12 10:33:10,317 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 299 predicate places. [2024-05-12 10:33:10,317 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 275 transitions, 6383 flow [2024-05-12 10:33:10,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.357142857142858) internal successors, (290), 28 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:33:10,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:33:10,318 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:33:10,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-05-12 10:33:10,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:33:10,528 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:33:10,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:33:10,528 INFO L85 PathProgramCache]: Analyzing trace with hash 188685097, now seen corresponding path program 8 times [2024-05-12 10:33:10,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:33:10,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317603837] [2024-05-12 10:33:10,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:33:10,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:33:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:33:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:33:10,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:33:10,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317603837] [2024-05-12 10:33:10,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317603837] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:33:10,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000756428] [2024-05-12 10:33:10,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 10:33:10,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:33:10,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:33:10,905 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 10:33:10,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-05-12 10:33:10,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 10:33:10,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:33:10,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 26 conjunts are in the unsatisfiable core [2024-05-12 10:33:10,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:33:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:33:11,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:33:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:33:11,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000756428] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:33:11,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:33:11,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2024-05-12 10:33:11,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074663265] [2024-05-12 10:33:11,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:33:11,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-05-12 10:33:11,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:33:11,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-05-12 10:33:11,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1769, Unknown=0, NotChecked=0, Total=2256 [2024-05-12 10:33:11,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-05-12 10:33:11,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 275 transitions, 6383 flow. Second operand has 48 states, 48 states have (on average 8.145833333333334) internal successors, (391), 48 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:33:11,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:33:11,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-05-12 10:33:11,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:33:14,296 INFO L124 PetriNetUnfolderBase]: 3493/6887 cut-off events. [2024-05-12 10:33:14,297 INFO L125 PetriNetUnfolderBase]: For 1377673/1377673 co-relation queries the response was YES. [2024-05-12 10:33:14,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76042 conditions, 6887 events. 3493/6887 cut-off events. For 1377673/1377673 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 41493 event pairs, 122 based on Foata normal form. 36/6919 useless extension candidates. Maximal degree in co-relation 75910. Up to 1675 conditions per place. [2024-05-12 10:33:14,365 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 203 selfloop transitions, 268 changer transitions 117/592 dead transitions. [2024-05-12 10:33:14,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 592 transitions, 15687 flow [2024-05-12 10:33:14,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-05-12 10:33:14,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-05-12 10:33:14,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 687 transitions. [2024-05-12 10:33:14,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403846153846154 [2024-05-12 10:33:14,367 INFO L175 Difference]: Start difference. First operand has 331 places, 275 transitions, 6383 flow. Second operand 52 states and 687 transitions. [2024-05-12 10:33:14,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 592 transitions, 15687 flow [2024-05-12 10:33:16,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 592 transitions, 13583 flow, removed 861 selfloop flow, removed 41 redundant places. [2024-05-12 10:33:16,786 INFO L231 Difference]: Finished difference. Result has 346 places, 308 transitions, 7005 flow [2024-05-12 10:33:16,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=5181, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=7005, PETRI_PLACES=346, PETRI_TRANSITIONS=308} [2024-05-12 10:33:16,788 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 314 predicate places. [2024-05-12 10:33:16,788 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 308 transitions, 7005 flow [2024-05-12 10:33:16,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 8.145833333333334) internal successors, (391), 48 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:33:16,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:33:16,789 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:33:16,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-05-12 10:33:16,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-05-12 10:33:16,992 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:33:16,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:33:16,993 INFO L85 PathProgramCache]: Analyzing trace with hash 21589920, now seen corresponding path program 9 times [2024-05-12 10:33:16,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:33:16,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623685892] [2024-05-12 10:33:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:33:16,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:33:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:33:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 250 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 10:33:17,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:33:17,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623685892] [2024-05-12 10:33:17,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623685892] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:33:17,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839973036] [2024-05-12 10:33:17,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 10:33:17,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:33:17,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:33:17,165 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 10:33:17,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-05-12 10:33:17,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-05-12 10:33:17,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:33:17,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 12 conjunts are in the unsatisfiable core [2024-05-12 10:33:17,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:33:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 10:33:17,316 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-05-12 10:33:17,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839973036] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:33:17,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-05-12 10:33:17,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2024-05-12 10:33:17,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277368587] [2024-05-12 10:33:17,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:33:17,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-05-12 10:33:17,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:33:17,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-05-12 10:33:17,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2024-05-12 10:33:17,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 30 [2024-05-12 10:33:17,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 308 transitions, 7005 flow. Second operand has 13 states, 13 states have (on average 16.076923076923077) internal successors, (209), 13 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:33:17,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:33:17,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 30 [2024-05-12 10:33:17,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:33:23,006 INFO L124 PetriNetUnfolderBase]: 11596/23091 cut-off events. [2024-05-12 10:33:23,007 INFO L125 PetriNetUnfolderBase]: For 3447217/3450899 co-relation queries the response was YES. [2024-05-12 10:33:23,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194114 conditions, 23091 events. 11596/23091 cut-off events. For 3447217/3450899 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 196695 event pairs, 704 based on Foata normal form. 238/20609 useless extension candidates. Maximal degree in co-relation 193990. Up to 4743 conditions per place. [2024-05-12 10:33:23,250 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 0 selfloop transitions, 0 changer transitions 395/395 dead transitions. [2024-05-12 10:33:23,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 395 transitions, 6676 flow [2024-05-12 10:33:23,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:33:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:33:23,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 290 transitions. [2024-05-12 10:33:23,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7435897435897436 [2024-05-12 10:33:23,273 INFO L175 Difference]: Start difference. First operand has 346 places, 308 transitions, 7005 flow. Second operand 13 states and 290 transitions. [2024-05-12 10:33:23,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 395 transitions, 6676 flow [2024-05-12 10:33:28,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 395 transitions, 5906 flow, removed 177 selfloop flow, removed 46 redundant places. [2024-05-12 10:33:28,773 INFO L231 Difference]: Finished difference. Result has 305 places, 0 transitions, 0 flow [2024-05-12 10:33:28,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=5434, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=0, PETRI_PLACES=305, PETRI_TRANSITIONS=0} [2024-05-12 10:33:28,774 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 273 predicate places. [2024-05-12 10:33:28,774 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 0 transitions, 0 flow [2024-05-12 10:33:28,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.076923076923077) internal successors, (209), 13 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:33:28,777 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 5 remaining) [2024-05-12 10:33:28,777 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-05-12 10:33:28,777 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-05-12 10:33:28,777 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2024-05-12 10:33:28,777 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2024-05-12 10:33:28,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-05-12 10:33:28,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-05-12 10:33:28,988 INFO L445 BasicCegarLoop]: Path program histogram: [9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:33:28,990 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-05-12 10:33:28,990 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-05-12 10:33:28,993 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-05-12 10:33:28,993 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-05-12 10:33:28,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.05 10:33:28 BasicIcfg [2024-05-12 10:33:28,994 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-05-12 10:33:28,994 INFO L158 Benchmark]: Toolchain (without parser) took 49585.20ms. Allocated memory was 155.2MB in the beginning and 9.7GB in the end (delta: 9.6GB). Free memory was 93.5MB in the beginning and 8.4GB in the end (delta: -8.3GB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. [2024-05-12 10:33:28,995 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 155.2MB. Free memory is still 120.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-05-12 10:33:28,995 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 155.2MB. Free memory was 117.3MB in the beginning and 117.2MB in the end (delta: 126.6kB). There was no memory consumed. Max. memory is 16.1GB. [2024-05-12 10:33:28,995 INFO L158 Benchmark]: CACSL2BoogieTranslator took 520.05ms. Allocated memory is still 155.2MB. Free memory was 93.4MB in the beginning and 68.0MB in the end (delta: 25.3MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-05-12 10:33:28,995 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.81ms. Allocated memory is still 155.2MB. Free memory was 68.0MB in the beginning and 65.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-05-12 10:33:28,995 INFO L158 Benchmark]: Boogie Preprocessor took 68.62ms. Allocated memory is still 155.2MB. Free memory was 65.8MB in the beginning and 63.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-05-12 10:33:28,996 INFO L158 Benchmark]: RCFGBuilder took 558.68ms. Allocated memory is still 155.2MB. Free memory was 63.5MB in the beginning and 119.2MB in the end (delta: -55.7MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-05-12 10:33:28,996 INFO L158 Benchmark]: TraceAbstraction took 48369.26ms. Allocated memory was 155.2MB in the beginning and 9.7GB in the end (delta: 9.6GB). Free memory was 118.7MB in the beginning and 8.4GB in the end (delta: -8.2GB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. [2024-05-12 10:33:28,997 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.16ms. Allocated memory is still 155.2MB. Free memory is still 120.5MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.21ms. Allocated memory is still 155.2MB. Free memory was 117.3MB in the beginning and 117.2MB in the end (delta: 126.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 520.05ms. Allocated memory is still 155.2MB. Free memory was 93.4MB in the beginning and 68.0MB in the end (delta: 25.3MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.81ms. Allocated memory is still 155.2MB. Free memory was 68.0MB in the beginning and 65.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 68.62ms. Allocated memory is still 155.2MB. Free memory was 65.8MB in the beginning and 63.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 558.68ms. Allocated memory is still 155.2MB. Free memory was 63.5MB in the beginning and 119.2MB in the end (delta: -55.7MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 48369.26ms. Allocated memory was 155.2MB in the beginning and 9.7GB in the end (delta: 9.6GB). Free memory was 118.7MB in the beginning and 8.4GB in the end (delta: -8.2GB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 714]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 715]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 722]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 40 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 48.3s, OverallIterations: 22, TraceHistogramMax: 11, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 37.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6606 SdHoareTripleChecker+Valid, 5.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6431 mSDsluCounter, 368 SdHoareTripleChecker+Invalid, 4.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 332 mSDsCounter, 343 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9895 IncrementalHoareTripleChecker+Invalid, 10238 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 343 mSolverCounterUnsat, 36 mSDtfsCounter, 9895 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1514 GetRequests, 849 SyntacticMatches, 16 SemanticMatches, 649 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10265 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7005occurred in iteration=21, InterpolantAutomatonStates: 471, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.9s InterpolantComputationTime, 1195 NumberOfCodeBlocks, 1195 NumberOfCodeBlocksAsserted, 67 NumberOfCheckSat, 1601 ConstructedInterpolants, 0 QuantifiedInterpolants, 6869 SizeOfPredicates, 114 NumberOfNonLiveVariables, 1972 ConjunctsInSsa, 187 ConjunctsInUnsatCore, 45 InterpolantComputations, 12 PerfectInterpolantSequences, 538/2944 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-05-12 10:33:29,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE