./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/bench-exp2x4.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/bench-exp2x4.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7c74aec Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/bench-exp2x4.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/bench-exp2x4.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.fix-undeclared-acsl-variable-e7c74ae-m [2024-02-07 19:08:13,155 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 19:08:13,280 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 19:08:13,286 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 19:08:13,287 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 19:08:13,326 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 19:08:13,329 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 19:08:13,329 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 19:08:13,330 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 19:08:13,335 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 19:08:13,335 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 19:08:13,336 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 19:08:13,336 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 19:08:13,338 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 19:08:13,338 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 19:08:13,339 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 19:08:13,339 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 19:08:13,339 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 19:08:13,339 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 19:08:13,340 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 19:08:13,340 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 19:08:13,341 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 19:08:13,341 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 19:08:13,341 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 19:08:13,341 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 19:08:13,342 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 19:08:13,342 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 19:08:13,342 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 19:08:13,343 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 19:08:13,343 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 19:08:13,345 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 19:08:13,345 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 19:08:13,345 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:08:13,345 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 19:08:13,346 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 19:08:13,346 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 19:08:13,346 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 19:08:13,346 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 19:08:13,346 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 19:08:13,346 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 19:08:13,347 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 19:08:13,347 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 19:08:13,347 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 19:08:13,347 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 19:08:13,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 19:08:13,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 19:08:13,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 19:08:13,662 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 19:08:13,663 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 19:08:13,665 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp2x4.wvr.c [2024-02-07 19:08:15,145 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 19:08:15,362 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 19:08:15,362 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp2x4.wvr.c [2024-02-07 19:08:15,386 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48010ba09/72b608057b944bf9940c7b21e0d0fffb/FLAGbcca3495d [2024-02-07 19:08:15,402 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48010ba09/72b608057b944bf9940c7b21e0d0fffb [2024-02-07 19:08:15,409 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 19:08:15,410 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 19:08:15,412 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/bench-exp2x4.wvr.yml/witness.yml [2024-02-07 19:08:15,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 19:08:15,503 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 19:08:15,504 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 19:08:15,504 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 19:08:15,509 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 19:08:15,510 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:08:15" (1/2) ... [2024-02-07 19:08:15,511 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d61deeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:08:15, skipping insertion in model container [2024-02-07 19:08:15,512 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:08:15" (1/2) ... [2024-02-07 19:08:15,514 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@42ed66c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:08:15, skipping insertion in model container [2024-02-07 19:08:15,514 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:08:15" (2/2) ... [2024-02-07 19:08:15,515 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d61deeb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:08:15, skipping insertion in model container [2024-02-07 19:08:15,515 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:08:15" (2/2) ... [2024-02-07 19:08:15,515 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 19:08:15,537 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 19:08:15,539 INFO L76 edCorrectnessWitness]: Location invariant before [L77-L77] ((((0LL - (long long )x1) + (long long )x3 >= 0LL) && ((long long )x1 + (long long )x3 >= 0LL)) && ((0LL - (long long )x1) - (long long )x3 >= 0LL)) && ((long long )x1 - (long long )x3 >= 0LL) [2024-02-07 19:08:15,563 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 19:08:15,761 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp2x4.wvr.c[2361,2374] [2024-02-07 19:08:15,770 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:08:15,787 INFO L206 MainTranslator]: Completed pre-run Start Parsing Local [2024-02-07 19:08:15,846 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp2x4.wvr.c[2361,2374] [2024-02-07 19:08:15,851 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:08:15,880 INFO L211 MainTranslator]: Completed translation [2024-02-07 19:08:15,881 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:08:15 WrapperNode [2024-02-07 19:08:15,881 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 19:08:15,883 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 19:08:15,883 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 19:08:15,883 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 19:08:15,890 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:08:15" (1/1) ... [2024-02-07 19:08:15,911 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:08:15" (1/1) ... [2024-02-07 19:08:15,948 INFO L138 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2024-02-07 19:08:15,950 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 19:08:15,952 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 19:08:15,952 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 19:08:15,952 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 19:08:15,963 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:08:15" (1/1) ... [2024-02-07 19:08:15,964 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:08:15" (1/1) ... [2024-02-07 19:08:15,967 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:08:15" (1/1) ... [2024-02-07 19:08:15,983 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-02-07 19:08:15,984 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:08:15" (1/1) ... [2024-02-07 19:08:15,984 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:08:15" (1/1) ... [2024-02-07 19:08:15,995 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:08:15" (1/1) ... [2024-02-07 19:08:15,999 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:08:15" (1/1) ... [2024-02-07 19:08:16,001 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:08:15" (1/1) ... [2024-02-07 19:08:16,002 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:08:15" (1/1) ... [2024-02-07 19:08:16,005 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 19:08:16,006 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 19:08:16,006 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 19:08:16,006 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 19:08:16,007 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:08:15" (1/1) ... [2024-02-07 19:08:16,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:08:16,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:08:16,033 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-07 19:08:16,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-07 19:08:16,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 19:08:16,072 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 19:08:16,073 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 19:08:16,073 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 19:08:16,073 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 19:08:16,073 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-07 19:08:16,073 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-07 19:08:16,074 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-02-07 19:08:16,074 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-02-07 19:08:16,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 19:08:16,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 19:08:16,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 19:08:16,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 19:08:16,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-07 19:08:16,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 19:08:16,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 19:08:16,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 19:08:16,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 19:08:16,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 19:08:16,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-07 19:08:16,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 19:08:16,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 19:08:16,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 19:08:16,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 19:08:16,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 19:08:16,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 19:08:16,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-07 19:08:16,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 19:08:16,089 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 19:08:16,197 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 19:08:16,199 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 19:08:16,433 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 19:08:16,433 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 19:08:16,585 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 19:08:16,586 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-02-07 19:08:16,586 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:08:16 BoogieIcfgContainer [2024-02-07 19:08:16,587 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 19:08:16,589 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 19:08:16,589 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 19:08:16,592 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 19:08:16,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 07:08:15" (1/4) ... [2024-02-07 19:08:16,594 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6cff15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:08:16, skipping insertion in model container [2024-02-07 19:08:16,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:08:15" (2/4) ... [2024-02-07 19:08:16,594 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6cff15 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:08:16, skipping insertion in model container [2024-02-07 19:08:16,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:08:15" (3/4) ... [2024-02-07 19:08:16,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6cff15 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:08:16, skipping insertion in model container [2024-02-07 19:08:16,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:08:16" (4/4) ... [2024-02-07 19:08:16,596 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x4.wvr.c [2024-02-07 19:08:16,617 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 19:08:16,617 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-02-07 19:08:16,618 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 19:08:16,694 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-02-07 19:08:16,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 37 transitions, 102 flow [2024-02-07 19:08:16,773 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-02-07 19:08:16,773 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-07 19:08:16,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 33 events. 4/33 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 18 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2024-02-07 19:08:16,777 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 37 transitions, 102 flow [2024-02-07 19:08:16,783 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 32 transitions, 88 flow [2024-02-07 19:08:16,801 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:08:16,807 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;@3e9bd568, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:08:16,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-02-07 19:08:16,817 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:08:16,818 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 19:08:16,818 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:08:16,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:08:16,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 19:08:16,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:08:16,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:08:16,832 INFO L85 PathProgramCache]: Analyzing trace with hash 10573, now seen corresponding path program 1 times [2024-02-07 19:08:16,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:08:16,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104357203] [2024-02-07 19:08:16,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:08:16,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:08:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:08:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:08:17,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:08:17,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104357203] [2024-02-07 19:08:17,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104357203] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:08:17,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:08:17,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:08:17,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871643191] [2024-02-07 19:08:17,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:08:17,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:08:17,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:08:17,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:08:17,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:08:17,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-02-07 19:08:17,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:08:17,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:08:17,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-02-07 19:08:17,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:08:17,693 INFO L124 PetriNetUnfolderBase]: 1132/1455 cut-off events. [2024-02-07 19:08:17,693 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-02-07 19:08:17,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2999 conditions, 1455 events. 1132/1455 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4753 event pairs, 522 based on Foata normal form. 0/819 useless extension candidates. Maximal degree in co-relation 2240. Up to 1418 conditions per place. [2024-02-07 19:08:17,715 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 24 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-02-07 19:08:17,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 31 transitions, 138 flow [2024-02-07 19:08:17,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:08:17,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:08:17,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-02-07 19:08:17,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2024-02-07 19:08:17,731 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 88 flow. Second operand 3 states and 54 transitions. [2024-02-07 19:08:17,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 31 transitions, 138 flow [2024-02-07 19:08:17,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 31 transitions, 122 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-02-07 19:08:17,743 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 74 flow [2024-02-07 19:08:17,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2024-02-07 19:08:17,750 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -7 predicate places. [2024-02-07 19:08:17,751 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 74 flow [2024-02-07 19:08:17,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:08:17,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:08:17,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:08:17,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 19:08:17,753 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:08:17,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:08:17,754 INFO L85 PathProgramCache]: Analyzing trace with hash 809585423, now seen corresponding path program 1 times [2024-02-07 19:08:17,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:08:17,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488545247] [2024-02-07 19:08:17,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:08:17,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:08:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:08:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:08:17,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:08:17,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488545247] [2024-02-07 19:08:17,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488545247] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:08:17,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:08:17,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:08:17,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509702309] [2024-02-07 19:08:17,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:08:17,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:08:17,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:08:17,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:08:17,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:08:18,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 19:08:18,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:08:18,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:08:18,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 19:08:18,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:08:18,216 INFO L124 PetriNetUnfolderBase]: 1537/1956 cut-off events. [2024-02-07 19:08:18,217 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-02-07 19:08:18,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3952 conditions, 1956 events. 1537/1956 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6391 event pairs, 141 based on Foata normal form. 1/1130 useless extension candidates. Maximal degree in co-relation 3943. Up to 1733 conditions per place. [2024-02-07 19:08:18,232 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 42 selfloop transitions, 5 changer transitions 1/53 dead transitions. [2024-02-07 19:08:18,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 221 flow [2024-02-07 19:08:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:08:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:08:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-02-07 19:08:18,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7117117117117117 [2024-02-07 19:08:18,236 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 74 flow. Second operand 3 states and 79 transitions. [2024-02-07 19:08:18,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 221 flow [2024-02-07 19:08:18,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 53 transitions, 217 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:08:18,238 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 103 flow [2024-02-07 19:08:18,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2024-02-07 19:08:18,239 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -6 predicate places. [2024-02-07 19:08:18,240 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 103 flow [2024-02-07 19:08:18,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:08:18,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:08:18,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:08:18,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 19:08:18,241 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:08:18,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:08:18,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1264495030, now seen corresponding path program 1 times [2024-02-07 19:08:18,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:08:18,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100120131] [2024-02-07 19:08:18,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:08:18,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:08:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:08:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:08:18,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:08:18,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100120131] [2024-02-07 19:08:18,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100120131] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:08:18,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:08:18,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:08:18,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016273772] [2024-02-07 19:08:18,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:08:18,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:08:18,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:08:18,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:08:18,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:08:18,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 19:08:18,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 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) [2024-02-07 19:08:18,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:08:18,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 19:08:18,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:08:18,709 INFO L124 PetriNetUnfolderBase]: 1837/2363 cut-off events. [2024-02-07 19:08:18,709 INFO L125 PetriNetUnfolderBase]: For 591/591 co-relation queries the response was YES. [2024-02-07 19:08:18,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5860 conditions, 2363 events. 1837/2363 cut-off events. For 591/591 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 8378 event pairs, 98 based on Foata normal form. 34/2385 useless extension candidates. Maximal degree in co-relation 1437. Up to 964 conditions per place. [2024-02-07 19:08:18,729 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 72 selfloop transitions, 11 changer transitions 0/88 dead transitions. [2024-02-07 19:08:18,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 88 transitions, 419 flow [2024-02-07 19:08:18,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:08:18,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:08:18,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-02-07 19:08:18,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6864864864864865 [2024-02-07 19:08:18,732 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 103 flow. Second operand 5 states and 127 transitions. [2024-02-07 19:08:18,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 88 transitions, 419 flow [2024-02-07 19:08:18,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 88 transitions, 411 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:08:18,734 INFO L231 Difference]: Finished difference. Result has 40 places, 42 transitions, 167 flow [2024-02-07 19:08:18,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=167, PETRI_PLACES=40, PETRI_TRANSITIONS=42} [2024-02-07 19:08:18,735 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2024-02-07 19:08:18,736 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 42 transitions, 167 flow [2024-02-07 19:08:18,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 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) [2024-02-07 19:08:18,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:08:18,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:08:18,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 19:08:18,737 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:08:18,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:08:18,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1224936498, now seen corresponding path program 2 times [2024-02-07 19:08:18,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:08:18,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082177152] [2024-02-07 19:08:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:08:18,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:08:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:08:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:08:18,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:08:18,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082177152] [2024-02-07 19:08:18,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082177152] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:08:18,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:08:18,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:08:18,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075088487] [2024-02-07 19:08:18,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:08:18,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:08:18,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:08:18,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:08:18,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:08:18,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 19:08:18,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 42 transitions, 167 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 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) [2024-02-07 19:08:18,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:08:18,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 19:08:18,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:08:19,143 INFO L124 PetriNetUnfolderBase]: 1743/2279 cut-off events. [2024-02-07 19:08:19,144 INFO L125 PetriNetUnfolderBase]: For 1824/1824 co-relation queries the response was YES. [2024-02-07 19:08:19,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6840 conditions, 2279 events. 1743/2279 cut-off events. For 1824/1824 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8547 event pairs, 365 based on Foata normal form. 70/2311 useless extension candidates. Maximal degree in co-relation 1731. Up to 1211 conditions per place. [2024-02-07 19:08:19,166 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 73 selfloop transitions, 10 changer transitions 0/88 dead transitions. [2024-02-07 19:08:19,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 88 transitions, 474 flow [2024-02-07 19:08:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:08:19,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:08:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-02-07 19:08:19,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6864864864864865 [2024-02-07 19:08:19,169 INFO L175 Difference]: Start difference. First operand has 40 places, 42 transitions, 167 flow. Second operand 5 states and 127 transitions. [2024-02-07 19:08:19,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 88 transitions, 474 flow [2024-02-07 19:08:19,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 88 transitions, 474 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:08:19,174 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 221 flow [2024-02-07 19:08:19,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2024-02-07 19:08:19,175 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 5 predicate places. [2024-02-07 19:08:19,175 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 221 flow [2024-02-07 19:08:19,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 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) [2024-02-07 19:08:19,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:08:19,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:08:19,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 19:08:19,176 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:08:19,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:08:19,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1668584551, now seen corresponding path program 1 times [2024-02-07 19:08:19,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:08:19,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513816403] [2024-02-07 19:08:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:08:19,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:08:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:08:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:08:19,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:08:19,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513816403] [2024-02-07 19:08:19,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513816403] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:08:19,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:08:19,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:08:19,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384410915] [2024-02-07 19:08:19,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:08:19,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:08:19,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:08:19,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:08:19,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:08:19,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 19:08:19,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 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) [2024-02-07 19:08:19,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:08:19,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 19:08:19,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:08:19,577 INFO L124 PetriNetUnfolderBase]: 1709/2235 cut-off events. [2024-02-07 19:08:19,577 INFO L125 PetriNetUnfolderBase]: For 3477/3477 co-relation queries the response was YES. [2024-02-07 19:08:19,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7387 conditions, 2235 events. 1709/2235 cut-off events. For 3477/3477 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 8380 event pairs, 118 based on Foata normal form. 58/2281 useless extension candidates. Maximal degree in co-relation 3826. Up to 906 conditions per place. [2024-02-07 19:08:19,597 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 75 selfloop transitions, 9 changer transitions 0/89 dead transitions. [2024-02-07 19:08:19,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 89 transitions, 510 flow [2024-02-07 19:08:19,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:08:19,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:08:19,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-02-07 19:08:19,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6810810810810811 [2024-02-07 19:08:19,600 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 221 flow. Second operand 5 states and 126 transitions. [2024-02-07 19:08:19,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 89 transitions, 510 flow [2024-02-07 19:08:19,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 89 transitions, 501 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-02-07 19:08:19,609 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 228 flow [2024-02-07 19:08:19,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=228, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-02-07 19:08:19,610 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-02-07 19:08:19,610 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 228 flow [2024-02-07 19:08:19,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 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) [2024-02-07 19:08:19,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:08:19,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:08:19,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 19:08:19,611 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:08:19,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:08:19,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1993052358, now seen corresponding path program 1 times [2024-02-07 19:08:19,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:08:19,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267986560] [2024-02-07 19:08:19,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:08:19,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:08:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:08:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:08:19,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:08:19,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267986560] [2024-02-07 19:08:19,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267986560] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:08:19,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482118309] [2024-02-07 19:08:19,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:08:19,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:08:19,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:08:19,713 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:08:19,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 19:08:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:08:19,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-07 19:08:19,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:08:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:08:20,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:08:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:08:20,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482118309] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:08:20,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:08:20,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-02-07 19:08:20,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170621627] [2024-02-07 19:08:20,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:08:20,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:08:20,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:08:20,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:08:20,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-02-07 19:08:20,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 19:08:20,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 228 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:08:20,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:08:20,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 19:08:20,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:08:20,547 INFO L124 PetriNetUnfolderBase]: 2045/2783 cut-off events. [2024-02-07 19:08:20,547 INFO L125 PetriNetUnfolderBase]: For 7066/7066 co-relation queries the response was YES. [2024-02-07 19:08:20,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9834 conditions, 2783 events. 2045/2783 cut-off events. For 7066/7066 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 11738 event pairs, 323 based on Foata normal form. 80/2809 useless extension candidates. Maximal degree in co-relation 5006. Up to 1205 conditions per place. [2024-02-07 19:08:20,581 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 102 selfloop transitions, 9 changer transitions 0/116 dead transitions. [2024-02-07 19:08:20,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 116 transitions, 865 flow [2024-02-07 19:08:20,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 19:08:20,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 19:08:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-02-07 19:08:20,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6081081081081081 [2024-02-07 19:08:20,584 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 228 flow. Second operand 6 states and 135 transitions. [2024-02-07 19:08:20,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 116 transitions, 865 flow [2024-02-07 19:08:20,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 116 transitions, 830 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-02-07 19:08:20,593 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 272 flow [2024-02-07 19:08:20,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=272, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-02-07 19:08:20,597 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 15 predicate places. [2024-02-07 19:08:20,597 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 272 flow [2024-02-07 19:08:20,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:08:20,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:08:20,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:08:20,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-07 19:08:20,817 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,SelfDestructingSolverStorable5 [2024-02-07 19:08:20,817 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:08:20,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:08:20,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1019249255, now seen corresponding path program 1 times [2024-02-07 19:08:20,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:08:20,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815197165] [2024-02-07 19:08:20,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:08:20,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:08:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:08:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:08:20,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:08:20,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815197165] [2024-02-07 19:08:20,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815197165] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:08:20,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:08:20,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:08:20,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264636968] [2024-02-07 19:08:20,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:08:20,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:08:20,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:08:20,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:08:20,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:08:20,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 19:08:20,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 272 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 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) [2024-02-07 19:08:20,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:08:20,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 19:08:20,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:08:21,306 INFO L124 PetriNetUnfolderBase]: 2003/2729 cut-off events. [2024-02-07 19:08:21,306 INFO L125 PetriNetUnfolderBase]: For 7676/7676 co-relation queries the response was YES. [2024-02-07 19:08:21,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11210 conditions, 2729 events. 2003/2729 cut-off events. For 7676/7676 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11124 event pairs, 75 based on Foata normal form. 42/2741 useless extension candidates. Maximal degree in co-relation 6896. Up to 1137 conditions per place. [2024-02-07 19:08:21,335 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 104 selfloop transitions, 11 changer transitions 0/120 dead transitions. [2024-02-07 19:08:21,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 120 transitions, 914 flow [2024-02-07 19:08:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:08:21,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:08:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-02-07 19:08:21,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6648648648648648 [2024-02-07 19:08:21,338 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 272 flow. Second operand 5 states and 123 transitions. [2024-02-07 19:08:21,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 120 transitions, 914 flow [2024-02-07 19:08:21,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 120 transitions, 912 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:08:21,351 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 335 flow [2024-02-07 19:08:21,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=335, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-02-07 19:08:21,352 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-02-07 19:08:21,352 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 335 flow [2024-02-07 19:08:21,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 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) [2024-02-07 19:08:21,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:08:21,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:08:21,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 19:08:21,353 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:08:21,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:08:21,354 INFO L85 PathProgramCache]: Analyzing trace with hash -691303410, now seen corresponding path program 2 times [2024-02-07 19:08:21,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:08:21,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631917162] [2024-02-07 19:08:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:08:21,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:08:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:08:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:08:21,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:08:21,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631917162] [2024-02-07 19:08:21,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631917162] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:08:21,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:08:21,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:08:21,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809550895] [2024-02-07 19:08:21,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:08:21,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:08:21,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:08:21,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:08:21,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:08:21,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 19:08:21,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 335 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 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) [2024-02-07 19:08:21,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:08:21,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 19:08:21,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:08:21,790 INFO L124 PetriNetUnfolderBase]: 1801/2441 cut-off events. [2024-02-07 19:08:21,790 INFO L125 PetriNetUnfolderBase]: For 7812/7812 co-relation queries the response was YES. [2024-02-07 19:08:21,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10745 conditions, 2441 events. 1801/2441 cut-off events. For 7812/7812 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 9503 event pairs, 99 based on Foata normal form. 38/2449 useless extension candidates. Maximal degree in co-relation 6631. Up to 987 conditions per place. [2024-02-07 19:08:21,810 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 98 selfloop transitions, 10 changer transitions 4/117 dead transitions. [2024-02-07 19:08:21,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 117 transitions, 919 flow [2024-02-07 19:08:21,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:08:21,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:08:21,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-02-07 19:08:21,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6594594594594595 [2024-02-07 19:08:21,812 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 335 flow. Second operand 5 states and 122 transitions. [2024-02-07 19:08:21,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 117 transitions, 919 flow [2024-02-07 19:08:21,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 117 transitions, 906 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-02-07 19:08:21,826 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 337 flow [2024-02-07 19:08:21,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=337, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2024-02-07 19:08:21,827 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-02-07 19:08:21,827 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 337 flow [2024-02-07 19:08:21,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 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) [2024-02-07 19:08:21,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:08:21,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:08:21,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 19:08:21,828 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:08:21,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:08:21,829 INFO L85 PathProgramCache]: Analyzing trace with hash 371198481, now seen corresponding path program 2 times [2024-02-07 19:08:21,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:08:21,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143906128] [2024-02-07 19:08:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:08:21,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:08:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:08:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:08:21,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:08:21,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143906128] [2024-02-07 19:08:21,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143906128] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:08:21,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850111171] [2024-02-07 19:08:21,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:08:21,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:08:21,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:08:21,925 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) [2024-02-07 19:08:21,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 19:08:22,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:08:22,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:08:22,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-07 19:08:22,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:08:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:08:22,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:08:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:08:22,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850111171] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:08:22,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:08:22,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-02-07 19:08:22,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690898587] [2024-02-07 19:08:22,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:08:22,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:08:22,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:08:22,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:08:22,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-02-07 19:08:22,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 19:08:22,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:08:22,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:08:22,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 19:08:22,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:08:22,600 INFO L124 PetriNetUnfolderBase]: 1725/2377 cut-off events. [2024-02-07 19:08:22,601 INFO L125 PetriNetUnfolderBase]: For 8081/8081 co-relation queries the response was YES. [2024-02-07 19:08:22,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10790 conditions, 2377 events. 1725/2377 cut-off events. For 8081/8081 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 9822 event pairs, 293 based on Foata normal form. 76/2411 useless extension candidates. Maximal degree in co-relation 6791. Up to 1307 conditions per place. [2024-02-07 19:08:22,620 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 101 selfloop transitions, 9 changer transitions 0/115 dead transitions. [2024-02-07 19:08:22,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 115 transitions, 933 flow [2024-02-07 19:08:22,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 19:08:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 19:08:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-02-07 19:08:22,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.581081081081081 [2024-02-07 19:08:22,622 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 337 flow. Second operand 6 states and 129 transitions. [2024-02-07 19:08:22,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 115 transitions, 933 flow [2024-02-07 19:08:22,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 115 transitions, 920 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-02-07 19:08:22,629 INFO L231 Difference]: Finished difference. Result has 69 places, 56 transitions, 376 flow [2024-02-07 19:08:22,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=69, PETRI_TRANSITIONS=56} [2024-02-07 19:08:22,630 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-02-07 19:08:22,630 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 56 transitions, 376 flow [2024-02-07 19:08:22,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:08:22,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:08:22,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:08:22,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-07 19:08:22,843 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,SelfDestructingSolverStorable8 [2024-02-07 19:08:22,843 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:08:22,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:08:22,844 INFO L85 PathProgramCache]: Analyzing trace with hash 289831469, now seen corresponding path program 2 times [2024-02-07 19:08:22,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:08:22,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204499011] [2024-02-07 19:08:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:08:22,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:08:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:08:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:08:22,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:08:22,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204499011] [2024-02-07 19:08:22,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204499011] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:08:22,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936906905] [2024-02-07 19:08:22,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:08:22,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:08:22,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:08:22,912 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) [2024-02-07 19:08:22,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 19:08:23,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:08:23,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:08:23,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-07 19:08:23,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:08:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:08:23,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:08:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:08:23,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936906905] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:08:23,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:08:23,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-02-07 19:08:23,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133711249] [2024-02-07 19:08:23,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:08:23,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:08:23,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:08:23,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:08:23,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-02-07 19:08:23,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 19:08:23,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 56 transitions, 376 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:08:23,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:08:23,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 19:08:23,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:08:23,568 INFO L124 PetriNetUnfolderBase]: 1657/2292 cut-off events. [2024-02-07 19:08:23,568 INFO L125 PetriNetUnfolderBase]: For 8514/8538 co-relation queries the response was YES. [2024-02-07 19:08:23,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11026 conditions, 2292 events. 1657/2292 cut-off events. For 8514/8538 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9685 event pairs, 481 based on Foata normal form. 72/2343 useless extension candidates. Maximal degree in co-relation 9644. Up to 1331 conditions per place. [2024-02-07 19:08:23,591 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 117 selfloop transitions, 9 changer transitions 0/131 dead transitions. [2024-02-07 19:08:23,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 131 transitions, 1120 flow [2024-02-07 19:08:23,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 19:08:23,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 19:08:23,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-02-07 19:08:23,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990990990990991 [2024-02-07 19:08:23,593 INFO L175 Difference]: Start difference. First operand has 69 places, 56 transitions, 376 flow. Second operand 6 states and 133 transitions. [2024-02-07 19:08:23,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 131 transitions, 1120 flow [2024-02-07 19:08:23,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 131 transitions, 1060 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-02-07 19:08:23,607 INFO L231 Difference]: Finished difference. Result has 73 places, 59 transitions, 413 flow [2024-02-07 19:08:23,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=413, PETRI_PLACES=73, PETRI_TRANSITIONS=59} [2024-02-07 19:08:23,608 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-02-07 19:08:23,608 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 59 transitions, 413 flow [2024-02-07 19:08:23,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:08:23,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:08:23,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:08:23,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-07 19:08:23,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:08:23,850 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:08:23,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:08:23,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1127101050, now seen corresponding path program 1 times [2024-02-07 19:08:23,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:08:23,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919331772] [2024-02-07 19:08:23,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:08:23,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:08:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:08:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:08:24,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:08:24,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919331772] [2024-02-07 19:08:24,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919331772] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:08:24,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227026351] [2024-02-07 19:08:24,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:08:24,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:08:24,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:08:24,417 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) [2024-02-07 19:08:24,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-07 19:08:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:08:24,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-07 19:08:24,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:09:36,941 WARN L293 SmtUtils]: Spent 8.46s on a formula simplification. DAG size of input: 34 DAG size of output: 33 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-07 19:10:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:10:19,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:10:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:10:28,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227026351] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:10:28,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:10:28,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2024-02-07 19:10:28,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465731591] [2024-02-07 19:10:28,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:10:28,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-07 19:10:28,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:10:28,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-07 19:10:28,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=189, Unknown=7, NotChecked=0, Total=272 [2024-02-07 19:10:32,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:10:32,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-02-07 19:10:32,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 59 transitions, 413 flow. Second operand has 17 states, 17 states have (on average 12.764705882352942) internal successors, (217), 17 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:10:32,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:10:32,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-02-07 19:10:32,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:10:47,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:10:50,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:11:00,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:11:04,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:11:06,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:11:23,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:11:26,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.31s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:11:34,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:11:40,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:11:46,785 INFO L124 PetriNetUnfolderBase]: 3125/4332 cut-off events. [2024-02-07 19:11:46,785 INFO L125 PetriNetUnfolderBase]: For 15278/15278 co-relation queries the response was YES. [2024-02-07 19:11:46,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20880 conditions, 4332 events. 3125/4332 cut-off events. For 15278/15278 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19928 event pairs, 367 based on Foata normal form. 19/4334 useless extension candidates. Maximal degree in co-relation 18767. Up to 2383 conditions per place. [2024-02-07 19:11:46,913 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 208 selfloop transitions, 101 changer transitions 28/342 dead transitions. [2024-02-07 19:11:46,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 342 transitions, 2870 flow [2024-02-07 19:11:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-07 19:11:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-07 19:11:46,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 383 transitions. [2024-02-07 19:11:46,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6469594594594594 [2024-02-07 19:11:46,916 INFO L175 Difference]: Start difference. First operand has 73 places, 59 transitions, 413 flow. Second operand 16 states and 383 transitions. [2024-02-07 19:11:46,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 342 transitions, 2870 flow [2024-02-07 19:11:46,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 342 transitions, 2779 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-02-07 19:11:46,937 INFO L231 Difference]: Finished difference. Result has 96 places, 157 transitions, 1655 flow [2024-02-07 19:11:46,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1655, PETRI_PLACES=96, PETRI_TRANSITIONS=157} [2024-02-07 19:11:46,937 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-02-07 19:11:46,938 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 157 transitions, 1655 flow [2024-02-07 19:11:46,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 12.764705882352942) internal successors, (217), 17 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:11:46,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:11:46,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:11:46,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-07 19:11:47,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:11:47,165 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:11:47,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:11:47,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1763719860, now seen corresponding path program 2 times [2024-02-07 19:11:47,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:11:47,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117723630] [2024-02-07 19:11:47,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:11:47,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:11:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:11:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:11:47,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:11:47,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117723630] [2024-02-07 19:11:47,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117723630] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:11:47,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183967250] [2024-02-07 19:11:47,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:11:47,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:11:47,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:11:47,722 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) [2024-02-07 19:11:47,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-07 19:11:48,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:11:48,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:11:48,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-07 19:11:48,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:11:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:11:52,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:11:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:11:53,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183967250] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:11:53,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:11:53,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-02-07 19:11:53,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079382906] [2024-02-07 19:11:53,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:11:53,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 19:11:53,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:11:53,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 19:11:53,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-02-07 19:11:53,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 19:11:53,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 157 transitions, 1655 flow. Second operand has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:11:53,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:11:53,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 19:11:53,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:11:57,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.62s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:12:02,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:12:07,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:12:09,322 INFO L124 PetriNetUnfolderBase]: 4613/6417 cut-off events. [2024-02-07 19:12:09,322 INFO L125 PetriNetUnfolderBase]: For 37048/37048 co-relation queries the response was YES. [2024-02-07 19:12:09,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36827 conditions, 6417 events. 4613/6417 cut-off events. For 37048/37048 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 31298 event pairs, 531 based on Foata normal form. 4/6404 useless extension candidates. Maximal degree in co-relation 36263. Up to 3596 conditions per place. [2024-02-07 19:12:09,380 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 285 selfloop transitions, 59 changer transitions 10/359 dead transitions. [2024-02-07 19:12:09,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 359 transitions, 3828 flow [2024-02-07 19:12:09,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 19:12:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 19:12:09,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 297 transitions. [2024-02-07 19:12:09,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.668918918918919 [2024-02-07 19:12:09,382 INFO L175 Difference]: Start difference. First operand has 96 places, 157 transitions, 1655 flow. Second operand 12 states and 297 transitions. [2024-02-07 19:12:09,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 359 transitions, 3828 flow [2024-02-07 19:12:09,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 359 transitions, 3609 flow, removed 107 selfloop flow, removed 1 redundant places. [2024-02-07 19:12:09,548 INFO L231 Difference]: Finished difference. Result has 113 places, 202 transitions, 2234 flow [2024-02-07 19:12:09,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2234, PETRI_PLACES=113, PETRI_TRANSITIONS=202} [2024-02-07 19:12:09,549 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2024-02-07 19:12:09,549 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 202 transitions, 2234 flow [2024-02-07 19:12:09,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:09,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:09,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:09,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:09,750 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,SelfDestructingSolverStorable11 [2024-02-07 19:12:09,750 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:12:09,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:09,751 INFO L85 PathProgramCache]: Analyzing trace with hash 315827146, now seen corresponding path program 1 times [2024-02-07 19:12:09,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:09,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31637179] [2024-02-07 19:12:09,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:09,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:10,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:10,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31637179] [2024-02-07 19:12:10,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31637179] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:10,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516418049] [2024-02-07 19:12:10,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:10,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:10,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:10,197 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) [2024-02-07 19:12:10,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-07 19:12:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:10,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-07 19:12:10,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:12,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:17,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516418049] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:17,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:17,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-02-07 19:12:17,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318697846] [2024-02-07 19:12:17,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:17,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 19:12:17,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:17,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 19:12:17,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-02-07 19:12:17,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 19:12:17,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 202 transitions, 2234 flow. Second operand has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 14 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:17,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:17,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 19:12:17,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:23,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.96s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:12:27,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:12:30,251 INFO L124 PetriNetUnfolderBase]: 5545/7733 cut-off events. [2024-02-07 19:12:30,251 INFO L125 PetriNetUnfolderBase]: For 53522/53522 co-relation queries the response was YES. [2024-02-07 19:12:30,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46867 conditions, 7733 events. 5545/7733 cut-off events. For 53522/53522 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 39482 event pairs, 477 based on Foata normal form. 2/7718 useless extension candidates. Maximal degree in co-relation 46175. Up to 6464 conditions per place. [2024-02-07 19:12:30,342 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 301 selfloop transitions, 32 changer transitions 9/347 dead transitions. [2024-02-07 19:12:30,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 347 transitions, 3749 flow [2024-02-07 19:12:30,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:12:30,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:12:30,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-02-07 19:12:30,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6972972972972973 [2024-02-07 19:12:30,344 INFO L175 Difference]: Start difference. First operand has 113 places, 202 transitions, 2234 flow. Second operand 10 states and 258 transitions. [2024-02-07 19:12:30,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 347 transitions, 3749 flow [2024-02-07 19:12:30,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 347 transitions, 3614 flow, removed 65 selfloop flow, removed 1 redundant places. [2024-02-07 19:12:30,625 INFO L231 Difference]: Finished difference. Result has 126 places, 228 transitions, 2543 flow [2024-02-07 19:12:30,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2543, PETRI_PLACES=126, PETRI_TRANSITIONS=228} [2024-02-07 19:12:30,626 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-02-07 19:12:30,626 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 228 transitions, 2543 flow [2024-02-07 19:12:30,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 14 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:30,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:30,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:30,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:30,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:30,840 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:12:30,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:30,841 INFO L85 PathProgramCache]: Analyzing trace with hash -31450368, now seen corresponding path program 2 times [2024-02-07 19:12:30,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:30,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265859376] [2024-02-07 19:12:30,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:30,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:31,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:31,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265859376] [2024-02-07 19:12:31,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265859376] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:31,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725957397] [2024-02-07 19:12:31,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:12:31,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:31,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:31,471 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) [2024-02-07 19:12:31,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-07 19:12:31,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:12:31,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:31,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-07 19:12:31,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:13:28,753 WARN L293 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-07 19:13:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:54,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:13:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:59,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725957397] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:13:59,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:13:59,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2024-02-07 19:13:59,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095968407] [2024-02-07 19:13:59,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:13:59,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-07 19:13:59,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:59,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-07 19:13:59,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=175, Unknown=9, NotChecked=0, Total=272 [2024-02-07 19:14:00,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-02-07 19:14:00,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 228 transitions, 2543 flow. Second operand has 17 states, 17 states have (on average 12.647058823529411) internal successors, (215), 17 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:00,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:00,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-02-07 19:14:00,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:22,743 WARN L293 SmtUtils]: Spent 9.51s on a formula simplification. DAG size of input: 86 DAG size of output: 47 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-07 19:14:28,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:14:32,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:14:36,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:14:40,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:14:43,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.84s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:14:55,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:15:00,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:15:05,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:15:13,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:15:17,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:15:24,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:15:27,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:15:30,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:15:34,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:15:36,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:15:40,833 INFO L124 PetriNetUnfolderBase]: 7785/10929 cut-off events. [2024-02-07 19:15:40,833 INFO L125 PetriNetUnfolderBase]: For 79069/79069 co-relation queries the response was YES. [2024-02-07 19:15:40,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66778 conditions, 10929 events. 7785/10929 cut-off events. For 79069/79069 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 59945 event pairs, 545 based on Foata normal form. 39/10951 useless extension candidates. Maximal degree in co-relation 65987. Up to 7687 conditions per place. [2024-02-07 19:15:40,978 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 379 selfloop transitions, 139 changer transitions 11/534 dead transitions. [2024-02-07 19:15:40,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 534 transitions, 5931 flow [2024-02-07 19:15:40,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-07 19:15:40,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-07 19:15:40,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 362 transitions. [2024-02-07 19:15:40,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6988416988416989 [2024-02-07 19:15:40,980 INFO L175 Difference]: Start difference. First operand has 126 places, 228 transitions, 2543 flow. Second operand 14 states and 362 transitions. [2024-02-07 19:15:40,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 534 transitions, 5931 flow [2024-02-07 19:15:41,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 534 transitions, 5766 flow, removed 79 selfloop flow, removed 2 redundant places. [2024-02-07 19:15:41,437 INFO L231 Difference]: Finished difference. Result has 145 places, 336 transitions, 4242 flow [2024-02-07 19:15:41,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2432, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4242, PETRI_PLACES=145, PETRI_TRANSITIONS=336} [2024-02-07 19:15:41,438 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-02-07 19:15:41,438 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 336 transitions, 4242 flow [2024-02-07 19:15:41,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 12.647058823529411) internal successors, (215), 17 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:15:41,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:15:41,439 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:15:41,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-02-07 19:15:41,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:15:41,651 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:15:41,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:15:41,661 INFO L85 PathProgramCache]: Analyzing trace with hash -700755095, now seen corresponding path program 3 times [2024-02-07 19:15:41,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:15:41,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478796738] [2024-02-07 19:15:41,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:15:41,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:15:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:15:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:15:41,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:15:41,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478796738] [2024-02-07 19:15:41,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478796738] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:15:41,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935936374] [2024-02-07 19:15:41,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 19:15:41,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:15:41,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:15:41,829 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) [2024-02-07 19:15:41,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-07 19:15:42,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-07 19:15:42,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:15:42,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 19:15:42,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:16:19,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:16:19,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:17:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:17:04,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935936374] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:17:04,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:17:04,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 16 [2024-02-07 19:17:04,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416355108] [2024-02-07 19:17:04,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:17:04,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 19:17:04,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:17:04,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 19:17:04,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=166, Unknown=17, NotChecked=0, Total=240 [2024-02-07 19:17:08,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:17:08,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-02-07 19:17:08,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 336 transitions, 4242 flow. Second operand has 16 states, 16 states have (on average 13.25) internal successors, (212), 16 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:17:08,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:17:08,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-02-07 19:17:08,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:17:12,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:17:34,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:17:39,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.64s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:17:43,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:17:47,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:17:51,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:18:30,985 WARN L293 SmtUtils]: Spent 20.11s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-07 19:18:34,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.47s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:18:38,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:18:43,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:18:46,123 INFO L124 PetriNetUnfolderBase]: 12313/16997 cut-off events. [2024-02-07 19:18:46,124 INFO L125 PetriNetUnfolderBase]: For 186645/186645 co-relation queries the response was YES. [2024-02-07 19:18:46,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115460 conditions, 16997 events. 12313/16997 cut-off events. For 186645/186645 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 92683 event pairs, 221 based on Foata normal form. 250/17234 useless extension candidates. Maximal degree in co-relation 114577. Up to 5452 conditions per place. [2024-02-07 19:18:46,489 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 721 selfloop transitions, 348 changer transitions 44/1118 dead transitions. [2024-02-07 19:18:46,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 1118 transitions, 14819 flow [2024-02-07 19:18:46,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-07 19:18:46,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-07 19:18:46,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 629 transitions. [2024-02-07 19:18:46,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-02-07 19:18:46,495 INFO L175 Difference]: Start difference. First operand has 145 places, 336 transitions, 4242 flow. Second operand 28 states and 629 transitions. [2024-02-07 19:18:46,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 1118 transitions, 14819 flow [2024-02-07 19:18:47,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 1118 transitions, 14062 flow, removed 367 selfloop flow, removed 3 redundant places. [2024-02-07 19:18:47,503 INFO L231 Difference]: Finished difference. Result has 184 places, 572 transitions, 8533 flow [2024-02-07 19:18:47,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3832, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=8533, PETRI_PLACES=184, PETRI_TRANSITIONS=572} [2024-02-07 19:18:47,505 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 143 predicate places. [2024-02-07 19:18:47,505 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 572 transitions, 8533 flow [2024-02-07 19:18:47,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.25) internal successors, (212), 16 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:18:47,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:47,506 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:18:47,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-07 19:18:47,721 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,SelfDestructingSolverStorable14 [2024-02-07 19:18:47,722 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:18:47,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:47,722 INFO L85 PathProgramCache]: Analyzing trace with hash -100452375, now seen corresponding path program 4 times [2024-02-07 19:18:47,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:47,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921354940] [2024-02-07 19:18:47,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:47,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:18:47,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:47,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921354940] [2024-02-07 19:18:47,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921354940] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:18:47,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201060526] [2024-02-07 19:18:47,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 19:18:47,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:18:47,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:18:47,840 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) [2024-02-07 19:18:47,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-07 19:18:47,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 19:18:47,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:18:47,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 19:18:47,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:18:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:18:57,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:19:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:19:01,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201060526] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:19:01,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:19:01,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-02-07 19:19:01,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758635532] [2024-02-07 19:19:01,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:19:01,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 19:19:01,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:19:01,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 19:19:01,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=99, Unknown=3, NotChecked=0, Total=132 [2024-02-07 19:19:05,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:19:05,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-02-07 19:19:05,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 572 transitions, 8533 flow. Second operand has 12 states, 12 states have (on average 14.083333333333334) internal successors, (169), 12 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:19:05,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:19:05,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-02-07 19:19:05,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:19:07,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:19:29,931 WARN L293 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 38 DAG size of output: 35 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-07 19:19:33,967 INFO L124 PetriNetUnfolderBase]: 14384/19982 cut-off events. [2024-02-07 19:19:33,967 INFO L125 PetriNetUnfolderBase]: For 394798/394856 co-relation queries the response was YES. [2024-02-07 19:19:34,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163073 conditions, 19982 events. 14384/19982 cut-off events. For 394798/394856 co-relation queries the response was YES. Maximal size of possible extension queue 937. Compared 112735 event pairs, 717 based on Foata normal form. 290/20217 useless extension candidates. Maximal degree in co-relation 161882. Up to 7115 conditions per place. [2024-02-07 19:19:34,432 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 794 selfloop transitions, 164 changer transitions 11/974 dead transitions. [2024-02-07 19:19:34,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 974 transitions, 16214 flow [2024-02-07 19:19:34,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-07 19:19:34,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-07 19:19:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 316 transitions. [2024-02-07 19:19:34,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61003861003861 [2024-02-07 19:19:34,434 INFO L175 Difference]: Start difference. First operand has 184 places, 572 transitions, 8533 flow. Second operand 14 states and 316 transitions. [2024-02-07 19:19:34,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 974 transitions, 16214 flow [2024-02-07 19:19:38,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 974 transitions, 15345 flow, removed 416 selfloop flow, removed 6 redundant places. [2024-02-07 19:19:38,548 INFO L231 Difference]: Finished difference. Result has 201 places, 614 transitions, 9277 flow [2024-02-07 19:19:38,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=7729, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9277, PETRI_PLACES=201, PETRI_TRANSITIONS=614} [2024-02-07 19:19:38,549 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-02-07 19:19:38,549 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 614 transitions, 9277 flow [2024-02-07 19:19:38,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.083333333333334) internal successors, (169), 12 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:19:38,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:19:38,550 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:19:38,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-02-07 19:19:38,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-02-07 19:19:38,754 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:19:38,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:19:38,756 INFO L85 PathProgramCache]: Analyzing trace with hash 518433123, now seen corresponding path program 5 times [2024-02-07 19:19:38,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:19:38,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886724162] [2024-02-07 19:19:38,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:19:38,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:19:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:19:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:19:38,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:19:38,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886724162] [2024-02-07 19:19:38,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886724162] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:19:38,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498945576] [2024-02-07 19:19:38,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 19:19:38,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:19:38,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:19:38,889 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) [2024-02-07 19:19:38,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-07 19:19:39,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:19:39,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:19:39,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-07 19:19:39,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:19:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:19:42,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:19:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:19:44,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498945576] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:19:44,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:19:44,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 16 [2024-02-07 19:19:44,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400563760] [2024-02-07 19:19:44,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:19:44,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 19:19:44,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:19:44,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 19:19:44,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-02-07 19:19:44,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 19:19:44,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 614 transitions, 9277 flow. Second operand has 16 states, 16 states have (on average 14.25) internal successors, (228), 16 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:19:44,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:19:44,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 19:19:44,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:19:52,433 INFO L124 PetriNetUnfolderBase]: 14298/19895 cut-off events. [2024-02-07 19:19:52,433 INFO L125 PetriNetUnfolderBase]: For 453494/453494 co-relation queries the response was YES. [2024-02-07 19:19:52,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165461 conditions, 19895 events. 14298/19895 cut-off events. For 453494/453494 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 112718 event pairs, 425 based on Foata normal form. 96/19978 useless extension candidates. Maximal degree in co-relation 164229. Up to 7019 conditions per place. [2024-02-07 19:19:52,697 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 818 selfloop transitions, 161 changer transitions 44/1028 dead transitions. [2024-02-07 19:19:52,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 1028 transitions, 16471 flow [2024-02-07 19:19:52,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-07 19:19:52,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-07 19:19:52,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 390 transitions. [2024-02-07 19:19:52,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6200317965023847 [2024-02-07 19:19:52,700 INFO L175 Difference]: Start difference. First operand has 201 places, 614 transitions, 9277 flow. Second operand 17 states and 390 transitions. [2024-02-07 19:19:52,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 1028 transitions, 16471 flow [2024-02-07 19:19:56,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 1028 transitions, 15995 flow, removed 168 selfloop flow, removed 3 redundant places. [2024-02-07 19:19:56,168 INFO L231 Difference]: Finished difference. Result has 218 places, 629 transitions, 9585 flow [2024-02-07 19:19:56,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=8828, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9585, PETRI_PLACES=218, PETRI_TRANSITIONS=629} [2024-02-07 19:19:56,169 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-02-07 19:19:56,169 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 629 transitions, 9585 flow [2024-02-07 19:19:56,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.25) internal successors, (228), 16 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:19:56,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:19:56,170 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:19:56,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-07 19:19:56,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-07 19:19:56,382 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:19:56,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:19:56,382 INFO L85 PathProgramCache]: Analyzing trace with hash 961447403, now seen corresponding path program 3 times [2024-02-07 19:19:56,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:19:56,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271637934] [2024-02-07 19:19:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:19:56,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:19:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:19:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:19:56,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:19:56,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271637934] [2024-02-07 19:19:56,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271637934] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:19:56,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170210041] [2024-02-07 19:19:56,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 19:19:56,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:19:56,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:19:56,495 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) [2024-02-07 19:19:56,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-07 19:19:57,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 19:19:57,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:19:57,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-07 19:19:57,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:19:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:19:57,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:20:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:01,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170210041] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:20:01,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:20:01,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 16 [2024-02-07 19:20:01,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796817838] [2024-02-07 19:20:01,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:20:01,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 19:20:01,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:01,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 19:20:01,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-02-07 19:20:01,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 19:20:01,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 629 transitions, 9585 flow. Second operand has 16 states, 16 states have (on average 13.9375) internal successors, (223), 16 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:20:01,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:01,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 19:20:01,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:11,189 INFO L124 PetriNetUnfolderBase]: 26262/36672 cut-off events. [2024-02-07 19:20:11,190 INFO L125 PetriNetUnfolderBase]: For 1056914/1056914 co-relation queries the response was YES. [2024-02-07 19:20:11,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336322 conditions, 36672 events. 26262/36672 cut-off events. For 1056914/1056914 co-relation queries the response was YES. Maximal size of possible extension queue 1558. Compared 225394 event pairs, 2185 based on Foata normal form. 1594/38249 useless extension candidates. Maximal degree in co-relation 334446. Up to 12045 conditions per place. [2024-02-07 19:20:12,276 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 1072 selfloop transitions, 331 changer transitions 6/1414 dead transitions. [2024-02-07 19:20:12,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 1414 transitions, 23676 flow [2024-02-07 19:20:12,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-07 19:20:12,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-07 19:20:12,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 408 transitions. [2024-02-07 19:20:12,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6891891891891891 [2024-02-07 19:20:12,281 INFO L175 Difference]: Start difference. First operand has 218 places, 629 transitions, 9585 flow. Second operand 16 states and 408 transitions. [2024-02-07 19:20:12,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 1414 transitions, 23676 flow [2024-02-07 19:20:20,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 1414 transitions, 23063 flow, removed 286 selfloop flow, removed 5 redundant places. [2024-02-07 19:20:20,201 INFO L231 Difference]: Finished difference. Result has 239 places, 747 transitions, 12993 flow [2024-02-07 19:20:20,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=9265, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=12993, PETRI_PLACES=239, PETRI_TRANSITIONS=747} [2024-02-07 19:20:20,202 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-02-07 19:20:20,202 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 747 transitions, 12993 flow [2024-02-07 19:20:20,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.9375) internal successors, (223), 16 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:20:20,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:20,203 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:20:20,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-07 19:20:20,415 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,SelfDestructingSolverStorable17 [2024-02-07 19:20:20,415 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:20:20,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:20,416 INFO L85 PathProgramCache]: Analyzing trace with hash -992436538, now seen corresponding path program 4 times [2024-02-07 19:20:20,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:20,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802845870] [2024-02-07 19:20:20,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:20,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:20,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:20,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802845870] [2024-02-07 19:20:20,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802845870] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:20:20,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205329059] [2024-02-07 19:20:20,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 19:20:20,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:20:20,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:20:20,574 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) [2024-02-07 19:20:20,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-07 19:20:20,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 19:20:20,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:20:20,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-07 19:20:20,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:20:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:22,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:20:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:22,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205329059] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:20:22,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:20:22,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 16 [2024-02-07 19:20:22,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746989929] [2024-02-07 19:20:22,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:20:22,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 19:20:22,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:22,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 19:20:22,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-02-07 19:20:22,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 19:20:22,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 747 transitions, 12993 flow. Second operand has 16 states, 16 states have (on average 14.125) internal successors, (226), 16 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:20:22,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:22,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 19:20:22,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:32,939 INFO L124 PetriNetUnfolderBase]: 22814/31570 cut-off events. [2024-02-07 19:20:32,939 INFO L125 PetriNetUnfolderBase]: For 1075408/1075408 co-relation queries the response was YES. [2024-02-07 19:20:33,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306864 conditions, 31570 events. 22814/31570 cut-off events. For 1075408/1075408 co-relation queries the response was YES. Maximal size of possible extension queue 1425. Compared 189313 event pairs, 1259 based on Foata normal form. 628/32191 useless extension candidates. Maximal degree in co-relation 305408. Up to 11319 conditions per place. [2024-02-07 19:20:33,935 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 1234 selfloop transitions, 284 changer transitions 60/1583 dead transitions. [2024-02-07 19:20:33,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 1583 transitions, 27530 flow [2024-02-07 19:20:33,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-07 19:20:33,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-07 19:20:33,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 361 transitions. [2024-02-07 19:20:33,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504504504504505 [2024-02-07 19:20:33,937 INFO L175 Difference]: Start difference. First operand has 239 places, 747 transitions, 12993 flow. Second operand 15 states and 361 transitions. [2024-02-07 19:20:33,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 1583 transitions, 27530 flow [2024-02-07 19:20:42,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 1583 transitions, 26865 flow, removed 317 selfloop flow, removed 5 redundant places. [2024-02-07 19:20:42,684 INFO L231 Difference]: Finished difference. Result has 252 places, 767 transitions, 13815 flow [2024-02-07 19:20:42,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=12293, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=13815, PETRI_PLACES=252, PETRI_TRANSITIONS=767} [2024-02-07 19:20:42,685 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 211 predicate places. [2024-02-07 19:20:42,686 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 767 transitions, 13815 flow [2024-02-07 19:20:42,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.125) internal successors, (226), 16 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:20:42,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:42,687 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:20:42,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-07 19:20:42,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:20:42,900 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:20:42,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:42,900 INFO L85 PathProgramCache]: Analyzing trace with hash 862319966, now seen corresponding path program 5 times [2024-02-07 19:20:42,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:42,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948262955] [2024-02-07 19:20:42,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:42,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:42,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:42,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948262955] [2024-02-07 19:20:42,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948262955] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:20:42,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887357447] [2024-02-07 19:20:42,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 19:20:42,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:20:42,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:20:43,013 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:20:43,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-07 19:20:43,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-07 19:20:43,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:20:43,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 19:20:43,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:20:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:43,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:20:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:43,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887357447] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:20:43,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:20:43,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-02-07 19:20:43,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264792992] [2024-02-07 19:20:43,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:20:43,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 19:20:43,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:43,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 19:20:43,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-02-07 19:20:43,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 19:20:43,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 767 transitions, 13815 flow. Second operand has 12 states, 12 states have (on average 14.416666666666666) internal successors, (173), 12 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:20:43,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:43,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 19:20:43,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:54,532 INFO L124 PetriNetUnfolderBase]: 27518/38057 cut-off events. [2024-02-07 19:20:54,532 INFO L125 PetriNetUnfolderBase]: For 1361081/1361161 co-relation queries the response was YES. [2024-02-07 19:20:55,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388155 conditions, 38057 events. 27518/38057 cut-off events. For 1361081/1361161 co-relation queries the response was YES. Maximal size of possible extension queue 1610. Compared 230518 event pairs, 3587 based on Foata normal form. 788/38824 useless extension candidates. Maximal degree in co-relation 386505. Up to 14988 conditions per place. [2024-02-07 19:20:55,727 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 1395 selfloop transitions, 370 changer transitions 0/1770 dead transitions. [2024-02-07 19:20:55,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 1770 transitions, 32687 flow [2024-02-07 19:20:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 19:20:55,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 19:20:55,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 289 transitions. [2024-02-07 19:20:55,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6509009009009009 [2024-02-07 19:20:55,729 INFO L175 Difference]: Start difference. First operand has 252 places, 767 transitions, 13815 flow. Second operand 12 states and 289 transitions. [2024-02-07 19:20:55,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 1770 transitions, 32687 flow [2024-02-07 19:21:10,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 1770 transitions, 32350 flow, removed 160 selfloop flow, removed 4 redundant places. [2024-02-07 19:21:10,541 INFO L231 Difference]: Finished difference. Result has 263 places, 840 transitions, 16227 flow [2024-02-07 19:21:10,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=13560, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16227, PETRI_PLACES=263, PETRI_TRANSITIONS=840} [2024-02-07 19:21:10,543 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 222 predicate places. [2024-02-07 19:21:10,543 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 840 transitions, 16227 flow [2024-02-07 19:21:10,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.416666666666666) internal successors, (173), 12 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:21:10,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:21:10,543 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:21:10,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-07 19:21:10,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-02-07 19:21:10,755 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:21:10,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:21:10,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1489431977, now seen corresponding path program 6 times [2024-02-07 19:21:10,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:21:10,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338535429] [2024-02-07 19:21:10,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:21:10,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:21:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:21:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:21:10,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:21:10,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338535429] [2024-02-07 19:21:10,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338535429] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:21:10,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171611230] [2024-02-07 19:21:10,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 19:21:10,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:21:10,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:21:10,895 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:21:10,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-07 19:21:11,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-07 19:21:11,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:21:11,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-07 19:21:11,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:21:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:21:16,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:21:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:21:17,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171611230] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:21:17,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:21:17,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 17 [2024-02-07 19:21:17,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989199688] [2024-02-07 19:21:17,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:21:17,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-07 19:21:17,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:21:17,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-07 19:21:17,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=206, Unknown=1, NotChecked=0, Total=272 [2024-02-07 19:21:17,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-02-07 19:21:17,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 840 transitions, 16227 flow. Second operand has 17 states, 17 states have (on average 12.823529411764707) internal successors, (218), 17 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:21:17,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:21:17,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-02-07 19:21:17,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:21:22,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-07 19:21:28,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:21:51,326 INFO L124 PetriNetUnfolderBase]: 39489/54760 cut-off events. [2024-02-07 19:21:51,327 INFO L125 PetriNetUnfolderBase]: For 2219224/2219224 co-relation queries the response was YES. [2024-02-07 19:21:52,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580681 conditions, 54760 events. 39489/54760 cut-off events. For 2219224/2219224 co-relation queries the response was YES. Maximal size of possible extension queue 2230. Compared 346081 event pairs, 4115 based on Foata normal form. 616/55359 useless extension candidates. Maximal degree in co-relation 578475. Up to 27990 conditions per place. [2024-02-07 19:21:53,103 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 1187 selfloop transitions, 383 changer transitions 6/1581 dead transitions. [2024-02-07 19:21:53,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 1581 transitions, 30396 flow [2024-02-07 19:21:53,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-07 19:21:53,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-07 19:21:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 387 transitions. [2024-02-07 19:21:53,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6537162162162162 [2024-02-07 19:21:53,104 INFO L175 Difference]: Start difference. First operand has 263 places, 840 transitions, 16227 flow. Second operand 16 states and 387 transitions. [2024-02-07 19:21:53,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 1581 transitions, 30396 flow [2024-02-07 19:22:14,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 1581 transitions, 29146 flow, removed 369 selfloop flow, removed 5 redundant places. [2024-02-07 19:22:14,077 INFO L231 Difference]: Finished difference. Result has 282 places, 951 transitions, 19318 flow [2024-02-07 19:22:14,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=14796, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=19318, PETRI_PLACES=282, PETRI_TRANSITIONS=951} [2024-02-07 19:22:14,078 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 241 predicate places. [2024-02-07 19:22:14,078 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 951 transitions, 19318 flow [2024-02-07 19:22:14,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 12.823529411764707) internal successors, (218), 17 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:14,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:14,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:22:14,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-02-07 19:22:14,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:22:14,291 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 19:22:14,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:14,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1878035739, now seen corresponding path program 7 times [2024-02-07 19:22:14,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:14,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141058507] [2024-02-07 19:22:14,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:14,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:14,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:14,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141058507] [2024-02-07 19:22:14,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141058507] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:22:14,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658891025] [2024-02-07 19:22:14,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 19:22:14,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:22:14,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:22:14,384 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:22:14,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-07 19:22:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:14,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 19:22:14,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:22:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:14,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:22:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:22:15,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658891025] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:22:15,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:22:15,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-02-07 19:22:15,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692088617] [2024-02-07 19:22:15,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:22:15,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 19:22:15,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:15,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 19:22:15,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-02-07 19:22:15,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 19:22:15,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 951 transitions, 19318 flow. Second operand has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:22:15,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:15,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 19:22:15,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:17,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:22:21,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15