./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-easy1.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/test-easy1.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 958ec4d9 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/test-easy1.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/test-easy1.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-dev-958ec4d-m [2024-02-07 14:43:02,382 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:43:02,481 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:43:02,484 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:43:02,485 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:43:02,509 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:43:02,509 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:43:02,510 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:43:02,510 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:43:02,513 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:43:02,514 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:43:02,514 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:43:02,515 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:43:02,516 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:43:02,516 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:43:02,516 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:43:02,516 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:43:02,517 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:43:02,517 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:43:02,517 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:43:02,517 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:43:02,517 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:43:02,518 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:43:02,518 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:43:02,518 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:43:02,518 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:43:02,518 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:43:02,518 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:43:02,519 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:43:02,519 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:43:02,520 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:43:02,520 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:43:02,520 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:43:02,520 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:43:02,521 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:43:02,521 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:43:02,521 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:43:02,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:43:02,521 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:43:02,521 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:43:02,521 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:43:02,522 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:43:02,522 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:43:02,522 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:43:02,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:43:02,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:43:02,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:43:02,720 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:43:02,721 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:43:02,721 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy1.wvr.c [2024-02-07 14:43:03,815 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:43:03,982 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:43:03,983 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c [2024-02-07 14:43:03,994 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d484cd9ba/4cb929e8859f4ac9a55de821b552d8d2/FLAGa5ae7cdf1 [2024-02-07 14:43:04,008 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d484cd9ba/4cb929e8859f4ac9a55de821b552d8d2 [2024-02-07 14:43:04,010 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:43:04,010 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:43:04,013 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/test-easy1.wvr.yml/witness.yml [2024-02-07 14:43:04,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:43:04,070 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:43:04,071 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:43:04,071 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:43:04,074 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:43:04,075 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:43:04" (1/2) ... [2024-02-07 14:43:04,075 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c6f0a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:43:04, skipping insertion in model container [2024-02-07 14:43:04,076 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:43:04" (1/2) ... [2024-02-07 14:43:04,077 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3c2d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:43:04, skipping insertion in model container [2024-02-07 14:43:04,077 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:43:04" (2/2) ... [2024-02-07 14:43:04,078 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c6f0a46 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:43:04, skipping insertion in model container [2024-02-07 14:43:04,078 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:43:04" (2/2) ... [2024-02-07 14:43:04,078 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:43:04,091 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:43:04,092 INFO L76 edCorrectnessWitness]: Location invariant before [L59-L59] ((((0LL - (long long )x1) + (long long )x2 >= 0LL) && ((long long )x1 + (long long )x2 >= 0LL)) && ((0LL - (long long )x1) - (long long )x2 >= 0LL)) && ((long long )x1 - (long long )x2 >= 0LL) [2024-02-07 14:43:04,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:43:04,241 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/test-easy1.wvr.c[1902,1915] [2024-02-07 14:43:04,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:43:04,252 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local [2024-02-07 14:43:04,286 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/test-easy1.wvr.c[1902,1915] [2024-02-07 14:43:04,287 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:43:04,299 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:43:04,299 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:43:04 WrapperNode [2024-02-07 14:43:04,299 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:43:04,301 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:43:04,301 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:43:04,301 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:43:04,306 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 02:43:04" (1/1) ... [2024-02-07 14:43:04,319 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 02:43:04" (1/1) ... [2024-02-07 14:43:04,331 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2024-02-07 14:43:04,331 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:43:04,332 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:43:04,332 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:43:04,332 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:43:04,341 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 02:43:04" (1/1) ... [2024-02-07 14:43:04,341 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 02:43:04" (1/1) ... [2024-02-07 14:43:04,343 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 02:43:04" (1/1) ... [2024-02-07 14:43:04,352 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-02-07 14:43:04,352 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 02:43:04" (1/1) ... [2024-02-07 14:43:04,352 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 02:43:04" (1/1) ... [2024-02-07 14:43:04,355 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 02:43:04" (1/1) ... [2024-02-07 14:43:04,359 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 02:43:04" (1/1) ... [2024-02-07 14:43:04,359 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 02:43:04" (1/1) ... [2024-02-07 14:43:04,360 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 02:43:04" (1/1) ... [2024-02-07 14:43:04,361 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:43:04,362 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:43:04,362 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:43:04,362 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:43:04,363 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 02:43:04" (1/1) ... [2024-02-07 14:43:04,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:43:04,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:04,443 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 14:43:04,485 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 14:43:04,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:43:04,499 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 14:43:04,500 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 14:43:04,500 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 14:43:04,500 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 14:43:04,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:43:04,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:43:04,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:43:04,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:43:04,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:43:04,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:43:04,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:43:04,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:43:04,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:43:04,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:43:04,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:43:04,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:43:04,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:43:04,503 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 14:43:04,580 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:43:04,582 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:43:04,714 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:43:04,714 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:43:04,803 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:43:04,803 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-07 14:43:04,814 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:43:04 BoogieIcfgContainer [2024-02-07 14:43:04,814 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:43:04,816 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:43:04,816 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:43:04,818 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:43:04,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:43:04" (1/4) ... [2024-02-07 14:43:04,819 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb7d8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:43:04, skipping insertion in model container [2024-02-07 14:43:04,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:43:04" (2/4) ... [2024-02-07 14:43:04,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb7d8f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:43:04, skipping insertion in model container [2024-02-07 14:43:04,820 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 02:43:04" (3/4) ... [2024-02-07 14:43:04,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb7d8f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:43:04, skipping insertion in model container [2024-02-07 14:43:04,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:43:04" (4/4) ... [2024-02-07 14:43:04,821 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2024-02-07 14:43:04,834 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:43:04,834 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-02-07 14:43:04,834 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:43:04,868 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 14:43:04,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-02-07 14:43:04,910 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-02-07 14:43:04,910 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 14:43:04,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-02-07 14:43:04,913 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-02-07 14:43:04,915 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-02-07 14:43:04,927 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:43:04,932 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;@1cb361d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:43:04,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-02-07 14:43:04,937 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:43:04,938 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 14:43:04,938 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:43:04,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:04,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 14:43:04,940 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:04,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:04,946 INFO L85 PathProgramCache]: Analyzing trace with hash 7030, now seen corresponding path program 1 times [2024-02-07 14:43:04,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:04,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185654675] [2024-02-07 14:43:04,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:04,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:05,249 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 14:43:05,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:05,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185654675] [2024-02-07 14:43:05,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185654675] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:05,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:05,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:43:05,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420004132] [2024-02-07 14:43:05,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:05,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:43:05,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:05,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:43:05,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:43:05,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-02-07 14:43:05,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 14:43:05,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:05,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-02-07 14:43:05,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:05,379 INFO L124 PetriNetUnfolderBase]: 48/83 cut-off events. [2024-02-07 14:43:05,380 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-07 14:43:05,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 83 events. 48/83 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 184 event pairs, 19 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 129. Up to 79 conditions per place. [2024-02-07 14:43:05,385 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 12 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2024-02-07 14:43:05,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 17 transitions, 74 flow [2024-02-07 14:43:05,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:43:05,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:43:05,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 30 transitions. [2024-02-07 14:43:05,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-02-07 14:43:05,396 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 3 states and 30 transitions. [2024-02-07 14:43:05,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 17 transitions, 74 flow [2024-02-07 14:43:05,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 17 transitions, 66 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 14:43:05,402 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 42 flow [2024-02-07 14:43:05,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2024-02-07 14:43:05,407 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2024-02-07 14:43:05,408 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 42 flow [2024-02-07 14:43:05,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 14:43:05,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:05,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:05,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:43:05,409 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:05,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:05,411 INFO L85 PathProgramCache]: Analyzing trace with hash 987989447, now seen corresponding path program 1 times [2024-02-07 14:43:05,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:05,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090057888] [2024-02-07 14:43:05,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:05,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:05,573 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 14:43:05,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:05,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090057888] [2024-02-07 14:43:05,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090057888] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:05,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:05,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:43:05,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084056346] [2024-02-07 14:43:05,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:05,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:43:05,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:05,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:43:05,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:43:05,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:05,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:43:05,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:05,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:05,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:05,630 INFO L124 PetriNetUnfolderBase]: 65/116 cut-off events. [2024-02-07 14:43:05,630 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 14:43:05,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 116 events. 65/116 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 316 event pairs, 9 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 229. Up to 85 conditions per place. [2024-02-07 14:43:05,633 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 20 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2024-02-07 14:43:05,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 27 transitions, 113 flow [2024-02-07 14:43:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:43:05,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:43:05,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2024-02-07 14:43:05,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6825396825396826 [2024-02-07 14:43:05,635 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 42 flow. Second operand 3 states and 43 transitions. [2024-02-07 14:43:05,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 27 transitions, 113 flow [2024-02-07 14:43:05,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 27 transitions, 109 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:05,637 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 57 flow [2024-02-07 14:43:05,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2024-02-07 14:43:05,639 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -2 predicate places. [2024-02-07 14:43:05,640 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 57 flow [2024-02-07 14:43:05,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:43:05,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:05,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:05,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:43:05,646 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:05,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:05,649 INFO L85 PathProgramCache]: Analyzing trace with hash 774846822, now seen corresponding path program 1 times [2024-02-07 14:43:05,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:05,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49043033] [2024-02-07 14:43:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:05,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:05,729 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 14:43:05,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:05,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49043033] [2024-02-07 14:43:05,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49043033] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:05,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:05,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:43:05,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850433918] [2024-02-07 14:43:05,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:05,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:05,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:05,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:05,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:43:05,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:05,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 14:43:05,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:05,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:05,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:05,790 INFO L124 PetriNetUnfolderBase]: 70/134 cut-off events. [2024-02-07 14:43:05,791 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-02-07 14:43:05,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 134 events. 70/134 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 400 event pairs, 9 based on Foata normal form. 4/132 useless extension candidates. Maximal degree in co-relation 121. Up to 68 conditions per place. [2024-02-07 14:43:05,792 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 28 selfloop transitions, 7 changer transitions 0/38 dead transitions. [2024-02-07 14:43:05,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 38 transitions, 181 flow [2024-02-07 14:43:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:43:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:43:05,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-02-07 14:43:05,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-02-07 14:43:05,795 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 57 flow. Second operand 5 states and 63 transitions. [2024-02-07 14:43:05,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 38 transitions, 181 flow [2024-02-07 14:43:05,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 38 transitions, 177 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:43:05,797 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 110 flow [2024-02-07 14:43:05,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2024-02-07 14:43:05,798 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 4 predicate places. [2024-02-07 14:43:05,799 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 110 flow [2024-02-07 14:43:05,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 14:43:05,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:05,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:05,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:43:05,799 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:05,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:05,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1402927602, now seen corresponding path program 2 times [2024-02-07 14:43:05,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:05,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337470325] [2024-02-07 14:43:05,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:05,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:05,851 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 14:43:05,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:05,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337470325] [2024-02-07 14:43:05,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337470325] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:05,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427189658] [2024-02-07 14:43:05,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:43:05,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:05,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:05,877 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 14:43:05,890 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 14:43:05,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:43:05,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:05,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:43:05,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:06,065 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 14:43:06,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:06,149 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 14:43:06,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427189658] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:06,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 14:43:06,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 9 [2024-02-07 14:43:06,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560177399] [2024-02-07 14:43:06,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:06,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:43:06,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:06,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:43:06,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:43:06,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:06,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 14:43:06,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:06,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:06,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:06,242 INFO L124 PetriNetUnfolderBase]: 103/209 cut-off events. [2024-02-07 14:43:06,242 INFO L125 PetriNetUnfolderBase]: For 199/199 co-relation queries the response was YES. [2024-02-07 14:43:06,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 663 conditions, 209 events. 103/209 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 784 event pairs, 15 based on Foata normal form. 2/205 useless extension candidates. Maximal degree in co-relation 338. Up to 73 conditions per place. [2024-02-07 14:43:06,244 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 33 selfloop transitions, 13 changer transitions 6/55 dead transitions. [2024-02-07 14:43:06,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 55 transitions, 338 flow [2024-02-07 14:43:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:43:06,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:43:06,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2024-02-07 14:43:06,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6952380952380952 [2024-02-07 14:43:06,245 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 110 flow. Second operand 5 states and 73 transitions. [2024-02-07 14:43:06,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 55 transitions, 338 flow [2024-02-07 14:43:06,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 55 transitions, 338 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:43:06,248 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 209 flow [2024-02-07 14:43:06,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=209, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2024-02-07 14:43:06,249 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 12 predicate places. [2024-02-07 14:43:06,249 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 209 flow [2024-02-07 14:43:06,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 14:43:06,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:06,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:06,279 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 14:43:06,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:06,462 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:06,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:06,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1754916691, now seen corresponding path program 1 times [2024-02-07 14:43:06,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:06,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170025114] [2024-02-07 14:43:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:06,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:06,503 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 14:43:06,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:06,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170025114] [2024-02-07 14:43:06,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170025114] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:06,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:06,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:43:06,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400388167] [2024-02-07 14:43:06,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:06,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:06,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:06,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:06,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:43:06,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:06,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 14:43:06,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:06,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:06,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:06,559 INFO L124 PetriNetUnfolderBase]: 92/195 cut-off events. [2024-02-07 14:43:06,559 INFO L125 PetriNetUnfolderBase]: For 616/616 co-relation queries the response was YES. [2024-02-07 14:43:06,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 195 events. 92/195 cut-off events. For 616/616 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 716 event pairs, 8 based on Foata normal form. 8/200 useless extension candidates. Maximal degree in co-relation 347. Up to 66 conditions per place. [2024-02-07 14:43:06,561 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 38 selfloop transitions, 11 changer transitions 4/56 dead transitions. [2024-02-07 14:43:06,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 56 transitions, 456 flow [2024-02-07 14:43:06,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:43:06,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:43:06,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2024-02-07 14:43:06,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-02-07 14:43:06,563 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 209 flow. Second operand 5 states and 67 transitions. [2024-02-07 14:43:06,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 56 transitions, 456 flow [2024-02-07 14:43:06,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 432 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-02-07 14:43:06,599 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 292 flow [2024-02-07 14:43:06,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=292, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2024-02-07 14:43:06,600 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 18 predicate places. [2024-02-07 14:43:06,600 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 292 flow [2024-02-07 14:43:06,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 14:43:06,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:06,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:06,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:43:06,601 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:06,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:06,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1944751461, now seen corresponding path program 2 times [2024-02-07 14:43:06,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:06,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703599594] [2024-02-07 14:43:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:06,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:06,636 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 14:43:06,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:06,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703599594] [2024-02-07 14:43:06,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703599594] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:06,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:06,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:43:06,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894057039] [2024-02-07 14:43:06,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:06,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:06,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:06,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:06,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:43:06,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:06,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 292 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 14:43:06,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:06,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:06,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:06,694 INFO L124 PetriNetUnfolderBase]: 75/163 cut-off events. [2024-02-07 14:43:06,694 INFO L125 PetriNetUnfolderBase]: For 652/652 co-relation queries the response was YES. [2024-02-07 14:43:06,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757 conditions, 163 events. 75/163 cut-off events. For 652/652 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 515 event pairs, 14 based on Foata normal form. 8/169 useless extension candidates. Maximal degree in co-relation 549. Up to 138 conditions per place. [2024-02-07 14:43:06,696 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 28 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2024-02-07 14:43:06,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 361 flow [2024-02-07 14:43:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:43:06,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:43:06,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 48 transitions. [2024-02-07 14:43:06,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-02-07 14:43:06,697 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 292 flow. Second operand 4 states and 48 transitions. [2024-02-07 14:43:06,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 361 flow [2024-02-07 14:43:06,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 352 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-02-07 14:43:06,701 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 292 flow [2024-02-07 14:43:06,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=292, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2024-02-07 14:43:06,703 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 21 predicate places. [2024-02-07 14:43:06,703 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 292 flow [2024-02-07 14:43:06,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 14:43:06,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:06,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:06,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 14:43:06,704 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:06,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:06,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1422615368, now seen corresponding path program 1 times [2024-02-07 14:43:06,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:06,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085721440] [2024-02-07 14:43:06,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:06,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:06,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:06,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085721440] [2024-02-07 14:43:06,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085721440] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:06,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396281055] [2024-02-07 14:43:06,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:06,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:06,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:06,844 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 14:43:06,878 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 14:43:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:06,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:43:06,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:07,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:07,103 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 14:43:07,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396281055] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:07,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:07,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-02-07 14:43:07,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338497457] [2024-02-07 14:43:07,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:07,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:43:07,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:07,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:43:07,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:43:07,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:07,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 292 flow. Second operand has 13 states, 13 states have (on average 8.846153846153847) internal successors, (115), 13 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:07,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:07,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:07,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:07,362 INFO L124 PetriNetUnfolderBase]: 190/385 cut-off events. [2024-02-07 14:43:07,362 INFO L125 PetriNetUnfolderBase]: For 1719/1719 co-relation queries the response was YES. [2024-02-07 14:43:07,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1841 conditions, 385 events. 190/385 cut-off events. For 1719/1719 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1656 event pairs, 1 based on Foata normal form. 37/420 useless extension candidates. Maximal degree in co-relation 626. Up to 133 conditions per place. [2024-02-07 14:43:07,365 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 63 selfloop transitions, 39 changer transitions 26/131 dead transitions. [2024-02-07 14:43:07,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 131 transitions, 1189 flow [2024-02-07 14:43:07,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-07 14:43:07,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-07 14:43:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 211 transitions. [2024-02-07 14:43:07,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5910364145658263 [2024-02-07 14:43:07,369 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 292 flow. Second operand 17 states and 211 transitions. [2024-02-07 14:43:07,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 131 transitions, 1189 flow [2024-02-07 14:43:07,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 131 transitions, 1152 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:07,374 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 757 flow [2024-02-07 14:43:07,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=757, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-02-07 14:43:07,375 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 45 predicate places. [2024-02-07 14:43:07,376 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 757 flow [2024-02-07 14:43:07,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.846153846153847) internal successors, (115), 13 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:07,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:07,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:07,390 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 14:43:07,596 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,SelfDestructingSolverStorable6 [2024-02-07 14:43:07,597 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:07,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:07,598 INFO L85 PathProgramCache]: Analyzing trace with hash 728382444, now seen corresponding path program 2 times [2024-02-07 14:43:07,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:07,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353651332] [2024-02-07 14:43:07,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:07,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:07,673 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 14:43:07,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:07,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353651332] [2024-02-07 14:43:07,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353651332] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:07,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361329198] [2024-02-07 14:43:07,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:43:07,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:07,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:07,681 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 14:43:07,760 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 14:43:07,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:43:07,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:07,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:43:07,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:07,840 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:43:07,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361329198] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:07,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:43:07,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2024-02-07 14:43:07,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420798775] [2024-02-07 14:43:07,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:07,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:43:07,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:07,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:43:07,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:43:07,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:07,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 757 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 14:43:07,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:07,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:07,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:07,920 INFO L124 PetriNetUnfolderBase]: 152/305 cut-off events. [2024-02-07 14:43:07,920 INFO L125 PetriNetUnfolderBase]: For 1916/1916 co-relation queries the response was YES. [2024-02-07 14:43:07,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 305 events. 152/305 cut-off events. For 1916/1916 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1186 event pairs, 13 based on Foata normal form. 4/306 useless extension candidates. Maximal degree in co-relation 1754. Up to 153 conditions per place. [2024-02-07 14:43:07,922 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 51 selfloop transitions, 12 changer transitions 20/86 dead transitions. [2024-02-07 14:43:07,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 86 transitions, 1120 flow [2024-02-07 14:43:07,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:43:07,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:43:07,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 69 transitions. [2024-02-07 14:43:07,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-02-07 14:43:07,923 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 757 flow. Second operand 6 states and 69 transitions. [2024-02-07 14:43:07,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 86 transitions, 1120 flow [2024-02-07 14:43:07,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 946 flow, removed 87 selfloop flow, removed 3 redundant places. [2024-02-07 14:43:07,930 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 566 flow [2024-02-07 14:43:07,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=566, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2024-02-07 14:43:07,932 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 46 predicate places. [2024-02-07 14:43:07,932 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 566 flow [2024-02-07 14:43:07,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 14:43:07,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:07,932 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:07,957 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 14:43:08,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:08,144 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:08,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:08,145 INFO L85 PathProgramCache]: Analyzing trace with hash 507730632, now seen corresponding path program 3 times [2024-02-07 14:43:08,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:08,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344785172] [2024-02-07 14:43:08,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:08,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:08,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:08,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344785172] [2024-02-07 14:43:08,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344785172] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:08,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315666227] [2024-02-07 14:43:08,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:43:08,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:08,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:08,204 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 14:43:08,224 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 14:43:08,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-07 14:43:08,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:08,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 14:43:08,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:08,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:08,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315666227] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:08,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:08,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2024-02-07 14:43:08,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195529554] [2024-02-07 14:43:08,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:08,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 14:43:08,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:08,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 14:43:08,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-02-07 14:43:08,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-02-07 14:43:08,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 566 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 14:43:08,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:08,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-02-07 14:43:08,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:08,481 INFO L124 PetriNetUnfolderBase]: 184/354 cut-off events. [2024-02-07 14:43:08,481 INFO L125 PetriNetUnfolderBase]: For 2970/2970 co-relation queries the response was YES. [2024-02-07 14:43:08,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1874 conditions, 354 events. 184/354 cut-off events. For 2970/2970 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1338 event pairs, 4 based on Foata normal form. 10/362 useless extension candidates. Maximal degree in co-relation 1819. Up to 105 conditions per place. [2024-02-07 14:43:08,484 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 66 selfloop transitions, 37 changer transitions 2/108 dead transitions. [2024-02-07 14:43:08,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 108 transitions, 1166 flow [2024-02-07 14:43:08,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:43:08,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:43:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-02-07 14:43:08,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190476190476191 [2024-02-07 14:43:08,485 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 566 flow. Second operand 10 states and 109 transitions. [2024-02-07 14:43:08,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 108 transitions, 1166 flow [2024-02-07 14:43:08,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 108 transitions, 1072 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-02-07 14:43:08,493 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 863 flow [2024-02-07 14:43:08,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=863, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-02-07 14:43:08,493 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 49 predicate places. [2024-02-07 14:43:08,494 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 863 flow [2024-02-07 14:43:08,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 14:43:08,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:08,494 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:08,508 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 14:43:08,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:08,705 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:08,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:08,705 INFO L85 PathProgramCache]: Analyzing trace with hash 329947690, now seen corresponding path program 4 times [2024-02-07 14:43:08,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:08,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850796922] [2024-02-07 14:43:08,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:08,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 14:43:08,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:08,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850796922] [2024-02-07 14:43:08,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850796922] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:08,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799953041] [2024-02-07 14:43:08,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:43:08,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:08,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:08,760 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 14:43:08,761 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 14:43:08,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:43:08,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:08,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 14:43:08,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:08,851 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 14:43:08,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:08,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799953041] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:08,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:08,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2024-02-07 14:43:08,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064723883] [2024-02-07 14:43:08,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:08,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 14:43:08,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:08,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 14:43:08,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-02-07 14:43:08,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-02-07 14:43:08,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 863 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 14:43:08,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:08,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-02-07 14:43:08,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:09,063 INFO L124 PetriNetUnfolderBase]: 251/482 cut-off events. [2024-02-07 14:43:09,064 INFO L125 PetriNetUnfolderBase]: For 3374/3374 co-relation queries the response was YES. [2024-02-07 14:43:09,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2811 conditions, 482 events. 251/482 cut-off events. For 3374/3374 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1971 event pairs, 14 based on Foata normal form. 6/486 useless extension candidates. Maximal degree in co-relation 2249. Up to 228 conditions per place. [2024-02-07 14:43:09,068 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 84 selfloop transitions, 34 changer transitions 1/122 dead transitions. [2024-02-07 14:43:09,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 122 transitions, 1540 flow [2024-02-07 14:43:09,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:43:09,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:43:09,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 98 transitions. [2024-02-07 14:43:09,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-02-07 14:43:09,070 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 863 flow. Second operand 10 states and 98 transitions. [2024-02-07 14:43:09,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 122 transitions, 1540 flow [2024-02-07 14:43:09,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 122 transitions, 1424 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-02-07 14:43:09,080 INFO L231 Difference]: Finished difference. Result has 79 places, 95 transitions, 1177 flow [2024-02-07 14:43:09,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1177, PETRI_PLACES=79, PETRI_TRANSITIONS=95} [2024-02-07 14:43:09,081 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 56 predicate places. [2024-02-07 14:43:09,081 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 95 transitions, 1177 flow [2024-02-07 14:43:09,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 14:43:09,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:09,081 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:09,095 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 14:43:09,293 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,SelfDestructingSolverStorable9 [2024-02-07 14:43:09,294 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:09,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:09,294 INFO L85 PathProgramCache]: Analyzing trace with hash -286866956, now seen corresponding path program 5 times [2024-02-07 14:43:09,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:09,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832074126] [2024-02-07 14:43:09,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:09,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:09,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:09,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832074126] [2024-02-07 14:43:09,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832074126] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:09,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15946197] [2024-02-07 14:43:09,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:43:09,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:09,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:09,341 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 14:43:09,364 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 14:43:09,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:43:09,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:09,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 14:43:09,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:09,436 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 14:43:09,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:09,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15946197] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:09,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:09,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-02-07 14:43:09,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461554064] [2024-02-07 14:43:09,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:09,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 14:43:09,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:09,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 14:43:09,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-02-07 14:43:09,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:09,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 95 transitions, 1177 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 14:43:09,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:09,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:09,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:09,645 INFO L124 PetriNetUnfolderBase]: 242/473 cut-off events. [2024-02-07 14:43:09,645 INFO L125 PetriNetUnfolderBase]: For 3361/3361 co-relation queries the response was YES. [2024-02-07 14:43:09,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2867 conditions, 473 events. 242/473 cut-off events. For 3361/3361 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1967 event pairs, 16 based on Foata normal form. 6/477 useless extension candidates. Maximal degree in co-relation 2348. Up to 230 conditions per place. [2024-02-07 14:43:09,649 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 84 selfloop transitions, 37 changer transitions 3/127 dead transitions. [2024-02-07 14:43:09,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 127 transitions, 1615 flow [2024-02-07 14:43:09,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 14:43:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 14:43:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 138 transitions. [2024-02-07 14:43:09,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054945054945055 [2024-02-07 14:43:09,651 INFO L175 Difference]: Start difference. First operand has 79 places, 95 transitions, 1177 flow. Second operand 13 states and 138 transitions. [2024-02-07 14:43:09,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 127 transitions, 1615 flow [2024-02-07 14:43:09,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 127 transitions, 1554 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-02-07 14:43:09,662 INFO L231 Difference]: Finished difference. Result has 88 places, 96 transitions, 1200 flow [2024-02-07 14:43:09,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1200, PETRI_PLACES=88, PETRI_TRANSITIONS=96} [2024-02-07 14:43:09,663 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 65 predicate places. [2024-02-07 14:43:09,663 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 96 transitions, 1200 flow [2024-02-07 14:43:09,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 14:43:09,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:09,663 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:09,677 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 14:43:09,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:09,875 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:09,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:09,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1459261253, now seen corresponding path program 6 times [2024-02-07 14:43:09,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:09,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336673635] [2024-02-07 14:43:09,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:09,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:10,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:10,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336673635] [2024-02-07 14:43:10,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336673635] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:10,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085181961] [2024-02-07 14:43:10,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 14:43:10,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:10,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:10,013 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 14:43:10,039 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 14:43:10,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-07 14:43:10,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:10,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:43:10,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:10,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:10,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085181961] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:10,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:10,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 15 [2024-02-07 14:43:10,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590821955] [2024-02-07 14:43:10,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:10,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 14:43:10,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:10,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 14:43:10,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:43:10,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:10,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 96 transitions, 1200 flow. Second operand has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 14:43:10,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:10,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:10,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:10,417 INFO L124 PetriNetUnfolderBase]: 349/668 cut-off events. [2024-02-07 14:43:10,417 INFO L125 PetriNetUnfolderBase]: For 6025/6025 co-relation queries the response was YES. [2024-02-07 14:43:10,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4184 conditions, 668 events. 349/668 cut-off events. For 6025/6025 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3093 event pairs, 41 based on Foata normal form. 34/700 useless extension candidates. Maximal degree in co-relation 3568. Up to 394 conditions per place. [2024-02-07 14:43:10,421 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 112 selfloop transitions, 40 changer transitions 3/158 dead transitions. [2024-02-07 14:43:10,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 158 transitions, 2081 flow [2024-02-07 14:43:10,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:43:10,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:43:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-02-07 14:43:10,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-02-07 14:43:10,422 INFO L175 Difference]: Start difference. First operand has 88 places, 96 transitions, 1200 flow. Second operand 10 states and 130 transitions. [2024-02-07 14:43:10,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 158 transitions, 2081 flow [2024-02-07 14:43:10,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 158 transitions, 1984 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-02-07 14:43:10,435 INFO L231 Difference]: Finished difference. Result has 96 places, 122 transitions, 1580 flow [2024-02-07 14:43:10,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1580, PETRI_PLACES=96, PETRI_TRANSITIONS=122} [2024-02-07 14:43:10,436 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 73 predicate places. [2024-02-07 14:43:10,436 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 122 transitions, 1580 flow [2024-02-07 14:43:10,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 14:43:10,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:10,437 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:10,476 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 14:43:10,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:10,647 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:10,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:10,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1896556907, now seen corresponding path program 7 times [2024-02-07 14:43:10,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:10,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122786309] [2024-02-07 14:43:10,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:10,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:10,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:10,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122786309] [2024-02-07 14:43:10,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122786309] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:10,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678477467] [2024-02-07 14:43:10,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 14:43:10,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:10,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:10,715 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 14:43:10,740 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 14:43:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:10,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:43:10,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:10,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:43:10,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678477467] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:10,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:10,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 11 [2024-02-07 14:43:10,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059354010] [2024-02-07 14:43:10,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:10,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 14:43:10,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:10,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 14:43:10,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-02-07 14:43:10,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-02-07 14:43:10,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 122 transitions, 1580 flow. Second operand has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 14:43:10,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:10,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-02-07 14:43:10,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:11,091 INFO L124 PetriNetUnfolderBase]: 542/1052 cut-off events. [2024-02-07 14:43:11,091 INFO L125 PetriNetUnfolderBase]: For 11075/11075 co-relation queries the response was YES. [2024-02-07 14:43:11,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7218 conditions, 1052 events. 542/1052 cut-off events. For 11075/11075 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5605 event pairs, 60 based on Foata normal form. 16/1066 useless extension candidates. Maximal degree in co-relation 6301. Up to 596 conditions per place. [2024-02-07 14:43:11,100 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 147 selfloop transitions, 66 changer transitions 14/230 dead transitions. [2024-02-07 14:43:11,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 230 transitions, 3354 flow [2024-02-07 14:43:11,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 14:43:11,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 14:43:11,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-02-07 14:43:11,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5800865800865801 [2024-02-07 14:43:11,101 INFO L175 Difference]: Start difference. First operand has 96 places, 122 transitions, 1580 flow. Second operand 11 states and 134 transitions. [2024-02-07 14:43:11,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 230 transitions, 3354 flow [2024-02-07 14:43:11,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 230 transitions, 3234 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:11,129 INFO L231 Difference]: Finished difference. Result has 112 places, 175 transitions, 2584 flow [2024-02-07 14:43:11,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1474, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2584, PETRI_PLACES=112, PETRI_TRANSITIONS=175} [2024-02-07 14:43:11,130 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 89 predicate places. [2024-02-07 14:43:11,130 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 175 transitions, 2584 flow [2024-02-07 14:43:11,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 14:43:11,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:11,131 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:11,144 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 14:43:11,343 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,SelfDestructingSolverStorable12 [2024-02-07 14:43:11,343 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:11,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:11,343 INFO L85 PathProgramCache]: Analyzing trace with hash -872596097, now seen corresponding path program 8 times [2024-02-07 14:43:11,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:11,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525193395] [2024-02-07 14:43:11,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:11,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:11,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:11,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525193395] [2024-02-07 14:43:11,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525193395] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:11,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083692567] [2024-02-07 14:43:11,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:43:11,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:11,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:11,417 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 14:43:11,442 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 14:43:11,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:43:11,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:11,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:43:11,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:11,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 14:43:11,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083692567] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:11,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:11,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 15 [2024-02-07 14:43:11,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718312537] [2024-02-07 14:43:11,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:11,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 14:43:11,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:11,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 14:43:11,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:43:11,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:11,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 175 transitions, 2584 flow. Second operand has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 14:43:11,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:11,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:11,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:11,898 INFO L124 PetriNetUnfolderBase]: 603/1174 cut-off events. [2024-02-07 14:43:11,898 INFO L125 PetriNetUnfolderBase]: For 17361/17361 co-relation queries the response was YES. [2024-02-07 14:43:11,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8746 conditions, 1174 events. 603/1174 cut-off events. For 17361/17361 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6506 event pairs, 78 based on Foata normal form. 25/1197 useless extension candidates. Maximal degree in co-relation 7535. Up to 798 conditions per place. [2024-02-07 14:43:11,909 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 172 selfloop transitions, 62 changer transitions 9/246 dead transitions. [2024-02-07 14:43:11,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 246 transitions, 3911 flow [2024-02-07 14:43:11,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:43:11,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:43:11,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-02-07 14:43:11,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-02-07 14:43:11,910 INFO L175 Difference]: Start difference. First operand has 112 places, 175 transitions, 2584 flow. Second operand 10 states and 129 transitions. [2024-02-07 14:43:11,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 246 transitions, 3911 flow [2024-02-07 14:43:11,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 246 transitions, 3624 flow, removed 142 selfloop flow, removed 1 redundant places. [2024-02-07 14:43:11,961 INFO L231 Difference]: Finished difference. Result has 124 places, 203 transitions, 2953 flow [2024-02-07 14:43:11,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2271, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2953, PETRI_PLACES=124, PETRI_TRANSITIONS=203} [2024-02-07 14:43:11,962 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 101 predicate places. [2024-02-07 14:43:11,962 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 203 transitions, 2953 flow [2024-02-07 14:43:11,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 14:43:11,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:11,962 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:11,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:12,173 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,SelfDestructingSolverStorable13 [2024-02-07 14:43:12,174 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:12,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:12,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1596741454, now seen corresponding path program 9 times [2024-02-07 14:43:12,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:12,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175276817] [2024-02-07 14:43:12,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:12,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:12,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:12,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175276817] [2024-02-07 14:43:12,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175276817] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:12,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980436949] [2024-02-07 14:43:12,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:43:12,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:12,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:12,218 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 14:43:12,222 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 14:43:12,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-07 14:43:12,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:12,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 14:43:12,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:12,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 14:43:12,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 14:43:12,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980436949] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:12,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:12,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-02-07 14:43:12,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174436394] [2024-02-07 14:43:12,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:12,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 14:43:12,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:12,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 14:43:12,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-02-07 14:43:12,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-02-07 14:43:12,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 203 transitions, 2953 flow. Second operand has 12 states, 12 states have (on average 7.833333333333333) internal successors, (94), 12 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 14:43:12,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:12,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-02-07 14:43:12,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:12,591 INFO L124 PetriNetUnfolderBase]: 555/1072 cut-off events. [2024-02-07 14:43:12,591 INFO L125 PetriNetUnfolderBase]: For 16799/16799 co-relation queries the response was YES. [2024-02-07 14:43:12,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8223 conditions, 1072 events. 555/1072 cut-off events. For 16799/16799 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5709 event pairs, 44 based on Foata normal form. 8/1078 useless extension candidates. Maximal degree in co-relation 7519. Up to 651 conditions per place. [2024-02-07 14:43:12,599 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 159 selfloop transitions, 46 changer transitions 11/219 dead transitions. [2024-02-07 14:43:12,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 219 transitions, 3487 flow [2024-02-07 14:43:12,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:43:12,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:43:12,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 89 transitions. [2024-02-07 14:43:12,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-02-07 14:43:12,600 INFO L175 Difference]: Start difference. First operand has 124 places, 203 transitions, 2953 flow. Second operand 10 states and 89 transitions. [2024-02-07 14:43:12,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 219 transitions, 3487 flow [2024-02-07 14:43:12,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 219 transitions, 3311 flow, removed 88 selfloop flow, removed 0 redundant places. [2024-02-07 14:43:12,652 INFO L231 Difference]: Finished difference. Result has 133 places, 193 transitions, 2711 flow [2024-02-07 14:43:12,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2701, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2711, PETRI_PLACES=133, PETRI_TRANSITIONS=193} [2024-02-07 14:43:12,653 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 110 predicate places. [2024-02-07 14:43:12,653 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 193 transitions, 2711 flow [2024-02-07 14:43:12,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.833333333333333) internal successors, (94), 12 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 14:43:12,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:12,654 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:12,676 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 14:43:12,865 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,SelfDestructingSolverStorable14 [2024-02-07 14:43:12,866 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:12,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:12,866 INFO L85 PathProgramCache]: Analyzing trace with hash 735432397, now seen corresponding path program 10 times [2024-02-07 14:43:12,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:12,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114623526] [2024-02-07 14:43:12,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:12,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:12,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:12,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114623526] [2024-02-07 14:43:12,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114623526] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:12,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44908188] [2024-02-07 14:43:12,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:43:12,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:12,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:12,920 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 14:43:12,944 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 14:43:12,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:43:12,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:12,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:43:12,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:13,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:13,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44908188] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:13,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:13,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-02-07 14:43:13,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431032169] [2024-02-07 14:43:13,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:13,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 14:43:13,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:13,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 14:43:13,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:43:13,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:13,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 193 transitions, 2711 flow. Second operand has 14 states, 14 states have (on average 8.357142857142858) internal successors, (117), 14 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 14:43:13,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:13,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:13,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:13,320 INFO L124 PetriNetUnfolderBase]: 515/1034 cut-off events. [2024-02-07 14:43:13,320 INFO L125 PetriNetUnfolderBase]: For 21897/21897 co-relation queries the response was YES. [2024-02-07 14:43:13,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8338 conditions, 1034 events. 515/1034 cut-off events. For 21897/21897 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5715 event pairs, 8 based on Foata normal form. 52/1084 useless extension candidates. Maximal degree in co-relation 8125. Up to 281 conditions per place. [2024-02-07 14:43:13,329 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 101 selfloop transitions, 132 changer transitions 17/253 dead transitions. [2024-02-07 14:43:13,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 253 transitions, 4005 flow [2024-02-07 14:43:13,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 14:43:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 14:43:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-02-07 14:43:13,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-02-07 14:43:13,331 INFO L175 Difference]: Start difference. First operand has 133 places, 193 transitions, 2711 flow. Second operand 12 states and 146 transitions. [2024-02-07 14:43:13,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 253 transitions, 4005 flow [2024-02-07 14:43:13,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 253 transitions, 3869 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-02-07 14:43:13,391 INFO L231 Difference]: Finished difference. Result has 135 places, 198 transitions, 3408 flow [2024-02-07 14:43:13,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2507, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3408, PETRI_PLACES=135, PETRI_TRANSITIONS=198} [2024-02-07 14:43:13,392 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 112 predicate places. [2024-02-07 14:43:13,392 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 198 transitions, 3408 flow [2024-02-07 14:43:13,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.357142857142858) internal successors, (117), 14 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 14:43:13,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:13,393 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:13,418 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 14:43:13,603 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,SelfDestructingSolverStorable15 [2024-02-07 14:43:13,604 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:13,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:13,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1774414691, now seen corresponding path program 11 times [2024-02-07 14:43:13,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:13,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622882051] [2024-02-07 14:43:13,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:13,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:13,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:13,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622882051] [2024-02-07 14:43:13,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622882051] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:13,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443003031] [2024-02-07 14:43:13,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:43:13,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:13,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:13,715 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 14:43:13,736 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 14:43:13,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-07 14:43:13,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:13,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:43:13,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:13,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:13,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443003031] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:13,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:13,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2024-02-07 14:43:13,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135205233] [2024-02-07 14:43:13,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:13,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 14:43:13,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:13,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 14:43:13,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2024-02-07 14:43:13,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-02-07 14:43:13,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 198 transitions, 3408 flow. Second operand has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 14:43:13,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:13,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-02-07 14:43:13,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:14,225 INFO L124 PetriNetUnfolderBase]: 473/962 cut-off events. [2024-02-07 14:43:14,225 INFO L125 PetriNetUnfolderBase]: For 22240/22240 co-relation queries the response was YES. [2024-02-07 14:43:14,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8423 conditions, 962 events. 473/962 cut-off events. For 22240/22240 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5314 event pairs, 12 based on Foata normal form. 4/964 useless extension candidates. Maximal degree in co-relation 7818. Up to 269 conditions per place. [2024-02-07 14:43:14,241 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 92 selfloop transitions, 151 changer transitions 2/248 dead transitions. [2024-02-07 14:43:14,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 248 transitions, 4349 flow [2024-02-07 14:43:14,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-07 14:43:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-07 14:43:14,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 162 transitions. [2024-02-07 14:43:14,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-02-07 14:43:14,242 INFO L175 Difference]: Start difference. First operand has 135 places, 198 transitions, 3408 flow. Second operand 16 states and 162 transitions. [2024-02-07 14:43:14,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 248 transitions, 4349 flow [2024-02-07 14:43:14,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 248 transitions, 4015 flow, removed 161 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:14,333 INFO L231 Difference]: Finished difference. Result has 149 places, 205 transitions, 3624 flow [2024-02-07 14:43:14,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3098, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3624, PETRI_PLACES=149, PETRI_TRANSITIONS=205} [2024-02-07 14:43:14,333 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 126 predicate places. [2024-02-07 14:43:14,334 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 205 transitions, 3624 flow [2024-02-07 14:43:14,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 14:43:14,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:14,334 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:14,359 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 14:43:14,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-07 14:43:14,546 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:14,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:14,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1175699068, now seen corresponding path program 12 times [2024-02-07 14:43:14,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:14,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686551820] [2024-02-07 14:43:14,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:14,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 14:43:14,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:14,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686551820] [2024-02-07 14:43:14,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686551820] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:14,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049372176] [2024-02-07 14:43:14,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 14:43:14,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:14,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:14,602 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 14:43:14,604 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 14:43:14,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-07 14:43:14,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:14,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:43:14,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:14,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:14,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049372176] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:14,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:14,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2024-02-07 14:43:14,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104286908] [2024-02-07 14:43:14,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:14,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 14:43:14,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:14,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 14:43:14,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2024-02-07 14:43:14,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-02-07 14:43:14,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 205 transitions, 3624 flow. Second operand has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 14:43:14,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:14,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-02-07 14:43:14,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:15,188 INFO L124 PetriNetUnfolderBase]: 561/1136 cut-off events. [2024-02-07 14:43:15,188 INFO L125 PetriNetUnfolderBase]: For 20091/20091 co-relation queries the response was YES. [2024-02-07 14:43:15,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9512 conditions, 1136 events. 561/1136 cut-off events. For 20091/20091 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6515 event pairs, 6 based on Foata normal form. 16/1150 useless extension candidates. Maximal degree in co-relation 8873. Up to 325 conditions per place. [2024-02-07 14:43:15,198 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 168 selfloop transitions, 135 changer transitions 14/320 dead transitions. [2024-02-07 14:43:15,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 320 transitions, 5821 flow [2024-02-07 14:43:15,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-07 14:43:15,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-07 14:43:15,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 227 transitions. [2024-02-07 14:43:15,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49134199134199136 [2024-02-07 14:43:15,199 INFO L175 Difference]: Start difference. First operand has 149 places, 205 transitions, 3624 flow. Second operand 22 states and 227 transitions. [2024-02-07 14:43:15,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 320 transitions, 5821 flow [2024-02-07 14:43:15,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 320 transitions, 5520 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-02-07 14:43:15,273 INFO L231 Difference]: Finished difference. Result has 167 places, 249 transitions, 4873 flow [2024-02-07 14:43:15,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3349, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4873, PETRI_PLACES=167, PETRI_TRANSITIONS=249} [2024-02-07 14:43:15,274 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 144 predicate places. [2024-02-07 14:43:15,274 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 249 transitions, 4873 flow [2024-02-07 14:43:15,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 14:43:15,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:15,274 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:15,286 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 14:43:15,485 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,SelfDestructingSolverStorable17 [2024-02-07 14:43:15,486 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:15,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:15,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1319323341, now seen corresponding path program 13 times [2024-02-07 14:43:15,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:15,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919146632] [2024-02-07 14:43:15,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:15,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:15,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:15,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919146632] [2024-02-07 14:43:15,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919146632] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:15,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224499928] [2024-02-07 14:43:15,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 14:43:15,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:15,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:15,541 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 14:43:15,543 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 14:43:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:15,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:43:15,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:15,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:15,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224499928] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:15,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:15,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-02-07 14:43:15,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204458234] [2024-02-07 14:43:15,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:15,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 14:43:15,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:15,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 14:43:15,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:43:15,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-02-07 14:43:15,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 249 transitions, 4873 flow. Second operand has 15 states, 15 states have (on average 7.333333333333333) internal successors, (110), 15 states have internal predecessors, (110), 0 states have call successors, (0), 0 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 14:43:15,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:15,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-02-07 14:43:15,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:16,132 INFO L124 PetriNetUnfolderBase]: 580/1173 cut-off events. [2024-02-07 14:43:16,133 INFO L125 PetriNetUnfolderBase]: For 21607/21607 co-relation queries the response was YES. [2024-02-07 14:43:16,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10223 conditions, 1173 events. 580/1173 cut-off events. For 21607/21607 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6721 event pairs, 30 based on Foata normal form. 20/1191 useless extension candidates. Maximal degree in co-relation 9755. Up to 365 conditions per place. [2024-02-07 14:43:16,143 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 136 selfloop transitions, 162 changer transitions 8/309 dead transitions. [2024-02-07 14:43:16,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 309 transitions, 6230 flow [2024-02-07 14:43:16,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-07 14:43:16,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-07 14:43:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 150 transitions. [2024-02-07 14:43:16,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-02-07 14:43:16,146 INFO L175 Difference]: Start difference. First operand has 167 places, 249 transitions, 4873 flow. Second operand 15 states and 150 transitions. [2024-02-07 14:43:16,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 309 transitions, 6230 flow [2024-02-07 14:43:16,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 309 transitions, 5424 flow, removed 356 selfloop flow, removed 10 redundant places. [2024-02-07 14:43:16,283 INFO L231 Difference]: Finished difference. Result has 178 places, 267 transitions, 5070 flow [2024-02-07 14:43:16,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4024, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5070, PETRI_PLACES=178, PETRI_TRANSITIONS=267} [2024-02-07 14:43:16,283 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 155 predicate places. [2024-02-07 14:43:16,283 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 267 transitions, 5070 flow [2024-02-07 14:43:16,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.333333333333333) internal successors, (110), 15 states have internal predecessors, (110), 0 states have call successors, (0), 0 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 14:43:16,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:16,284 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:16,296 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 14:43:16,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:16,496 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:16,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:16,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1206219602, now seen corresponding path program 14 times [2024-02-07 14:43:16,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:16,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486328772] [2024-02-07 14:43:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:16,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:16,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:16,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486328772] [2024-02-07 14:43:16,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486328772] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:16,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976630683] [2024-02-07 14:43:16,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:43:16,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:16,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:16,551 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 14:43:16,552 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 14:43:16,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:43:16,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:16,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:43:16,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:16,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:16,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:16,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976630683] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:16,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:16,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2024-02-07 14:43:16,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102324842] [2024-02-07 14:43:16,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:16,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 14:43:16,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:16,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 14:43:16,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2024-02-07 14:43:16,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-02-07 14:43:16,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 267 transitions, 5070 flow. Second operand has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 14:43:16,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:16,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-02-07 14:43:16,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:17,162 INFO L124 PetriNetUnfolderBase]: 687/1392 cut-off events. [2024-02-07 14:43:17,162 INFO L125 PetriNetUnfolderBase]: For 17983/17983 co-relation queries the response was YES. [2024-02-07 14:43:17,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11316 conditions, 1392 events. 687/1392 cut-off events. For 17983/17983 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8337 event pairs, 12 based on Foata normal form. 6/1396 useless extension candidates. Maximal degree in co-relation 10019. Up to 339 conditions per place. [2024-02-07 14:43:17,173 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 177 selfloop transitions, 205 changer transitions 5/390 dead transitions. [2024-02-07 14:43:17,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 390 transitions, 7235 flow [2024-02-07 14:43:17,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-07 14:43:17,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-07 14:43:17,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 213 transitions. [2024-02-07 14:43:17,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-02-07 14:43:17,175 INFO L175 Difference]: Start difference. First operand has 178 places, 267 transitions, 5070 flow. Second operand 20 states and 213 transitions. [2024-02-07 14:43:17,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 390 transitions, 7235 flow [2024-02-07 14:43:17,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 390 transitions, 6988 flow, removed 115 selfloop flow, removed 4 redundant places. [2024-02-07 14:43:17,258 INFO L231 Difference]: Finished difference. Result has 198 places, 314 transitions, 6448 flow [2024-02-07 14:43:17,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4890, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6448, PETRI_PLACES=198, PETRI_TRANSITIONS=314} [2024-02-07 14:43:17,259 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 175 predicate places. [2024-02-07 14:43:17,259 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 314 transitions, 6448 flow [2024-02-07 14:43:17,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 14:43:17,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:17,260 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:17,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-02-07 14:43:17,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:17,471 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:17,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:17,472 INFO L85 PathProgramCache]: Analyzing trace with hash 429070003, now seen corresponding path program 15 times [2024-02-07 14:43:17,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:17,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629945689] [2024-02-07 14:43:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:17,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:17,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:17,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629945689] [2024-02-07 14:43:17,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629945689] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:17,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465502394] [2024-02-07 14:43:17,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:43:17,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:17,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:17,561 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:17,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-07 14:43:17,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-07 14:43:17,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:17,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:43:17,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:17,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:17,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:17,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465502394] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:17,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:17,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2024-02-07 14:43:17,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285297297] [2024-02-07 14:43:17,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:17,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 14:43:17,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:17,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 14:43:17,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2024-02-07 14:43:17,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:17,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 314 transitions, 6448 flow. Second operand has 16 states, 16 states have (on average 8.3125) internal successors, (133), 16 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:17,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:17,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:17,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:18,150 INFO L124 PetriNetUnfolderBase]: 714/1401 cut-off events. [2024-02-07 14:43:18,150 INFO L125 PetriNetUnfolderBase]: For 17742/17742 co-relation queries the response was YES. [2024-02-07 14:43:18,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12376 conditions, 1401 events. 714/1401 cut-off events. For 17742/17742 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 8107 event pairs, 52 based on Foata normal form. 8/1407 useless extension candidates. Maximal degree in co-relation 11199. Up to 775 conditions per place. [2024-02-07 14:43:18,164 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 241 selfloop transitions, 111 changer transitions 15/370 dead transitions. [2024-02-07 14:43:18,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 370 transitions, 8020 flow [2024-02-07 14:43:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-07 14:43:18,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-07 14:43:18,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 160 transitions. [2024-02-07 14:43:18,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-02-07 14:43:18,166 INFO L175 Difference]: Start difference. First operand has 198 places, 314 transitions, 6448 flow. Second operand 16 states and 160 transitions. [2024-02-07 14:43:18,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 370 transitions, 8020 flow [2024-02-07 14:43:18,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 370 transitions, 7777 flow, removed 100 selfloop flow, removed 6 redundant places. [2024-02-07 14:43:18,277 INFO L231 Difference]: Finished difference. Result has 207 places, 328 transitions, 6769 flow [2024-02-07 14:43:18,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6124, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6769, PETRI_PLACES=207, PETRI_TRANSITIONS=328} [2024-02-07 14:43:18,278 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 184 predicate places. [2024-02-07 14:43:18,278 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 328 transitions, 6769 flow [2024-02-07 14:43:18,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.3125) internal successors, (133), 16 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:18,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:18,278 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:18,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:18,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:18,490 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:18,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:18,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1965805561, now seen corresponding path program 16 times [2024-02-07 14:43:18,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:18,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201310799] [2024-02-07 14:43:18,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:18,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:18,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:18,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201310799] [2024-02-07 14:43:18,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201310799] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:18,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785314685] [2024-02-07 14:43:18,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:43:18,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:18,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:18,569 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:18,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-07 14:43:18,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:43:18,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:18,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:43:18,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:18,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:18,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:18,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785314685] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:18,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:18,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-02-07 14:43:18,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044194321] [2024-02-07 14:43:18,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:18,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 14:43:18,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:18,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 14:43:18,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:43:18,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-02-07 14:43:18,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 328 transitions, 6769 flow. Second operand has 15 states, 15 states have (on average 7.333333333333333) internal successors, (110), 15 states have internal predecessors, (110), 0 states have call successors, (0), 0 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 14:43:18,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:18,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-02-07 14:43:18,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:19,122 INFO L124 PetriNetUnfolderBase]: 679/1302 cut-off events. [2024-02-07 14:43:19,122 INFO L125 PetriNetUnfolderBase]: For 15757/15757 co-relation queries the response was YES. [2024-02-07 14:43:19,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11601 conditions, 1302 events. 679/1302 cut-off events. For 15757/15757 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7230 event pairs, 40 based on Foata normal form. 24/1324 useless extension candidates. Maximal degree in co-relation 10782. Up to 501 conditions per place. [2024-02-07 14:43:19,137 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 184 selfloop transitions, 169 changer transitions 10/366 dead transitions. [2024-02-07 14:43:19,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 366 transitions, 7790 flow [2024-02-07 14:43:19,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-07 14:43:19,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-07 14:43:19,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 153 transitions. [2024-02-07 14:43:19,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-02-07 14:43:19,139 INFO L175 Difference]: Start difference. First operand has 207 places, 328 transitions, 6769 flow. Second operand 16 states and 153 transitions. [2024-02-07 14:43:19,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 366 transitions, 7790 flow [2024-02-07 14:43:19,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 366 transitions, 7556 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-02-07 14:43:19,227 INFO L231 Difference]: Finished difference. Result has 214 places, 319 transitions, 6681 flow [2024-02-07 14:43:19,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6307, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6681, PETRI_PLACES=214, PETRI_TRANSITIONS=319} [2024-02-07 14:43:19,227 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 191 predicate places. [2024-02-07 14:43:19,227 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 319 transitions, 6681 flow [2024-02-07 14:43:19,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.333333333333333) internal successors, (110), 15 states have internal predecessors, (110), 0 states have call successors, (0), 0 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 14:43:19,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:19,228 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:19,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:19,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:19,440 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:19,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:19,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1165157664, now seen corresponding path program 17 times [2024-02-07 14:43:19,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:19,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418294414] [2024-02-07 14:43:19,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:19,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:19,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:19,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418294414] [2024-02-07 14:43:19,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418294414] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:19,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543108910] [2024-02-07 14:43:19,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:43:19,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:19,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:19,505 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:19,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-07 14:43:19,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-07 14:43:19,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:19,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:43:19,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:19,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:19,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543108910] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:19,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:19,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-02-07 14:43:19,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901552729] [2024-02-07 14:43:19,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:19,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 14:43:19,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:19,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 14:43:19,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:43:19,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-02-07 14:43:19,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 319 transitions, 6681 flow. Second operand has 15 states, 15 states have (on average 7.333333333333333) internal successors, (110), 15 states have internal predecessors, (110), 0 states have call successors, (0), 0 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 14:43:19,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:19,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-02-07 14:43:19,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:20,180 INFO L124 PetriNetUnfolderBase]: 704/1374 cut-off events. [2024-02-07 14:43:20,181 INFO L125 PetriNetUnfolderBase]: For 14595/14595 co-relation queries the response was YES. [2024-02-07 14:43:20,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12070 conditions, 1374 events. 704/1374 cut-off events. For 14595/14595 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7859 event pairs, 6 based on Foata normal form. 12/1384 useless extension candidates. Maximal degree in co-relation 11515. Up to 513 conditions per place. [2024-02-07 14:43:20,194 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 219 selfloop transitions, 169 changer transitions 0/391 dead transitions. [2024-02-07 14:43:20,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 391 transitions, 7983 flow [2024-02-07 14:43:20,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-07 14:43:20,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-07 14:43:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 181 transitions. [2024-02-07 14:43:20,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2024-02-07 14:43:20,199 INFO L175 Difference]: Start difference. First operand has 214 places, 319 transitions, 6681 flow. Second operand 17 states and 181 transitions. [2024-02-07 14:43:20,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 391 transitions, 7983 flow [2024-02-07 14:43:20,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 391 transitions, 7664 flow, removed 73 selfloop flow, removed 9 redundant places. [2024-02-07 14:43:20,286 INFO L231 Difference]: Finished difference. Result has 224 places, 340 transitions, 7179 flow [2024-02-07 14:43:20,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6381, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7179, PETRI_PLACES=224, PETRI_TRANSITIONS=340} [2024-02-07 14:43:20,287 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 201 predicate places. [2024-02-07 14:43:20,287 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 340 transitions, 7179 flow [2024-02-07 14:43:20,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.333333333333333) internal successors, (110), 15 states have internal predecessors, (110), 0 states have call successors, (0), 0 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 14:43:20,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:20,287 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:20,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:20,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:20,499 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:20,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:20,499 INFO L85 PathProgramCache]: Analyzing trace with hash -707112322, now seen corresponding path program 18 times [2024-02-07 14:43:20,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:20,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975549251] [2024-02-07 14:43:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:20,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:20,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:20,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975549251] [2024-02-07 14:43:20,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975549251] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:20,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898616934] [2024-02-07 14:43:20,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 14:43:20,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:20,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:20,606 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:20,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-02-07 14:43:20,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-07 14:43:20,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:20,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:43:20,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-07 14:43:20,701 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:43:20,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898616934] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:20,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:43:20,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-02-07 14:43:20,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966430353] [2024-02-07 14:43:20,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:20,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:43:20,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:20,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:43:20,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:43:20,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:20,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 340 transitions, 7179 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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 14:43:20,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:20,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:20,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:20,992 INFO L124 PetriNetUnfolderBase]: 704/1346 cut-off events. [2024-02-07 14:43:20,992 INFO L125 PetriNetUnfolderBase]: For 13947/13947 co-relation queries the response was YES. [2024-02-07 14:43:21,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12334 conditions, 1346 events. 704/1346 cut-off events. For 13947/13947 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7607 event pairs, 9 based on Foata normal form. 14/1358 useless extension candidates. Maximal degree in co-relation 11848. Up to 670 conditions per place. [2024-02-07 14:43:21,008 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 261 selfloop transitions, 26 changer transitions 75/365 dead transitions. [2024-02-07 14:43:21,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 365 transitions, 8194 flow [2024-02-07 14:43:21,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:43:21,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:43:21,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2024-02-07 14:43:21,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-02-07 14:43:21,010 INFO L175 Difference]: Start difference. First operand has 224 places, 340 transitions, 7179 flow. Second operand 6 states and 70 transitions. [2024-02-07 14:43:21,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 365 transitions, 8194 flow [2024-02-07 14:43:21,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 365 transitions, 8052 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-02-07 14:43:21,127 INFO L231 Difference]: Finished difference. Result has 223 places, 285 transitions, 6096 flow [2024-02-07 14:43:21,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7036, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6096, PETRI_PLACES=223, PETRI_TRANSITIONS=285} [2024-02-07 14:43:21,128 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 200 predicate places. [2024-02-07 14:43:21,129 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 285 transitions, 6096 flow [2024-02-07 14:43:21,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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 14:43:21,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:21,129 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:21,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:21,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:21,343 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:21,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:21,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1216361102, now seen corresponding path program 19 times [2024-02-07 14:43:21,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:21,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986810312] [2024-02-07 14:43:21,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:21,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:21,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:21,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986810312] [2024-02-07 14:43:21,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986810312] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:21,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886470482] [2024-02-07 14:43:21,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 14:43:21,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:21,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:21,439 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:21,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-02-07 14:43:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:21,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:43:21,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:21,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 14:43:21,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886470482] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:21,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:21,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 20 [2024-02-07 14:43:21,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450394945] [2024-02-07 14:43:21,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:21,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-07 14:43:21,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:21,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-07 14:43:21,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2024-02-07 14:43:21,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:21,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 285 transitions, 6096 flow. Second operand has 20 states, 20 states have (on average 8.35) internal successors, (167), 20 states have internal predecessors, (167), 0 states have call successors, (0), 0 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 14:43:21,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:21,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:21,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:22,065 INFO L124 PetriNetUnfolderBase]: 564/1083 cut-off events. [2024-02-07 14:43:22,065 INFO L125 PetriNetUnfolderBase]: For 12712/12712 co-relation queries the response was YES. [2024-02-07 14:43:22,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10213 conditions, 1083 events. 564/1083 cut-off events. For 12712/12712 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5758 event pairs, 13 based on Foata normal form. 37/1118 useless extension candidates. Maximal degree in co-relation 10063. Up to 765 conditions per place. [2024-02-07 14:43:22,076 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 261 selfloop transitions, 75 changer transitions 33/372 dead transitions. [2024-02-07 14:43:22,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 372 transitions, 8009 flow [2024-02-07 14:43:22,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 14:43:22,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 14:43:22,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 167 transitions. [2024-02-07 14:43:22,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6117216117216118 [2024-02-07 14:43:22,079 INFO L175 Difference]: Start difference. First operand has 223 places, 285 transitions, 6096 flow. Second operand 13 states and 167 transitions. [2024-02-07 14:43:22,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 372 transitions, 8009 flow [2024-02-07 14:43:22,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 372 transitions, 7539 flow, removed 74 selfloop flow, removed 17 redundant places. [2024-02-07 14:43:22,161 INFO L231 Difference]: Finished difference. Result has 214 places, 320 transitions, 6585 flow [2024-02-07 14:43:22,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5742, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6585, PETRI_PLACES=214, PETRI_TRANSITIONS=320} [2024-02-07 14:43:22,162 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 191 predicate places. [2024-02-07 14:43:22,163 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 320 transitions, 6585 flow [2024-02-07 14:43:22,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.35) internal successors, (167), 20 states have internal predecessors, (167), 0 states have call successors, (0), 0 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 14:43:22,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:22,163 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:22,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:22,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-02-07 14:43:22,376 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:22,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:22,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2116881894, now seen corresponding path program 20 times [2024-02-07 14:43:22,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:22,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453494676] [2024-02-07 14:43:22,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:22,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 14:43:22,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:22,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453494676] [2024-02-07 14:43:22,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453494676] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:22,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752572872] [2024-02-07 14:43:22,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:43:22,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:22,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:22,465 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:22,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-02-07 14:43:22,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:43:22,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:22,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:43:22,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:22,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:43:22,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752572872] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:22,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:22,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 6] total 14 [2024-02-07 14:43:22,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191386815] [2024-02-07 14:43:22,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:22,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 14:43:22,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:22,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 14:43:22,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:43:22,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:22,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 320 transitions, 6585 flow. Second operand has 14 states, 14 states have (on average 8.642857142857142) internal successors, (121), 14 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:22,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:22,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:22,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:23,148 INFO L124 PetriNetUnfolderBase]: 727/1395 cut-off events. [2024-02-07 14:43:23,148 INFO L125 PetriNetUnfolderBase]: For 18876/18876 co-relation queries the response was YES. [2024-02-07 14:43:23,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13274 conditions, 1395 events. 727/1395 cut-off events. For 18876/18876 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7874 event pairs, 8 based on Foata normal form. 13/1406 useless extension candidates. Maximal degree in co-relation 12755. Up to 884 conditions per place. [2024-02-07 14:43:23,160 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 284 selfloop transitions, 133 changer transitions 27/447 dead transitions. [2024-02-07 14:43:23,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 447 transitions, 9830 flow [2024-02-07 14:43:23,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-07 14:43:23,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-07 14:43:23,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 172 transitions. [2024-02-07 14:43:23,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-02-07 14:43:23,177 INFO L175 Difference]: Start difference. First operand has 214 places, 320 transitions, 6585 flow. Second operand 14 states and 172 transitions. [2024-02-07 14:43:23,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 447 transitions, 9830 flow [2024-02-07 14:43:23,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 447 transitions, 9686 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-02-07 14:43:23,277 INFO L231 Difference]: Finished difference. Result has 233 places, 380 transitions, 8221 flow [2024-02-07 14:43:23,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6463, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8221, PETRI_PLACES=233, PETRI_TRANSITIONS=380} [2024-02-07 14:43:23,278 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 210 predicate places. [2024-02-07 14:43:23,279 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 380 transitions, 8221 flow [2024-02-07 14:43:23,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.642857142857142) internal successors, (121), 14 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:23,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:23,279 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:23,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:23,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-02-07 14:43:23,491 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:23,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:23,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1853130712, now seen corresponding path program 21 times [2024-02-07 14:43:23,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:23,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182426564] [2024-02-07 14:43:23,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:23,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:23,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:23,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182426564] [2024-02-07 14:43:23,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182426564] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:23,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943854854] [2024-02-07 14:43:23,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:43:23,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:23,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:23,583 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:23,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-02-07 14:43:23,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-07 14:43:23,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:23,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:43:23,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-07 14:43:23,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:43:23,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943854854] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:23,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:43:23,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2024-02-07 14:43:23,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753702042] [2024-02-07 14:43:23,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:23,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:43:23,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:23,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:43:23,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:43:23,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:23,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 380 transitions, 8221 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 14:43:23,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:23,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:23,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:24,026 INFO L124 PetriNetUnfolderBase]: 737/1556 cut-off events. [2024-02-07 14:43:24,026 INFO L125 PetriNetUnfolderBase]: For 26530/26530 co-relation queries the response was YES. [2024-02-07 14:43:24,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15094 conditions, 1556 events. 737/1556 cut-off events. For 26530/26530 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 9850 event pairs, 12 based on Foata normal form. 16/1569 useless extension candidates. Maximal degree in co-relation 14502. Up to 1009 conditions per place. [2024-02-07 14:43:24,040 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 362 selfloop transitions, 33 changer transitions 31/429 dead transitions. [2024-02-07 14:43:24,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 429 transitions, 9892 flow [2024-02-07 14:43:24,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:43:24,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:43:24,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2024-02-07 14:43:24,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-02-07 14:43:24,041 INFO L175 Difference]: Start difference. First operand has 233 places, 380 transitions, 8221 flow. Second operand 6 states and 71 transitions. [2024-02-07 14:43:24,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 429 transitions, 9892 flow [2024-02-07 14:43:24,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 429 transitions, 9380 flow, removed 249 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:24,227 INFO L231 Difference]: Finished difference. Result has 240 places, 372 transitions, 7651 flow [2024-02-07 14:43:24,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7743, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7651, PETRI_PLACES=240, PETRI_TRANSITIONS=372} [2024-02-07 14:43:24,228 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 217 predicate places. [2024-02-07 14:43:24,229 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 372 transitions, 7651 flow [2024-02-07 14:43:24,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 14:43:24,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:24,229 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:24,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:24,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-02-07 14:43:24,441 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:24,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:24,442 INFO L85 PathProgramCache]: Analyzing trace with hash -591198992, now seen corresponding path program 22 times [2024-02-07 14:43:24,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:24,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288036517] [2024-02-07 14:43:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:24,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:24,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:24,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288036517] [2024-02-07 14:43:24,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288036517] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:24,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458964680] [2024-02-07 14:43:24,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:43:24,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:24,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:24,518 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:24,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-02-07 14:43:24,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:43:24,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:24,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:43:24,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:24,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:43:24,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458964680] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:24,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:24,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 19 [2024-02-07 14:43:24,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393408056] [2024-02-07 14:43:24,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:24,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-07 14:43:24,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:24,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-07 14:43:24,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2024-02-07 14:43:24,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-02-07 14:43:24,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 372 transitions, 7651 flow. Second operand has 19 states, 19 states have (on average 7.473684210526316) internal successors, (142), 19 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 14:43:24,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:24,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-02-07 14:43:24,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:25,273 INFO L124 PetriNetUnfolderBase]: 810/1580 cut-off events. [2024-02-07 14:43:25,273 INFO L125 PetriNetUnfolderBase]: For 26766/26766 co-relation queries the response was YES. [2024-02-07 14:43:25,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14928 conditions, 1580 events. 810/1580 cut-off events. For 26766/26766 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9282 event pairs, 44 based on Foata normal form. 31/1609 useless extension candidates. Maximal degree in co-relation 14731. Up to 855 conditions per place. [2024-02-07 14:43:25,287 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 247 selfloop transitions, 219 changer transitions 14/483 dead transitions. [2024-02-07 14:43:25,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 483 transitions, 10456 flow [2024-02-07 14:43:25,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-07 14:43:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-07 14:43:25,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 177 transitions. [2024-02-07 14:43:25,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4957983193277311 [2024-02-07 14:43:25,288 INFO L175 Difference]: Start difference. First operand has 240 places, 372 transitions, 7651 flow. Second operand 17 states and 177 transitions. [2024-02-07 14:43:25,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 483 transitions, 10456 flow [2024-02-07 14:43:25,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 483 transitions, 10103 flow, removed 50 selfloop flow, removed 12 redundant places. [2024-02-07 14:43:25,485 INFO L231 Difference]: Finished difference. Result has 247 places, 437 transitions, 9480 flow [2024-02-07 14:43:25,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7220, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9480, PETRI_PLACES=247, PETRI_TRANSITIONS=437} [2024-02-07 14:43:25,486 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 224 predicate places. [2024-02-07 14:43:25,486 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 437 transitions, 9480 flow [2024-02-07 14:43:25,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.473684210526316) internal successors, (142), 19 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 14:43:25,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:25,486 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:25,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:25,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:25,699 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:25,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:25,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1346319358, now seen corresponding path program 23 times [2024-02-07 14:43:25,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:25,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507451499] [2024-02-07 14:43:25,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:25,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:25,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:25,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507451499] [2024-02-07 14:43:25,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507451499] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:25,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962503524] [2024-02-07 14:43:25,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:43:25,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:25,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:25,799 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:25,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-02-07 14:43:25,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-07 14:43:25,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:25,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:43:25,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:25,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:26,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 14:43:26,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962503524] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:26,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:26,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 20 [2024-02-07 14:43:26,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171880532] [2024-02-07 14:43:26,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:26,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-07 14:43:26,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:26,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-07 14:43:26,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2024-02-07 14:43:26,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:26,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 437 transitions, 9480 flow. Second operand has 20 states, 20 states have (on average 8.35) internal successors, (167), 20 states have internal predecessors, (167), 0 states have call successors, (0), 0 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 14:43:26,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:26,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:26,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:26,570 INFO L124 PetriNetUnfolderBase]: 892/1717 cut-off events. [2024-02-07 14:43:26,570 INFO L125 PetriNetUnfolderBase]: For 34325/34325 co-relation queries the response was YES. [2024-02-07 14:43:26,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17327 conditions, 1717 events. 892/1717 cut-off events. For 34325/34325 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 10100 event pairs, 46 based on Foata normal form. 1/1716 useless extension candidates. Maximal degree in co-relation 16740. Up to 1303 conditions per place. [2024-02-07 14:43:26,589 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 373 selfloop transitions, 135 changer transitions 6/517 dead transitions. [2024-02-07 14:43:26,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 517 transitions, 12193 flow [2024-02-07 14:43:26,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 14:43:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 14:43:26,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 134 transitions. [2024-02-07 14:43:26,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4908424908424908 [2024-02-07 14:43:26,591 INFO L175 Difference]: Start difference. First operand has 247 places, 437 transitions, 9480 flow. Second operand 13 states and 134 transitions. [2024-02-07 14:43:26,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 517 transitions, 12193 flow [2024-02-07 14:43:26,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 517 transitions, 11512 flow, removed 317 selfloop flow, removed 4 redundant places. [2024-02-07 14:43:26,870 INFO L231 Difference]: Finished difference. Result has 255 places, 494 transitions, 10601 flow [2024-02-07 14:43:26,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=9025, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10601, PETRI_PLACES=255, PETRI_TRANSITIONS=494} [2024-02-07 14:43:26,872 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 232 predicate places. [2024-02-07 14:43:26,872 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 494 transitions, 10601 flow [2024-02-07 14:43:26,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.35) internal successors, (167), 20 states have internal predecessors, (167), 0 states have call successors, (0), 0 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 14:43:26,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:26,872 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:26,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:27,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-02-07 14:43:27,084 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:27,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:27,085 INFO L85 PathProgramCache]: Analyzing trace with hash 814640896, now seen corresponding path program 24 times [2024-02-07 14:43:27,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:27,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145675889] [2024-02-07 14:43:27,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:27,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:27,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:27,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145675889] [2024-02-07 14:43:27,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145675889] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:27,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231877301] [2024-02-07 14:43:27,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 14:43:27,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:27,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:27,168 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:27,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-02-07 14:43:27,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-07 14:43:27,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:27,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-07 14:43:27,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:27,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:27,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231877301] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:27,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:27,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2024-02-07 14:43:27,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821904210] [2024-02-07 14:43:27,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:27,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-07 14:43:27,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:27,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-07 14:43:27,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2024-02-07 14:43:27,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-02-07 14:43:27,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 494 transitions, 10601 flow. Second operand has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 14:43:27,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:27,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-02-07 14:43:27,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:28,125 INFO L124 PetriNetUnfolderBase]: 937/1828 cut-off events. [2024-02-07 14:43:28,126 INFO L125 PetriNetUnfolderBase]: For 39912/39912 co-relation queries the response was YES. [2024-02-07 14:43:28,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18387 conditions, 1828 events. 937/1828 cut-off events. For 39912/39912 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11061 event pairs, 6 based on Foata normal form. 6/1832 useless extension candidates. Maximal degree in co-relation 17752. Up to 663 conditions per place. [2024-02-07 14:43:28,143 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 157 selfloop transitions, 419 changer transitions 5/584 dead transitions. [2024-02-07 14:43:28,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 584 transitions, 13114 flow [2024-02-07 14:43:28,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-07 14:43:28,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-07 14:43:28,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 218 transitions. [2024-02-07 14:43:28,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45134575569358176 [2024-02-07 14:43:28,145 INFO L175 Difference]: Start difference. First operand has 255 places, 494 transitions, 10601 flow. Second operand 23 states and 218 transitions. [2024-02-07 14:43:28,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 584 transitions, 13114 flow [2024-02-07 14:43:28,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 584 transitions, 12966 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-02-07 14:43:28,444 INFO L231 Difference]: Finished difference. Result has 280 places, 524 transitions, 12941 flow [2024-02-07 14:43:28,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=10453, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12941, PETRI_PLACES=280, PETRI_TRANSITIONS=524} [2024-02-07 14:43:28,446 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 257 predicate places. [2024-02-07 14:43:28,446 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 524 transitions, 12941 flow [2024-02-07 14:43:28,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 14:43:28,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:28,446 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:28,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-02-07 14:43:28,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:28,658 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:28,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:28,658 INFO L85 PathProgramCache]: Analyzing trace with hash 829187957, now seen corresponding path program 25 times [2024-02-07 14:43:28,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:28,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567315284] [2024-02-07 14:43:28,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:28,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 14:43:28,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:28,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567315284] [2024-02-07 14:43:28,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567315284] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:28,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037376353] [2024-02-07 14:43:28,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 14:43:28,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:28,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:28,753 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:28,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-02-07 14:43:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:28,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-07 14:43:28,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:28,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:28,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037376353] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:28,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:28,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2024-02-07 14:43:28,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087804059] [2024-02-07 14:43:28,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:28,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-07 14:43:28,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:28,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-07 14:43:28,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2024-02-07 14:43:29,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:29,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 524 transitions, 12941 flow. Second operand has 21 states, 21 states have (on average 8.047619047619047) internal successors, (169), 21 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 14:43:29,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:29,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:29,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:29,874 INFO L124 PetriNetUnfolderBase]: 1199/2256 cut-off events. [2024-02-07 14:43:29,875 INFO L125 PetriNetUnfolderBase]: For 69192/69192 co-relation queries the response was YES. [2024-02-07 14:43:29,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25321 conditions, 2256 events. 1199/2256 cut-off events. For 69192/69192 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 13692 event pairs, 44 based on Foata normal form. 28/2282 useless extension candidates. Maximal degree in co-relation 24477. Up to 845 conditions per place. [2024-02-07 14:43:29,899 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 374 selfloop transitions, 336 changer transitions 32/745 dead transitions. [2024-02-07 14:43:29,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 745 transitions, 19126 flow [2024-02-07 14:43:29,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-07 14:43:29,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-07 14:43:29,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 268 transitions. [2024-02-07 14:43:29,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4908424908424908 [2024-02-07 14:43:29,901 INFO L175 Difference]: Start difference. First operand has 280 places, 524 transitions, 12941 flow. Second operand 26 states and 268 transitions. [2024-02-07 14:43:29,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 745 transitions, 19126 flow [2024-02-07 14:43:30,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 745 transitions, 18246 flow, removed 433 selfloop flow, removed 5 redundant places. [2024-02-07 14:43:30,434 INFO L231 Difference]: Finished difference. Result has 304 places, 657 transitions, 16250 flow [2024-02-07 14:43:30,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=12527, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=16250, PETRI_PLACES=304, PETRI_TRANSITIONS=657} [2024-02-07 14:43:30,435 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 281 predicate places. [2024-02-07 14:43:30,435 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 657 transitions, 16250 flow [2024-02-07 14:43:30,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.047619047619047) internal successors, (169), 21 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 14:43:30,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:30,435 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:30,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:30,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-02-07 14:43:30,648 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:30,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:30,648 INFO L85 PathProgramCache]: Analyzing trace with hash -628338584, now seen corresponding path program 26 times [2024-02-07 14:43:30,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:30,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584132201] [2024-02-07 14:43:30,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:30,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:30,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:30,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:30,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584132201] [2024-02-07 14:43:30,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584132201] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:30,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057839803] [2024-02-07 14:43:30,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:43:30,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:30,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:30,732 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:30,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-02-07 14:43:30,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:43:30,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:30,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-07 14:43:30,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:30,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:30,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057839803] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:30,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:30,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 20 [2024-02-07 14:43:30,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477782195] [2024-02-07 14:43:30,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:30,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-07 14:43:30,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:30,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-07 14:43:30,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2024-02-07 14:43:31,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-02-07 14:43:31,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 657 transitions, 16250 flow. Second operand has 20 states, 20 states have (on average 7.05) internal successors, (141), 20 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:31,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:31,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-02-07 14:43:31,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:31,855 INFO L124 PetriNetUnfolderBase]: 1173/2192 cut-off events. [2024-02-07 14:43:31,855 INFO L125 PetriNetUnfolderBase]: For 43697/43697 co-relation queries the response was YES. [2024-02-07 14:43:31,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23748 conditions, 2192 events. 1173/2192 cut-off events. For 43697/43697 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 13050 event pairs, 4 based on Foata normal form. 8/2198 useless extension candidates. Maximal degree in co-relation 23071. Up to 881 conditions per place. [2024-02-07 14:43:31,876 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 275 selfloop transitions, 445 changer transitions 2/725 dead transitions. [2024-02-07 14:43:31,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 725 transitions, 18477 flow [2024-02-07 14:43:31,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-07 14:43:31,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-07 14:43:31,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 199 transitions. [2024-02-07 14:43:31,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43073593073593075 [2024-02-07 14:43:31,877 INFO L175 Difference]: Start difference. First operand has 304 places, 657 transitions, 16250 flow. Second operand 22 states and 199 transitions. [2024-02-07 14:43:31,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 725 transitions, 18477 flow [2024-02-07 14:43:32,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 725 transitions, 17245 flow, removed 485 selfloop flow, removed 11 redundant places. [2024-02-07 14:43:32,241 INFO L231 Difference]: Finished difference. Result has 320 places, 679 transitions, 17317 flow [2024-02-07 14:43:32,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=15011, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=17317, PETRI_PLACES=320, PETRI_TRANSITIONS=679} [2024-02-07 14:43:32,242 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 297 predicate places. [2024-02-07 14:43:32,243 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 679 transitions, 17317 flow [2024-02-07 14:43:32,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.05) internal successors, (141), 20 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:32,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:32,243 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:32,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:32,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:32,454 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:32,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:32,454 INFO L85 PathProgramCache]: Analyzing trace with hash -94374953, now seen corresponding path program 27 times [2024-02-07 14:43:32,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:32,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105969520] [2024-02-07 14:43:32,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:32,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:32,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 14:43:32,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:32,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105969520] [2024-02-07 14:43:32,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105969520] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:32,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622743937] [2024-02-07 14:43:32,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:43:32,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:32,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:32,506 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:32,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-02-07 14:43:32,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 14:43:32,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:32,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:43:32,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-07 14:43:32,608 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:43:32,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622743937] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:32,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:43:32,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-02-07 14:43:32,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87657973] [2024-02-07 14:43:32,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:32,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:43:32,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:32,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:43:32,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-02-07 14:43:32,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:32,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 679 transitions, 17317 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 14:43:32,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:32,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:32,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:33,186 INFO L124 PetriNetUnfolderBase]: 1170/2140 cut-off events. [2024-02-07 14:43:33,187 INFO L125 PetriNetUnfolderBase]: For 28766/28766 co-relation queries the response was YES. [2024-02-07 14:43:33,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23574 conditions, 2140 events. 1170/2140 cut-off events. For 28766/28766 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12585 event pairs, 12 based on Foata normal form. 23/2158 useless extension candidates. Maximal degree in co-relation 23217. Up to 1606 conditions per place. [2024-02-07 14:43:33,205 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 21 selfloop transitions, 3 changer transitions 674/701 dead transitions. [2024-02-07 14:43:33,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 701 transitions, 18994 flow [2024-02-07 14:43:33,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:43:33,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:43:33,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 66 transitions. [2024-02-07 14:43:33,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-02-07 14:43:33,208 INFO L175 Difference]: Start difference. First operand has 320 places, 679 transitions, 17317 flow. Second operand 6 states and 66 transitions. [2024-02-07 14:43:33,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 701 transitions, 18994 flow [2024-02-07 14:43:33,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 701 transitions, 18644 flow, removed 73 selfloop flow, removed 10 redundant places. [2024-02-07 14:43:33,551 INFO L231 Difference]: Finished difference. Result has 314 places, 26 transitions, 408 flow [2024-02-07 14:43:33,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=16943, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=408, PETRI_PLACES=314, PETRI_TRANSITIONS=26} [2024-02-07 14:43:33,552 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 291 predicate places. [2024-02-07 14:43:33,552 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 26 transitions, 408 flow [2024-02-07 14:43:33,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 14:43:33,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:33,552 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:33,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:33,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:33,763 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:33,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:33,764 INFO L85 PathProgramCache]: Analyzing trace with hash -935597979, now seen corresponding path program 28 times [2024-02-07 14:43:33,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:33,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878440895] [2024-02-07 14:43:33,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:33,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:33,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:33,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878440895] [2024-02-07 14:43:33,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878440895] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:33,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568644565] [2024-02-07 14:43:33,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:43:33,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:33,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:33,889 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:33,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-02-07 14:43:33,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:43:33,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:33,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2024-02-07 14:43:33,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:34,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 14:43:34,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568644565] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:34,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:34,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 7] total 25 [2024-02-07 14:43:34,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330493483] [2024-02-07 14:43:34,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:34,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-07 14:43:34,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:34,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-07 14:43:34,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2024-02-07 14:43:34,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:34,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 26 transitions, 408 flow. Second operand has 25 states, 25 states have (on average 8.12) internal successors, (203), 25 states have internal predecessors, (203), 0 states have call successors, (0), 0 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 14:43:34,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:34,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:34,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:34,467 INFO L124 PetriNetUnfolderBase]: 53/127 cut-off events. [2024-02-07 14:43:34,467 INFO L125 PetriNetUnfolderBase]: For 6878/6878 co-relation queries the response was YES. [2024-02-07 14:43:34,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1484 conditions, 127 events. 53/127 cut-off events. For 6878/6878 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 282 event pairs, 0 based on Foata normal form. 1/127 useless extension candidates. Maximal degree in co-relation 1392. Up to 27 conditions per place. [2024-02-07 14:43:34,469 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 38 selfloop transitions, 16 changer transitions 11/68 dead transitions. [2024-02-07 14:43:34,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 68 transitions, 1038 flow [2024-02-07 14:43:34,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-07 14:43:34,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-07 14:43:34,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 159 transitions. [2024-02-07 14:43:34,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-02-07 14:43:34,470 INFO L175 Difference]: Start difference. First operand has 314 places, 26 transitions, 408 flow. Second operand 16 states and 159 transitions. [2024-02-07 14:43:34,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 68 transitions, 1038 flow [2024-02-07 14:43:34,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 68 transitions, 478 flow, removed 170 selfloop flow, removed 94 redundant places. [2024-02-07 14:43:34,475 INFO L231 Difference]: Finished difference. Result has 97 places, 33 transitions, 227 flow [2024-02-07 14:43:34,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=227, PETRI_PLACES=97, PETRI_TRANSITIONS=33} [2024-02-07 14:43:34,475 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 74 predicate places. [2024-02-07 14:43:34,475 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 33 transitions, 227 flow [2024-02-07 14:43:34,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.12) internal successors, (203), 25 states have internal predecessors, (203), 0 states have call successors, (0), 0 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 14:43:34,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:34,476 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:34,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:34,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:34,687 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:34,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:34,687 INFO L85 PathProgramCache]: Analyzing trace with hash -223456835, now seen corresponding path program 29 times [2024-02-07 14:43:34,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:34,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794635862] [2024-02-07 14:43:34,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:34,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:34,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:34,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794635862] [2024-02-07 14:43:34,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794635862] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:34,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052736501] [2024-02-07 14:43:34,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:43:34,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:34,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:34,756 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:34,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-02-07 14:43:34,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-02-07 14:43:34,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:34,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-07 14:43:34,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:34,931 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:34,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:35,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052736501] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:35,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:35,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 26 [2024-02-07 14:43:35,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574427728] [2024-02-07 14:43:35,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:35,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-07 14:43:35,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:35,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-07 14:43:35,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2024-02-07 14:43:35,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-02-07 14:43:35,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 33 transitions, 227 flow. Second operand has 26 states, 26 states have (on average 6.884615384615385) internal successors, (179), 26 states have internal predecessors, (179), 0 states have call successors, (0), 0 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 14:43:35,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:35,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-02-07 14:43:35,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:35,215 INFO L124 PetriNetUnfolderBase]: 49/127 cut-off events. [2024-02-07 14:43:35,215 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2024-02-07 14:43:35,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 724 conditions, 127 events. 49/127 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 307 event pairs, 0 based on Foata normal form. 4/130 useless extension candidates. Maximal degree in co-relation 689. Up to 39 conditions per place. [2024-02-07 14:43:35,216 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 35 selfloop transitions, 9 changer transitions 18/65 dead transitions. [2024-02-07 14:43:35,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 65 transitions, 511 flow [2024-02-07 14:43:35,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-07 14:43:35,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-07 14:43:35,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 126 transitions. [2024-02-07 14:43:35,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-02-07 14:43:35,217 INFO L175 Difference]: Start difference. First operand has 97 places, 33 transitions, 227 flow. Second operand 14 states and 126 transitions. [2024-02-07 14:43:35,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 65 transitions, 511 flow [2024-02-07 14:43:35,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 65 transitions, 478 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-02-07 14:43:35,219 INFO L231 Difference]: Finished difference. Result has 103 places, 28 transitions, 182 flow [2024-02-07 14:43:35,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=182, PETRI_PLACES=103, PETRI_TRANSITIONS=28} [2024-02-07 14:43:35,219 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 80 predicate places. [2024-02-07 14:43:35,219 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 28 transitions, 182 flow [2024-02-07 14:43:35,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.884615384615385) internal successors, (179), 26 states have internal predecessors, (179), 0 states have call successors, (0), 0 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 14:43:35,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:35,220 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:35,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-02-07 14:43:35,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-02-07 14:43:35,431 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:35,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:35,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1224317500, now seen corresponding path program 30 times [2024-02-07 14:43:35,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:35,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344797491] [2024-02-07 14:43:35,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:35,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:35,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:35,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344797491] [2024-02-07 14:43:35,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344797491] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:35,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378887974] [2024-02-07 14:43:35,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 14:43:35,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:35,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:35,611 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:35,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-02-07 14:43:35,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-07 14:43:35,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:35,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:43:35,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-02-07 14:43:35,734 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:43:35,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378887974] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:35,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:43:35,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 18 [2024-02-07 14:43:35,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799331736] [2024-02-07 14:43:35,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:35,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:43:35,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:35,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:43:35,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2024-02-07 14:43:35,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:35,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 28 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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 14:43:35,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:35,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:35,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:35,785 INFO L124 PetriNetUnfolderBase]: 33/93 cut-off events. [2024-02-07 14:43:35,785 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2024-02-07 14:43:35,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 93 events. 33/93 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 168 event pairs, 0 based on Foata normal form. 1/93 useless extension candidates. Maximal degree in co-relation 422. Up to 39 conditions per place. [2024-02-07 14:43:35,786 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 24 selfloop transitions, 5 changer transitions 5/37 dead transitions. [2024-02-07 14:43:35,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 37 transitions, 271 flow [2024-02-07 14:43:35,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:43:35,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:43:35,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2024-02-07 14:43:35,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-02-07 14:43:35,787 INFO L175 Difference]: Start difference. First operand has 103 places, 28 transitions, 182 flow. Second operand 6 states and 63 transitions. [2024-02-07 14:43:35,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 37 transitions, 271 flow [2024-02-07 14:43:35,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 37 transitions, 251 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-02-07 14:43:35,789 INFO L231 Difference]: Finished difference. Result has 91 places, 27 transitions, 151 flow [2024-02-07 14:43:35,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=151, PETRI_PLACES=91, PETRI_TRANSITIONS=27} [2024-02-07 14:43:35,790 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 68 predicate places. [2024-02-07 14:43:35,790 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 27 transitions, 151 flow [2024-02-07 14:43:35,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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 14:43:35,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:35,790 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:35,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:36,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-02-07 14:43:36,003 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:36,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:36,004 INFO L85 PathProgramCache]: Analyzing trace with hash -875315836, now seen corresponding path program 31 times [2024-02-07 14:43:36,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:36,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803251748] [2024-02-07 14:43:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:36,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:36,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:36,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803251748] [2024-02-07 14:43:36,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803251748] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:36,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211080951] [2024-02-07 14:43:36,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 14:43:36,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:36,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:36,239 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:36,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-02-07 14:43:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:36,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-07 14:43:36,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:36,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 14:43:36,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211080951] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:36,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:36,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 8] total 30 [2024-02-07 14:43:36,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246591641] [2024-02-07 14:43:36,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:36,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-02-07 14:43:36,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:36,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-02-07 14:43:36,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2024-02-07 14:43:36,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:36,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 27 transitions, 151 flow. Second operand has 30 states, 30 states have (on average 7.966666666666667) internal successors, (239), 30 states have internal predecessors, (239), 0 states have call successors, (0), 0 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 14:43:36,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:36,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:36,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:36,964 INFO L124 PetriNetUnfolderBase]: 48/138 cut-off events. [2024-02-07 14:43:36,964 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2024-02-07 14:43:36,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 639 conditions, 138 events. 48/138 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 358 event pairs, 0 based on Foata normal form. 1/138 useless extension candidates. Maximal degree in co-relation 603. Up to 27 conditions per place. [2024-02-07 14:43:36,965 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 42 selfloop transitions, 19 changer transitions 15/79 dead transitions. [2024-02-07 14:43:36,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 79 transitions, 545 flow [2024-02-07 14:43:36,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-07 14:43:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-07 14:43:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 191 transitions. [2024-02-07 14:43:36,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47869674185463656 [2024-02-07 14:43:36,966 INFO L175 Difference]: Start difference. First operand has 91 places, 27 transitions, 151 flow. Second operand 19 states and 191 transitions. [2024-02-07 14:43:36,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 79 transitions, 545 flow [2024-02-07 14:43:36,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 79 transitions, 529 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-02-07 14:43:36,967 INFO L231 Difference]: Finished difference. Result has 107 places, 35 transitions, 249 flow [2024-02-07 14:43:36,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=249, PETRI_PLACES=107, PETRI_TRANSITIONS=35} [2024-02-07 14:43:36,968 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 84 predicate places. [2024-02-07 14:43:36,968 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 35 transitions, 249 flow [2024-02-07 14:43:36,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.966666666666667) internal successors, (239), 30 states have internal predecessors, (239), 0 states have call successors, (0), 0 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 14:43:36,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:36,968 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:36,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:37,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:37,181 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:37,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:37,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1635913750, now seen corresponding path program 32 times [2024-02-07 14:43:37,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:37,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395631994] [2024-02-07 14:43:37,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:37,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:37,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:37,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395631994] [2024-02-07 14:43:37,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395631994] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:37,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238825526] [2024-02-07 14:43:37,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:43:37,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:37,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:37,268 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:37,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-02-07 14:43:37,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:43:37,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:37,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 14:43:37,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:37,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:37,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238825526] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:37,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:37,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 31 [2024-02-07 14:43:37,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825038574] [2024-02-07 14:43:37,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:37,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-02-07 14:43:37,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:37,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-02-07 14:43:37,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2024-02-07 14:43:37,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-02-07 14:43:37,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 35 transitions, 249 flow. Second operand has 31 states, 31 states have (on average 6.774193548387097) internal successors, (210), 31 states have internal predecessors, (210), 0 states have call successors, (0), 0 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 14:43:37,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:37,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-02-07 14:43:37,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:37,862 INFO L124 PetriNetUnfolderBase]: 48/142 cut-off events. [2024-02-07 14:43:37,863 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2024-02-07 14:43:37,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 142 events. 48/142 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 387 event pairs, 0 based on Foata normal form. 4/145 useless extension candidates. Maximal degree in co-relation 682. Up to 47 conditions per place. [2024-02-07 14:43:37,864 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 36 selfloop transitions, 9 changer transitions 26/74 dead transitions. [2024-02-07 14:43:37,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 74 transitions, 566 flow [2024-02-07 14:43:37,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-07 14:43:37,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-07 14:43:37,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 151 transitions. [2024-02-07 14:43:37,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42296918767507 [2024-02-07 14:43:37,865 INFO L175 Difference]: Start difference. First operand has 107 places, 35 transitions, 249 flow. Second operand 17 states and 151 transitions. [2024-02-07 14:43:37,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 74 transitions, 566 flow [2024-02-07 14:43:37,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 74 transitions, 514 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-02-07 14:43:37,867 INFO L231 Difference]: Finished difference. Result has 114 places, 29 transitions, 180 flow [2024-02-07 14:43:37,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=180, PETRI_PLACES=114, PETRI_TRANSITIONS=29} [2024-02-07 14:43:37,868 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 91 predicate places. [2024-02-07 14:43:37,868 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 29 transitions, 180 flow [2024-02-07 14:43:37,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.774193548387097) internal successors, (210), 31 states have internal predecessors, (210), 0 states have call successors, (0), 0 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 14:43:37,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:37,869 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:37,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:38,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-02-07 14:43:38,084 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:43:38,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:38,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1491911433, now seen corresponding path program 33 times [2024-02-07 14:43:38,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:38,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502138814] [2024-02-07 14:43:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:38,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:38,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:38,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:38,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502138814] [2024-02-07 14:43:38,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502138814] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:38,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067032018] [2024-02-07 14:43:38,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:43:38,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:38,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:38,243 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:38,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-02-07 14:43:38,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-07 14:43:38,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:38,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:43:38,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-07 14:43:38,360 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:43:38,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067032018] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:38,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:43:38,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [16] total 20 [2024-02-07 14:43:38,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24739159] [2024-02-07 14:43:38,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:38,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:43:38,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:38,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:43:38,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2024-02-07 14:43:38,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-02-07 14:43:38,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 29 transitions, 180 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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 14:43:38,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:38,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-02-07 14:43:38,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:38,396 INFO L124 PetriNetUnfolderBase]: 35/98 cut-off events. [2024-02-07 14:43:38,396 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2024-02-07 14:43:38,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 98 events. 35/98 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 184 event pairs, 0 based on Foata normal form. 1/98 useless extension candidates. Maximal degree in co-relation 413. Up to 46 conditions per place. [2024-02-07 14:43:38,397 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 0 selfloop transitions, 0 changer transitions 36/36 dead transitions. [2024-02-07 14:43:38,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 36 transitions, 275 flow [2024-02-07 14:43:38,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:43:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:43:38,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 61 transitions. [2024-02-07 14:43:38,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-02-07 14:43:38,398 INFO L175 Difference]: Start difference. First operand has 114 places, 29 transitions, 180 flow. Second operand 6 states and 61 transitions. [2024-02-07 14:43:38,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 36 transitions, 275 flow [2024-02-07 14:43:38,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 36 transitions, 250 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-02-07 14:43:38,399 INFO L231 Difference]: Finished difference. Result has 95 places, 0 transitions, 0 flow [2024-02-07 14:43:38,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=95, PETRI_TRANSITIONS=0} [2024-02-07 14:43:38,400 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 72 predicate places. [2024-02-07 14:43:38,400 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 0 transitions, 0 flow [2024-02-07 14:43:38,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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 14:43:38,402 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-02-07 14:43:38,402 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-02-07 14:43:38,402 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-02-07 14:43:38,403 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-02-07 14:43:38,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:38,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-02-07 14:43:38,614 INFO L445 BasicCegarLoop]: Path program histogram: [33, 2, 2, 1, 1] [2024-02-07 14:43:38,617 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-02-07 14:43:38,617 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-02-07 14:43:38,620 INFO L503 ceAbstractionStarter]: Automizer considered 1 witness invariants [2024-02-07 14:43:38,620 INFO L504 ceAbstractionStarter]: WitnessConsidered=1 [2024-02-07 14:43:38,621 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.02 02:43:38 BasicIcfg [2024-02-07 14:43:38,621 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-02-07 14:43:38,621 INFO L158 Benchmark]: Toolchain (without parser) took 34551.39ms. Allocated memory was 167.8MB in the beginning and 893.4MB in the end (delta: 725.6MB). Free memory was 91.1MB in the beginning and 618.4MB in the end (delta: -527.3MB). Peak memory consumption was 201.0MB. Max. memory is 16.1GB. [2024-02-07 14:43:38,621 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 167.8MB. Free memory was 119.8MB in the beginning and 119.6MB in the end (delta: 184.7kB). There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 14:43:38,621 INFO L158 Benchmark]: Witness Parser took 0.14ms. Allocated memory is still 167.8MB. Free memory is still 93.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 14:43:38,622 INFO L158 Benchmark]: CACSL2BoogieTranslator took 229.05ms. Allocated memory is still 167.8MB. Free memory was 90.9MB in the beginning and 77.8MB in the end (delta: 13.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-02-07 14:43:38,622 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.85ms. Allocated memory is still 167.8MB. Free memory was 77.6MB in the beginning and 76.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 14:43:38,622 INFO L158 Benchmark]: Boogie Preprocessor took 29.54ms. Allocated memory is still 167.8MB. Free memory was 76.1MB in the beginning and 74.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-07 14:43:38,622 INFO L158 Benchmark]: RCFGBuilder took 451.92ms. Allocated memory was 167.8MB in the beginning and 243.3MB in the end (delta: 75.5MB). Free memory was 74.1MB in the beginning and 194.4MB in the end (delta: -120.3MB). Peak memory consumption was 10.3MB. Max. memory is 16.1GB. [2024-02-07 14:43:38,622 INFO L158 Benchmark]: TraceAbstraction took 33804.94ms. Allocated memory was 243.3MB in the beginning and 893.4MB in the end (delta: 650.1MB). Free memory was 193.5MB in the beginning and 618.4MB in the end (delta: -424.8MB). Peak memory consumption was 226.3MB. Max. memory is 16.1GB. [2024-02-07 14:43:38,623 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 167.8MB. Free memory was 119.8MB in the beginning and 119.6MB in the end (delta: 184.7kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.14ms. Allocated memory is still 167.8MB. Free memory is still 93.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 229.05ms. Allocated memory is still 167.8MB. Free memory was 90.9MB in the beginning and 77.8MB in the end (delta: 13.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.85ms. Allocated memory is still 167.8MB. Free memory was 77.6MB in the beginning and 76.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 29.54ms. Allocated memory is still 167.8MB. Free memory was 76.1MB in the beginning and 74.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 451.92ms. Allocated memory was 167.8MB in the beginning and 243.3MB in the end (delta: 75.5MB). Free memory was 74.1MB in the beginning and 194.4MB in the end (delta: -120.3MB). Peak memory consumption was 10.3MB. Max. memory is 16.1GB. * TraceAbstraction took 33804.94ms. Allocated memory was 243.3MB in the beginning and 893.4MB in the end (delta: 650.1MB). Free memory was 193.5MB in the beginning and 618.4MB in the end (delta: -424.8MB). Peak memory consumption was 226.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 59]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 70]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 28 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 33.7s, OverallIterations: 39, TraceHistogramMax: 6, PathProgramHistogramMax: 33, EmptinessCheckTime: 0.0s, AutomataDifference: 15.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2682 SdHoareTripleChecker+Valid, 4.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2625 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 3.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 542 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8529 IncrementalHoareTripleChecker+Invalid, 9071 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 542 mSolverCounterUnsat, 1 mSDtfsCounter, 8529 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1733 GetRequests, 1018 SyntacticMatches, 20 SemanticMatches, 695 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4672 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17317occurred in iteration=32, InterpolantAutomatonStates: 480, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 1473 NumberOfCodeBlocks, 1457 NumberOfCodeBlocksAsserted, 122 NumberOfCheckSat, 1943 ConstructedInterpolants, 0 QuantifiedInterpolants, 8545 SizeOfPredicates, 6 NumberOfNonLiveVariables, 4614 ConjunctsInSsa, 308 ConjunctsInUnsatCore, 101 InterpolantComputations, 12 PerfectInterpolantSequences, 497/1188 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-02-07 14:43:38,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE