./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/bench-exp2x9.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/bench-exp2x9.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/bench-exp2x9.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/bench-exp2x9.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 14:28:28,872 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:28:28,941 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:28:28,949 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:28:28,949 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:28:28,972 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:28:28,975 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:28:28,976 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:28:28,976 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:28:28,979 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:28:28,980 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:28:28,980 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:28:28,980 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:28:28,981 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:28:28,981 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:28:28,982 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:28:28,982 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:28:28,982 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:28:28,982 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:28:28,982 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:28:28,983 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:28:28,983 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:28:28,983 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:28:28,983 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:28:28,984 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:28:28,984 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:28:28,984 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:28:28,984 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:28:28,985 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:28:28,985 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:28:28,986 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:28:28,986 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:28:28,986 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:28:28,986 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:28:28,986 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:28:28,986 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:28:28,987 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:28:28,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:28:28,987 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:28:28,987 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:28:28,987 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:28:28,988 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:28:28,988 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:28:28,988 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:28:29,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:28:29,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:28:29,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:28:29,215 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:28:29,216 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:28:29,217 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp2x9.wvr.c [2024-02-07 14:28:30,273 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:28:30,444 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:28:30,444 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp2x9.wvr.c [2024-02-07 14:28:30,450 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d157f0aad/b3646d9877e949a4b5667c64e76e6292/FLAG3dd3a87ea [2024-02-07 14:28:30,468 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d157f0aad/b3646d9877e949a4b5667c64e76e6292 [2024-02-07 14:28:30,470 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:28:30,470 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:28:30,471 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/bench-exp2x9.wvr.yml/witness.yml [2024-02-07 14:28:30,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:28:30,529 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:28:30,532 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:28:30,532 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:28:30,535 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:28:30,536 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:28:30" (1/2) ... [2024-02-07 14:28:30,537 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22c8e132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:28:30, skipping insertion in model container [2024-02-07 14:28:30,537 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:28:30" (1/2) ... [2024-02-07 14:28:30,538 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@79c4d544 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:28:30, skipping insertion in model container [2024-02-07 14:28:30,539 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:28:30" (2/2) ... [2024-02-07 14:28:30,539 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22c8e132 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:28:30, skipping insertion in model container [2024-02-07 14:28:30,539 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:28:30" (2/2) ... [2024-02-07 14:28:30,540 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:28:30,557 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:28:30,561 INFO L76 edCorrectnessWitness]: Location invariant before [L97-L97] ((((0LL - (long long )x1) + (long long )x3 >= 0LL) && ((long long )x1 + (long long )x3 >= 0LL)) && ((0LL - (long long )x1) - (long long )x3 >= 0LL)) && ((long long )x1 - (long long )x3 >= 0LL) [2024-02-07 14:28:30,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:28:30,710 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp2x9.wvr.c[2721,2734] [2024-02-07 14:28:30,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:28:30,722 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local [2024-02-07 14:28:30,765 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp2x9.wvr.c[2721,2734] [2024-02-07 14:28:30,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:28:30,778 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:28:30,780 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:28:30 WrapperNode [2024-02-07 14:28:30,780 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:28:30,781 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:28:30,781 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:28:30,781 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:28:30,787 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 02:28:30" (1/1) ... [2024-02-07 14:28:30,813 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 02:28:30" (1/1) ... [2024-02-07 14:28:30,834 INFO L138 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2024-02-07 14:28:30,839 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:28:30,840 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:28:30,841 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:28:30,841 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:28:30,849 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 02:28:30" (1/1) ... [2024-02-07 14:28:30,850 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 02:28:30" (1/1) ... [2024-02-07 14:28:30,861 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 02:28:30" (1/1) ... [2024-02-07 14:28:30,879 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-02-07 14:28:30,882 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 02:28:30" (1/1) ... [2024-02-07 14:28:30,882 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 02:28:30" (1/1) ... [2024-02-07 14:28:30,892 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 02:28:30" (1/1) ... [2024-02-07 14:28:30,899 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 02:28:30" (1/1) ... [2024-02-07 14:28:30,901 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 02:28:30" (1/1) ... [2024-02-07 14:28:30,905 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 02:28:30" (1/1) ... [2024-02-07 14:28:30,907 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:28:30,911 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:28:30,911 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:28:30,911 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:28:30,912 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 02:28:30" (1/1) ... [2024-02-07 14:28:30,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:28:30,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:28:30,970 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 14:28:30,989 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 14:28:31,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:28:31,006 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 14:28:31,006 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 14:28:31,007 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 14:28:31,007 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 14:28:31,007 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-07 14:28:31,007 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-07 14:28:31,007 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-02-07 14:28:31,007 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-02-07 14:28:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:28:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:28:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:28:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 14:28:31,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-07 14:28:31,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:28:31,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:28:31,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:28:31,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:28:31,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 14:28:31,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-07 14:28:31,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:28:31,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:28:31,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:28:31,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:28:31,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:28:31,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 14:28:31,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-07 14:28:31,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:28:31,013 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 14:28:31,122 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:28:31,124 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:28:31,336 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:28:31,336 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:28:31,461 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:28:31,462 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-02-07 14:28:31,462 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:28:31 BoogieIcfgContainer [2024-02-07 14:28:31,462 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:28:31,464 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:28:31,464 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:28:31,467 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:28:31,467 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:28:30" (1/4) ... [2024-02-07 14:28:31,467 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a827cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:28:31, skipping insertion in model container [2024-02-07 14:28:31,467 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:28:30" (2/4) ... [2024-02-07 14:28:31,468 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a827cc7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:28:31, skipping insertion in model container [2024-02-07 14:28:31,468 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 02:28:30" (3/4) ... [2024-02-07 14:28:31,468 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a827cc7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:28:31, skipping insertion in model container [2024-02-07 14:28:31,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:28:31" (4/4) ... [2024-02-07 14:28:31,469 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x9.wvr.c [2024-02-07 14:28:31,482 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:28:31,483 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-02-07 14:28:31,483 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:28:31,538 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-02-07 14:28:31,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 37 transitions, 102 flow [2024-02-07 14:28:31,592 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-02-07 14:28:31,593 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-07 14:28:31,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 33 events. 4/33 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 24 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2024-02-07 14:28:31,596 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 37 transitions, 102 flow [2024-02-07 14:28:31,598 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 32 transitions, 88 flow [2024-02-07 14:28:31,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:28:31,612 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;@2be0a927, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:28:31,612 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-02-07 14:28:31,614 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:28:31,615 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 14:28:31,615 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:28:31,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:28:31,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 14:28:31,616 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 14:28:31,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:28:31,620 INFO L85 PathProgramCache]: Analyzing trace with hash 12045, now seen corresponding path program 1 times [2024-02-07 14:28:31,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:28:31,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894788627] [2024-02-07 14:28:31,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:31,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:28:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:31,925 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 14:28:31,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:28:31,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894788627] [2024-02-07 14:28:31,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894788627] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:28:31,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:28:31,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:28:31,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822929326] [2024-02-07 14:28:31,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:28:31,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:28:31,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:28:32,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:28:32,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:28:32,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-02-07 14:28:32,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:32,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:28:32,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-02-07 14:28:32,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:28:32,198 INFO L124 PetriNetUnfolderBase]: 1112/1435 cut-off events. [2024-02-07 14:28:32,198 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-02-07 14:28:32,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2955 conditions, 1435 events. 1112/1435 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4688 event pairs, 516 based on Foata normal form. 0/812 useless extension candidates. Maximal degree in co-relation 2196. Up to 1394 conditions per place. [2024-02-07 14:28:32,209 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 24 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-02-07 14:28:32,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 31 transitions, 138 flow [2024-02-07 14:28:32,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:28:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:28:32,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-02-07 14:28:32,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2024-02-07 14:28:32,220 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 88 flow. Second operand 3 states and 54 transitions. [2024-02-07 14:28:32,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 31 transitions, 138 flow [2024-02-07 14:28:32,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 31 transitions, 122 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-02-07 14:28:32,225 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 74 flow [2024-02-07 14:28:32,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2024-02-07 14:28:32,229 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -7 predicate places. [2024-02-07 14:28:32,230 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 74 flow [2024-02-07 14:28:32,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:32,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:28:32,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:28:32,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:28:32,231 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 14:28:32,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:28:32,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1505603799, now seen corresponding path program 1 times [2024-02-07 14:28:32,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:28:32,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272832103] [2024-02-07 14:28:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:32,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:28:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:32,430 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 14:28:32,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:28:32,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272832103] [2024-02-07 14:28:32,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272832103] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:28:32,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:28:32,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:28:32,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820351103] [2024-02-07 14:28:32,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:28:32,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:28:32,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:28:32,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:28:32,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:28:32,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 14:28:32,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:32,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:28:32,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 14:28:32,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:28:32,639 INFO L124 PetriNetUnfolderBase]: 1537/1956 cut-off events. [2024-02-07 14:28:32,639 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-02-07 14:28:32,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3952 conditions, 1956 events. 1537/1956 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6381 event pairs, 141 based on Foata normal form. 1/1133 useless extension candidates. Maximal degree in co-relation 3943. Up to 1733 conditions per place. [2024-02-07 14:28:32,650 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 42 selfloop transitions, 5 changer transitions 1/53 dead transitions. [2024-02-07 14:28:32,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 221 flow [2024-02-07 14:28:32,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:28:32,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:28:32,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-02-07 14:28:32,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7117117117117117 [2024-02-07 14:28:32,652 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 74 flow. Second operand 3 states and 79 transitions. [2024-02-07 14:28:32,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 221 flow [2024-02-07 14:28:32,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 53 transitions, 217 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:28:32,654 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 103 flow [2024-02-07 14:28:32,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2024-02-07 14:28:32,655 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -6 predicate places. [2024-02-07 14:28:32,655 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 103 flow [2024-02-07 14:28:32,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:32,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:28:32,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:28:32,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:28:32,656 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 14:28:32,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:28:32,657 INFO L85 PathProgramCache]: Analyzing trace with hash 840485454, now seen corresponding path program 1 times [2024-02-07 14:28:32,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:28:32,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413835592] [2024-02-07 14:28:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:32,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:28:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:32,736 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 14:28:32,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:28:32,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413835592] [2024-02-07 14:28:32,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413835592] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:28:32,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:28:32,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:28:32,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782240150] [2024-02-07 14:28:32,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:28:32,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:28:32,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:28:32,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:28:32,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:28:32,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 14:28:32,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:32,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:28:32,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 14:28:32,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:28:32,983 INFO L124 PetriNetUnfolderBase]: 1837/2363 cut-off events. [2024-02-07 14:28:32,984 INFO L125 PetriNetUnfolderBase]: For 571/571 co-relation queries the response was YES. [2024-02-07 14:28:32,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5860 conditions, 2363 events. 1837/2363 cut-off events. For 571/571 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 8394 event pairs, 138 based on Foata normal form. 34/2389 useless extension candidates. Maximal degree in co-relation 1437. Up to 964 conditions per place. [2024-02-07 14:28:32,998 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 72 selfloop transitions, 11 changer transitions 0/88 dead transitions. [2024-02-07 14:28:32,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 88 transitions, 419 flow [2024-02-07 14:28:32,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:28:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:28:33,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-02-07 14:28:33,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6864864864864865 [2024-02-07 14:28:33,004 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 103 flow. Second operand 5 states and 127 transitions. [2024-02-07 14:28:33,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 88 transitions, 419 flow [2024-02-07 14:28:33,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 88 transitions, 411 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:28:33,007 INFO L231 Difference]: Finished difference. Result has 40 places, 42 transitions, 167 flow [2024-02-07 14:28:33,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=167, PETRI_PLACES=40, PETRI_TRANSITIONS=42} [2024-02-07 14:28:33,008 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2024-02-07 14:28:33,008 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 42 transitions, 167 flow [2024-02-07 14:28:33,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:33,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:28:33,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:28:33,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:28:33,009 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 14:28:33,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:28:33,010 INFO L85 PathProgramCache]: Analyzing trace with hash 558817433, now seen corresponding path program 1 times [2024-02-07 14:28:33,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:28:33,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867643091] [2024-02-07 14:28:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:33,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:28:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:33,132 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 14:28:33,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:28:33,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867643091] [2024-02-07 14:28:33,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867643091] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:28:33,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:28:33,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:28:33,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058466439] [2024-02-07 14:28:33,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:28:33,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:28:33,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:28:33,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:28:33,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:28:33,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 14:28:33,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 42 transitions, 167 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:33,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:28:33,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 14:28:33,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:28:33,383 INFO L124 PetriNetUnfolderBase]: 1779/2305 cut-off events. [2024-02-07 14:28:33,383 INFO L125 PetriNetUnfolderBase]: For 2031/2031 co-relation queries the response was YES. [2024-02-07 14:28:33,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6823 conditions, 2305 events. 1779/2305 cut-off events. For 2031/2031 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8301 event pairs, 118 based on Foata normal form. 58/2355 useless extension candidates. Maximal degree in co-relation 3191. Up to 906 conditions per place. [2024-02-07 14:28:33,395 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 72 selfloop transitions, 9 changer transitions 0/86 dead transitions. [2024-02-07 14:28:33,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 86 transitions, 448 flow [2024-02-07 14:28:33,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:28:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:28:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-02-07 14:28:33,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6810810810810811 [2024-02-07 14:28:33,397 INFO L175 Difference]: Start difference. First operand has 40 places, 42 transitions, 167 flow. Second operand 5 states and 126 transitions. [2024-02-07 14:28:33,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 86 transitions, 448 flow [2024-02-07 14:28:33,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 86 transitions, 448 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:28:33,400 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 183 flow [2024-02-07 14:28:33,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2024-02-07 14:28:33,401 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-02-07 14:28:33,401 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 183 flow [2024-02-07 14:28:33,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:33,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:28:33,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:28:33,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 14:28:33,402 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 14:28:33,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:28:33,402 INFO L85 PathProgramCache]: Analyzing trace with hash 779609550, now seen corresponding path program 2 times [2024-02-07 14:28:33,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:28:33,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480363558] [2024-02-07 14:28:33,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:33,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:28:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:33,464 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 14:28:33,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:28:33,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480363558] [2024-02-07 14:28:33,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480363558] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:28:33,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49167634] [2024-02-07 14:28:33,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:28:33,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:28:33,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:28:33,467 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 14:28:33,495 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 14:28:33,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:28:33,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:28:33,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-07 14:28:33,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:28:33,689 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 14:28:33,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:28:33,763 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 14:28:33,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49167634] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:28:33,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:28:33,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-02-07 14:28:33,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918149294] [2024-02-07 14:28:33,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:28:33,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:28:33,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:28:33,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:28:33,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-02-07 14:28:33,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 14:28:33,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:33,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:28:33,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 14:28:33,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:28:33,978 INFO L124 PetriNetUnfolderBase]: 1687/2223 cut-off events. [2024-02-07 14:28:33,978 INFO L125 PetriNetUnfolderBase]: For 2865/2865 co-relation queries the response was YES. [2024-02-07 14:28:33,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6944 conditions, 2223 events. 1687/2223 cut-off events. For 2865/2865 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 8431 event pairs, 431 based on Foata normal form. 70/2261 useless extension candidates. Maximal degree in co-relation 2931. Up to 1155 conditions per place. [2024-02-07 14:28:33,991 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 72 selfloop transitions, 9 changer transitions 0/86 dead transitions. [2024-02-07 14:28:33,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 86 transitions, 482 flow [2024-02-07 14:28:33,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:28:33,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:28:33,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-02-07 14:28:33,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6171171171171171 [2024-02-07 14:28:33,993 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 183 flow. Second operand 6 states and 137 transitions. [2024-02-07 14:28:33,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 86 transitions, 482 flow [2024-02-07 14:28:33,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 86 transitions, 471 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:28:33,997 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 224 flow [2024-02-07 14:28:33,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=224, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-02-07 14:28:33,998 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-02-07 14:28:33,998 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 224 flow [2024-02-07 14:28:33,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:33,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:28:33,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:28:34,013 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 14:28:34,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:28:34,214 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 14:28:34,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:28:34,214 INFO L85 PathProgramCache]: Analyzing trace with hash 853636706, now seen corresponding path program 1 times [2024-02-07 14:28:34,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:28:34,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734952370] [2024-02-07 14:28:34,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:34,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:28:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:34,273 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 14:28:34,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:28:34,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734952370] [2024-02-07 14:28:34,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734952370] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:28:34,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598802364] [2024-02-07 14:28:34,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:34,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:28:34,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:28:34,275 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 14:28:34,295 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 14:28:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:34,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-07 14:28:34,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:28:34,465 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 14:28:34,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:28:34,535 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 14:28:34,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598802364] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:28:34,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:28:34,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-02-07 14:28:34,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121570143] [2024-02-07 14:28:34,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:28:34,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:28:34,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:28:34,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:28:34,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-02-07 14:28:34,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 14:28:34,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 224 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 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 14:28:34,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:28:34,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 14:28:34,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:28:34,774 INFO L124 PetriNetUnfolderBase]: 2045/2783 cut-off events. [2024-02-07 14:28:34,774 INFO L125 PetriNetUnfolderBase]: For 6823/6827 co-relation queries the response was YES. [2024-02-07 14:28:34,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9756 conditions, 2783 events. 2045/2783 cut-off events. For 6823/6827 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11678 event pairs, 323 based on Foata normal form. 81/2812 useless extension candidates. Maximal degree in co-relation 5870. Up to 1205 conditions per place. [2024-02-07 14:28:34,791 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 102 selfloop transitions, 9 changer transitions 0/116 dead transitions. [2024-02-07 14:28:34,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 116 transitions, 849 flow [2024-02-07 14:28:34,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:28:34,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:28:34,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-02-07 14:28:34,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6081081081081081 [2024-02-07 14:28:34,792 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 224 flow. Second operand 6 states and 135 transitions. [2024-02-07 14:28:34,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 116 transitions, 849 flow [2024-02-07 14:28:34,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 116 transitions, 822 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-02-07 14:28:34,799 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 270 flow [2024-02-07 14:28:34,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-02-07 14:28:34,799 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 15 predicate places. [2024-02-07 14:28:34,799 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 270 flow [2024-02-07 14:28:34,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 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 14:28:34,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:28:34,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:28:34,811 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 14:28:35,011 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,SelfDestructingSolverStorable5 [2024-02-07 14:28:35,011 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 14:28:35,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:28:35,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1355857755, now seen corresponding path program 1 times [2024-02-07 14:28:35,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:28:35,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263652401] [2024-02-07 14:28:35,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:35,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:28:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:35,135 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 14:28:35,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:28:35,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263652401] [2024-02-07 14:28:35,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263652401] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:28:35,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:28:35,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:28:35,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851433602] [2024-02-07 14:28:35,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:28:35,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:28:35,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:28:35,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:28:35,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:28:35,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 14:28:35,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 270 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:35,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:28:35,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 14:28:35,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:28:35,378 INFO L124 PetriNetUnfolderBase]: 2003/2729 cut-off events. [2024-02-07 14:28:35,378 INFO L125 PetriNetUnfolderBase]: For 7498/7502 co-relation queries the response was YES. [2024-02-07 14:28:35,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11144 conditions, 2729 events. 2003/2729 cut-off events. For 7498/7502 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11120 event pairs, 75 based on Foata normal form. 43/2744 useless extension candidates. Maximal degree in co-relation 6830. Up to 1137 conditions per place. [2024-02-07 14:28:35,398 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 104 selfloop transitions, 11 changer transitions 0/120 dead transitions. [2024-02-07 14:28:35,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 120 transitions, 906 flow [2024-02-07 14:28:35,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:28:35,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:28:35,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-02-07 14:28:35,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6648648648648648 [2024-02-07 14:28:35,399 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 270 flow. Second operand 5 states and 123 transitions. [2024-02-07 14:28:35,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 120 transitions, 906 flow [2024-02-07 14:28:35,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 120 transitions, 904 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:28:35,409 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 333 flow [2024-02-07 14:28:35,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=333, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-02-07 14:28:35,410 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-02-07 14:28:35,410 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 333 flow [2024-02-07 14:28:35,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:35,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:28:35,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:28:35,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 14:28:35,411 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 14:28:35,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:28:35,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1091607834, now seen corresponding path program 2 times [2024-02-07 14:28:35,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:28:35,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557815865] [2024-02-07 14:28:35,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:35,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:28:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:35,465 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 14:28:35,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:28:35,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557815865] [2024-02-07 14:28:35,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557815865] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:28:35,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:28:35,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:28:35,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052578570] [2024-02-07 14:28:35,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:28:35,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:28:35,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:28:35,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:28:35,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:28:35,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 14:28:35,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 333 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:35,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:28:35,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 14:28:35,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:28:35,697 INFO L124 PetriNetUnfolderBase]: 1801/2441 cut-off events. [2024-02-07 14:28:35,697 INFO L125 PetriNetUnfolderBase]: For 7658/7662 co-relation queries the response was YES. [2024-02-07 14:28:35,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10687 conditions, 2441 events. 1801/2441 cut-off events. For 7658/7662 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9537 event pairs, 99 based on Foata normal form. 39/2452 useless extension candidates. Maximal degree in co-relation 6573. Up to 987 conditions per place. [2024-02-07 14:28:35,711 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 98 selfloop transitions, 10 changer transitions 4/117 dead transitions. [2024-02-07 14:28:35,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 117 transitions, 911 flow [2024-02-07 14:28:35,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:28:35,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:28:35,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-02-07 14:28:35,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6594594594594595 [2024-02-07 14:28:35,712 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 333 flow. Second operand 5 states and 122 transitions. [2024-02-07 14:28:35,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 117 transitions, 911 flow [2024-02-07 14:28:35,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 117 transitions, 898 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-02-07 14:28:35,721 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 335 flow [2024-02-07 14:28:35,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=335, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2024-02-07 14:28:35,722 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-02-07 14:28:35,722 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 335 flow [2024-02-07 14:28:35,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:35,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:28:35,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:28:35,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 14:28:35,723 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 14:28:35,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:28:35,723 INFO L85 PathProgramCache]: Analyzing trace with hash 303853281, now seen corresponding path program 2 times [2024-02-07 14:28:35,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:28:35,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588915010] [2024-02-07 14:28:35,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:35,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:28:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:35,780 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 14:28:35,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:28:35,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588915010] [2024-02-07 14:28:35,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588915010] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:28:35,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368125126] [2024-02-07 14:28:35,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:28:35,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:28:35,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:28:35,782 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 14:28:35,804 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 14:28:35,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:28:35,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:28:35,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-07 14:28:35,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:28:35,967 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 14:28:35,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:28:36,027 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 14:28:36,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368125126] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:28:36,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:28:36,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-02-07 14:28:36,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130835978] [2024-02-07 14:28:36,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:28:36,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:28:36,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:28:36,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:28:36,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-02-07 14:28:36,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 14:28:36,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 335 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:36,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:28:36,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 14:28:36,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:28:36,261 INFO L124 PetriNetUnfolderBase]: 1725/2377 cut-off events. [2024-02-07 14:28:36,261 INFO L125 PetriNetUnfolderBase]: For 7941/7945 co-relation queries the response was YES. [2024-02-07 14:28:36,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10732 conditions, 2377 events. 1725/2377 cut-off events. For 7941/7945 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9865 event pairs, 293 based on Foata normal form. 77/2414 useless extension candidates. Maximal degree in co-relation 6755. Up to 1307 conditions per place. [2024-02-07 14:28:36,275 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 101 selfloop transitions, 9 changer transitions 0/115 dead transitions. [2024-02-07 14:28:36,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 115 transitions, 925 flow [2024-02-07 14:28:36,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:28:36,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:28:36,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-02-07 14:28:36,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.581081081081081 [2024-02-07 14:28:36,277 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 335 flow. Second operand 6 states and 129 transitions. [2024-02-07 14:28:36,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 115 transitions, 925 flow [2024-02-07 14:28:36,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 115 transitions, 912 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-02-07 14:28:36,283 INFO L231 Difference]: Finished difference. Result has 69 places, 56 transitions, 374 flow [2024-02-07 14:28:36,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=374, PETRI_PLACES=69, PETRI_TRANSITIONS=56} [2024-02-07 14:28:36,284 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-02-07 14:28:36,284 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 56 transitions, 374 flow [2024-02-07 14:28:36,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:36,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:28:36,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:28:36,305 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 14:28:36,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:28:36,496 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 14:28:36,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:28:36,496 INFO L85 PathProgramCache]: Analyzing trace with hash -107751667, now seen corresponding path program 2 times [2024-02-07 14:28:36,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:28:36,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503026048] [2024-02-07 14:28:36,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:36,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:28:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:36,545 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 14:28:36,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:28:36,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503026048] [2024-02-07 14:28:36,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503026048] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:28:36,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:28:36,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:28:36,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108610945] [2024-02-07 14:28:36,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:28:36,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:28:36,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:28:36,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:28:36,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:28:36,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 14:28:36,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 56 transitions, 374 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:36,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:28:36,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 14:28:36,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:28:36,812 INFO L124 PetriNetUnfolderBase]: 1657/2292 cut-off events. [2024-02-07 14:28:36,812 INFO L125 PetriNetUnfolderBase]: For 8264/8288 co-relation queries the response was YES. [2024-02-07 14:28:36,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10968 conditions, 2292 events. 1657/2292 cut-off events. For 8264/8288 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9705 event pairs, 481 based on Foata normal form. 72/2348 useless extension candidates. Maximal degree in co-relation 9590. Up to 1331 conditions per place. [2024-02-07 14:28:36,828 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 118 selfloop transitions, 8 changer transitions 0/131 dead transitions. [2024-02-07 14:28:36,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 131 transitions, 1118 flow [2024-02-07 14:28:36,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:28:36,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:28:36,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-02-07 14:28:36,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6648648648648648 [2024-02-07 14:28:36,829 INFO L175 Difference]: Start difference. First operand has 69 places, 56 transitions, 374 flow. Second operand 5 states and 123 transitions. [2024-02-07 14:28:36,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 131 transitions, 1118 flow [2024-02-07 14:28:36,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 131 transitions, 1058 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-02-07 14:28:36,838 INFO L231 Difference]: Finished difference. Result has 72 places, 59 transitions, 409 flow [2024-02-07 14:28:36,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=409, PETRI_PLACES=72, PETRI_TRANSITIONS=59} [2024-02-07 14:28:36,839 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-02-07 14:28:36,839 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 59 transitions, 409 flow [2024-02-07 14:28:36,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:36,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:28:36,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:28:36,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-07 14:28:36,840 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 14:28:36,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:28:36,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1352856996, now seen corresponding path program 1 times [2024-02-07 14:28:36,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:28:36,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727925037] [2024-02-07 14:28:36,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:36,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:28:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:37,207 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 14:28:37,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:28:37,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727925037] [2024-02-07 14:28:37,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727925037] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:28:37,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694606131] [2024-02-07 14:28:37,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:37,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:28:37,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:28:37,224 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 14:28:37,288 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 14:28:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:37,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-07 14:28:37,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:30:08,569 WARN L293 SmtUtils]: Spent 9.24s on a formula simplification. DAG size of input: 34 DAG size of output: 32 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-07 14:30:29,637 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 14:30:29,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:30:36,218 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 14:30:36,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694606131] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:30:36,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:30:36,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-02-07 14:30:36,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443523669] [2024-02-07 14:30:36,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:30:36,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 14:30:36,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:30:36,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 14:30:36,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=168, Unknown=7, NotChecked=0, Total=240 [2024-02-07 14:30:40,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:30:40,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-02-07 14:30:40,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 59 transitions, 409 flow. Second operand has 16 states, 16 states have (on average 13.0) internal successors, (208), 16 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:30:40,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:30:40,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-02-07 14:30:40,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:30:46,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:30:59,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:31:12,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:31:17,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:31:21,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-07 14:31:25,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:31:33,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:31:35,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:31:37,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:31:40,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.60s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:31:41,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:31:54,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:31:57,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:32:00,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.53s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:32:02,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:32:06,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-07 14:32:11,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-07 14:32:13,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:32:15,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-07 14:32:16,079 INFO L124 PetriNetUnfolderBase]: 3087/4288 cut-off events. [2024-02-07 14:32:16,080 INFO L125 PetriNetUnfolderBase]: For 14802/14802 co-relation queries the response was YES. [2024-02-07 14:32:16,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20443 conditions, 4288 events. 3087/4288 cut-off events. For 14802/14802 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 19901 event pairs, 361 based on Foata normal form. 19/4295 useless extension candidates. Maximal degree in co-relation 18330. Up to 2347 conditions per place. [2024-02-07 14:32:16,133 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 206 selfloop transitions, 89 changer transitions 28/328 dead transitions. [2024-02-07 14:32:16,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 328 transitions, 2699 flow [2024-02-07 14:32:16,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-07 14:32:16,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-07 14:32:16,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 380 transitions. [2024-02-07 14:32:16,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6418918918918919 [2024-02-07 14:32:16,136 INFO L175 Difference]: Start difference. First operand has 72 places, 59 transitions, 409 flow. Second operand 16 states and 380 transitions. [2024-02-07 14:32:16,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 328 transitions, 2699 flow [2024-02-07 14:32:16,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 328 transitions, 2608 flow, removed 32 selfloop flow, removed 1 redundant places. [2024-02-07 14:32:16,155 INFO L231 Difference]: Finished difference. Result has 96 places, 145 transitions, 1512 flow [2024-02-07 14:32:16,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1512, PETRI_PLACES=96, PETRI_TRANSITIONS=145} [2024-02-07 14:32:16,155 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-02-07 14:32:16,155 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 145 transitions, 1512 flow [2024-02-07 14:32:16,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.0) internal successors, (208), 16 states have internal predecessors, (208), 0 states have call successors, (0), 0 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 14:32:16,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:32:16,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:32:16,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-02-07 14:32:16,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:32:16,357 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 14:32:16,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:32:16,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1929822266, now seen corresponding path program 2 times [2024-02-07 14:32:16,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:32:16,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162985818] [2024-02-07 14:32:16,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:32:16,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:32:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:32:16,739 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 14:32:16,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:32:16,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162985818] [2024-02-07 14:32:16,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162985818] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:32:16,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927196055] [2024-02-07 14:32:16,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:32:16,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:32:16,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:32:16,742 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 14:32:16,777 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 14:32:17,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:32:17,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:32:17,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-07 14:32:17,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:32:22,919 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 14:32:22,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:32:23,486 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 14:32:23,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927196055] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:32:23,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:32:23,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-02-07 14:32:23,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318295757] [2024-02-07 14:32:23,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:32:23,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 14:32:23,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:32:23,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 14:32:23,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:32:23,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 14:32:23,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 145 transitions, 1512 flow. Second operand has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:32:23,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:32:23,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 14:32:23,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:32:27,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:32:30,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.67s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:32:33,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.78s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:32:37,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:32:43,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.34s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:32:45,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-07 14:32:45,601 INFO L124 PetriNetUnfolderBase]: 5717/7900 cut-off events. [2024-02-07 14:32:45,601 INFO L125 PetriNetUnfolderBase]: For 47958/47958 co-relation queries the response was YES. [2024-02-07 14:32:45,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45247 conditions, 7900 events. 5717/7900 cut-off events. For 47958/47958 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 38720 event pairs, 555 based on Foata normal form. 5/7893 useless extension candidates. Maximal degree in co-relation 44679. Up to 4118 conditions per place. [2024-02-07 14:32:45,662 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 267 selfloop transitions, 104 changer transitions 10/386 dead transitions. [2024-02-07 14:32:45,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 386 transitions, 4107 flow [2024-02-07 14:32:45,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 14:32:45,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 14:32:45,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 291 transitions. [2024-02-07 14:32:45,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.714987714987715 [2024-02-07 14:32:45,664 INFO L175 Difference]: Start difference. First operand has 96 places, 145 transitions, 1512 flow. Second operand 11 states and 291 transitions. [2024-02-07 14:32:45,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 386 transitions, 4107 flow [2024-02-07 14:32:45,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 386 transitions, 3892 flow, removed 105 selfloop flow, removed 1 redundant places. [2024-02-07 14:32:45,771 INFO L231 Difference]: Finished difference. Result has 113 places, 228 transitions, 2684 flow [2024-02-07 14:32:45,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2684, PETRI_PLACES=113, PETRI_TRANSITIONS=228} [2024-02-07 14:32:45,773 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2024-02-07 14:32:45,773 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 228 transitions, 2684 flow [2024-02-07 14:32:45,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:32:45,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:32:45,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:32:45,787 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 14:32:45,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-02-07 14:32:45,987 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 14:32:45,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:32:45,988 INFO L85 PathProgramCache]: Analyzing trace with hash 473612786, now seen corresponding path program 1 times [2024-02-07 14:32:45,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:32:45,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772480786] [2024-02-07 14:32:45,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:32:45,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:32:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:32:46,340 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 14:32:46,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:32:46,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772480786] [2024-02-07 14:32:46,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772480786] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:32:46,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784467184] [2024-02-07 14:32:46,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:32:46,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:32:46,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:32:46,342 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 14:32:46,356 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 14:32:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:32:46,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-07 14:32:46,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:52,376 WARN L293 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 34 DAG size of output: 31 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-07 14:33:56,674 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 14:33:56,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:34:03,759 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 14:34:03,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784467184] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:34:03,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:34:03,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-02-07 14:34:03,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042020427] [2024-02-07 14:34:03,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:34:03,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 14:34:03,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:03,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 14:34:03,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=168, Unknown=2, NotChecked=0, Total=240 [2024-02-07 14:34:07,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:34:07,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-02-07 14:34:07,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 228 transitions, 2684 flow. Second operand has 16 states, 16 states have (on average 12.875) internal successors, (206), 16 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:34:07,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:07,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-02-07 14:34:07,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:23,620 WARN L293 SmtUtils]: Spent 8.55s on a formula simplification. DAG size of input: 51 DAG size of output: 34 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-07 14:34:36,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:34:41,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-07 14:34:52,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:35:04,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:35:08,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-07 14:35:13,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:35:14,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:35:15,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:35:17,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:35:19,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:35:23,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-07 14:35:25,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:35:29,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:35:33,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:35:37,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:35:39,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:35:44,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-07 14:35:45,630 INFO L124 PetriNetUnfolderBase]: 7641/10608 cut-off events. [2024-02-07 14:35:45,631 INFO L125 PetriNetUnfolderBase]: For 76665/76665 co-relation queries the response was YES. [2024-02-07 14:35:45,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65330 conditions, 10608 events. 7641/10608 cut-off events. For 76665/76665 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 55357 event pairs, 737 based on Foata normal form. 35/10631 useless extension candidates. Maximal degree in co-relation 64616. Up to 8223 conditions per place. [2024-02-07 14:35:45,720 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 417 selfloop transitions, 104 changer transitions 23/549 dead transitions. [2024-02-07 14:35:45,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 549 transitions, 5907 flow [2024-02-07 14:35:45,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-07 14:35:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-07 14:35:45,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 429 transitions. [2024-02-07 14:35:45,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6820349761526232 [2024-02-07 14:35:45,722 INFO L175 Difference]: Start difference. First operand has 113 places, 228 transitions, 2684 flow. Second operand 17 states and 429 transitions. [2024-02-07 14:35:45,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 549 transitions, 5907 flow [2024-02-07 14:35:45,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 549 transitions, 5768 flow, removed 67 selfloop flow, removed 1 redundant places. [2024-02-07 14:35:45,950 INFO L231 Difference]: Finished difference. Result has 139 places, 329 transitions, 4080 flow [2024-02-07 14:35:45,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2545, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4080, PETRI_PLACES=139, PETRI_TRANSITIONS=329} [2024-02-07 14:35:45,951 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2024-02-07 14:35:45,952 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 329 transitions, 4080 flow [2024-02-07 14:35:45,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.875) internal successors, (206), 16 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:45,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:45,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:35:45,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-02-07 14:35:46,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:35:46,169 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 14:35:46,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:46,170 INFO L85 PathProgramCache]: Analyzing trace with hash -765313234, now seen corresponding path program 2 times [2024-02-07 14:35:46,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:46,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327613501] [2024-02-07 14:35:46,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:46,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:46,604 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 14:35:46,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:46,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327613501] [2024-02-07 14:35:46,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327613501] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:35:46,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117185461] [2024-02-07 14:35:46,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:35:46,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:35:46,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:35:46,606 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 14:35:46,622 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 14:35:46,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:35:46,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:35:46,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-07 14:35:46,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:37:12,486 WARN L293 SmtUtils]: Spent 12.15s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-07 14:38:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:43,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:39:32,385 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 14:39:32,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117185461] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:39:32,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:39:32,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-02-07 14:39:32,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473489203] [2024-02-07 14:39:32,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:39:32,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 14:39:32,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:39:32,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 14:39:32,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=155, Unknown=26, NotChecked=0, Total=240 [2024-02-07 14:39:36,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:39:36,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-02-07 14:39:36,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 329 transitions, 4080 flow. Second operand has 16 states, 16 states have (on average 12.875) internal successors, (206), 16 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:39:36,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:39:36,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-02-07 14:39:36,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:39:44,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:39:48,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:39:52,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:40:14,960 WARN L293 SmtUtils]: Spent 8.14s on a formula simplification. DAG size of input: 43 DAG size of output: 37 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-07 14:40:24,501 INFO L124 PetriNetUnfolderBase]: 9913/13844 cut-off events. [2024-02-07 14:40:24,501 INFO L125 PetriNetUnfolderBase]: For 128270/128270 co-relation queries the response was YES. [2024-02-07 14:40:24,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91818 conditions, 13844 events. 9913/13844 cut-off events. For 128270/128270 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 76760 event pairs, 879 based on Foata normal form. 38/13870 useless extension candidates. Maximal degree in co-relation 90996. Up to 10349 conditions per place. [2024-02-07 14:40:24,664 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 463 selfloop transitions, 147 changer transitions 11/626 dead transitions. [2024-02-07 14:40:24,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 626 transitions, 7918 flow [2024-02-07 14:40:24,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-07 14:40:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-07 14:40:24,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 356 transitions. [2024-02-07 14:40:24,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6872586872586872 [2024-02-07 14:40:24,667 INFO L175 Difference]: Start difference. First operand has 139 places, 329 transitions, 4080 flow. Second operand 14 states and 356 transitions. [2024-02-07 14:40:24,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 626 transitions, 7918 flow [2024-02-07 14:40:25,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 626 transitions, 7307 flow, removed 303 selfloop flow, removed 1 redundant places. [2024-02-07 14:40:25,067 INFO L231 Difference]: Finished difference. Result has 161 places, 439 transitions, 5676 flow [2024-02-07 14:40:25,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3577, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5676, PETRI_PLACES=161, PETRI_TRANSITIONS=439} [2024-02-07 14:40:25,069 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-02-07 14:40:25,069 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 439 transitions, 5676 flow [2024-02-07 14:40:25,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.875) internal successors, (206), 16 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:25,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:25,070 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:25,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-07 14:40:25,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:25,285 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 14:40:25,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:25,285 INFO L85 PathProgramCache]: Analyzing trace with hash -104189947, now seen corresponding path program 3 times [2024-02-07 14:40:25,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:25,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814425058] [2024-02-07 14:40:25,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:25,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:25,491 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 14:40:25,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:25,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814425058] [2024-02-07 14:40:25,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814425058] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:40:25,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460550561] [2024-02-07 14:40:25,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:40:25,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:25,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:40:25,493 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 14:40:25,494 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 14:40:26,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 14:40:26,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:40:26,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-07 14:40:26,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:40:40,350 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 14:40:40,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:40:43,342 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 14:40:43,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460550561] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:40:43,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:40:43,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 17 [2024-02-07 14:40:43,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823906250] [2024-02-07 14:40:43,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:40:43,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-07 14:40:43,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:43,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-07 14:40:43,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-02-07 14:40:44,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-07 14:40:44,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 439 transitions, 5676 flow. Second operand has 17 states, 17 states have (on average 14.058823529411764) internal successors, (239), 17 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 14:40:44,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:44,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-07 14:40:44,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:49,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.29s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:40:56,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:41:00,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:41:02,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:41:09,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:41:13,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:41:16,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:41:21,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:41:34,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:41:37,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:41:39,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:41:40,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-07 14:41:42,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-07 14:41:46,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:41:50,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:41:52,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:42:05,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:42:09,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:42:11,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:42:21,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:42:24,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.10s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:42:30,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:42:31,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:42:33,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:42:41,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-07 14:42:54,685 INFO L124 PetriNetUnfolderBase]: 15695/22033 cut-off events. [2024-02-07 14:42:54,685 INFO L125 PetriNetUnfolderBase]: For 293456/293456 co-relation queries the response was YES. [2024-02-07 14:42:54,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156179 conditions, 22033 events. 15695/22033 cut-off events. For 293456/293456 co-relation queries the response was YES. Maximal size of possible extension queue 1017. Compared 130377 event pairs, 809 based on Foata normal form. 545/22566 useless extension candidates. Maximal degree in co-relation 155421. Up to 7047 conditions per place. [2024-02-07 14:42:54,985 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 729 selfloop transitions, 428 changer transitions 15/1177 dead transitions. [2024-02-07 14:42:54,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 1177 transitions, 15743 flow [2024-02-07 14:42:54,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-02-07 14:42:54,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-02-07 14:42:54,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 778 transitions. [2024-02-07 14:42:54,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6570945945945946 [2024-02-07 14:42:54,988 INFO L175 Difference]: Start difference. First operand has 161 places, 439 transitions, 5676 flow. Second operand 32 states and 778 transitions. [2024-02-07 14:42:54,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 1177 transitions, 15743 flow [2024-02-07 14:42:56,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 1177 transitions, 15216 flow, removed 259 selfloop flow, removed 4 redundant places. [2024-02-07 14:42:56,203 INFO L231 Difference]: Finished difference. Result has 208 places, 710 transitions, 11276 flow [2024-02-07 14:42:56,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=5076, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=11276, PETRI_PLACES=208, PETRI_TRANSITIONS=710} [2024-02-07 14:42:56,204 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2024-02-07 14:42:56,204 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 710 transitions, 11276 flow [2024-02-07 14:42:56,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.058823529411764) internal successors, (239), 17 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 14:42:56,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:42:56,204 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:42:56,216 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 14:42:56,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-07 14:42:56,416 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-02-07 14:42:56,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:42:56,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1924142251, now seen corresponding path program 3 times [2024-02-07 14:42:56,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:42:56,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378528312] [2024-02-07 14:42:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:42:56,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:42:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:42:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:56,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:42:56,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378528312] [2024-02-07 14:42:56,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378528312] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:42:56,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060219297] [2024-02-07 14:42:56,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:42:56,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:42:56,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:42:56,512 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 14:42:56,513 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 14:42:56,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-07 14:42:56,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:42:56,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-07 14:42:56,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... Killed by 15