./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/chl-array-int-symm.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 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/chl-array-int-symm.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/chl-array-int-symm.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-?-80b1b13-m [2024-01-31 16:46:19,819 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:46:19,888 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:46:19,893 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:46:19,893 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:46:19,920 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:46:19,921 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:46:19,921 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:46:19,922 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:46:19,925 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:46:19,925 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:46:19,925 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:46:19,925 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:46:19,926 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:46:19,927 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:46:19,927 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:46:19,927 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:46:19,927 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:46:19,927 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:46:19,928 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:46:19,928 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:46:19,928 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:46:19,928 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:46:19,929 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:46:19,929 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:46:19,929 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:46:19,929 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:46:19,929 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:46:19,930 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:46:19,930 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:46:19,931 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:46:19,931 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:46:19,931 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:46:19,931 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:46:19,931 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:46:19,932 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:46:19,932 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:46:19,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:46:19,932 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:46:19,932 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:46:19,932 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:46:19,933 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:46:19,933 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:46:19,933 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:46:20,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:46:20,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:46:20,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:46:20,147 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:46:20,147 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:46:20,148 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/chl-array-int-symm.wvr.yml/witness.yml [2024-01-31 16:46:20,269 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:46:20,270 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:46:20,270 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2024-01-31 16:46:21,216 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:46:21,361 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:46:21,361 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2024-01-31 16:46:21,368 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0681c948/e818cd3e15ab49999fede5b073926236/FLAG5f99d518b [2024-01-31 16:46:21,378 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0681c948/e818cd3e15ab49999fede5b073926236 [2024-01-31 16:46:21,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:46:21,381 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:46:21,383 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:46:21,383 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:46:21,387 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:46:21,387 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:46:20" (1/2) ... [2024-01-31 16:46:21,388 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5893a317 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:46:21, skipping insertion in model container [2024-01-31 16:46:21,389 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:46:20" (1/2) ... [2024-01-31 16:46:21,390 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@18749073 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:46:21, skipping insertion in model container [2024-01-31 16:46:21,391 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:46:21" (2/2) ... [2024-01-31 16:46:21,391 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5893a317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:21, skipping insertion in model container [2024-01-31 16:46:21,391 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:46:21" (2/2) ... [2024-01-31 16:46:21,392 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:46:21,435 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:46:21,436 INFO L98 nessWitnessExtractor]: Location invariant after [L62-L62] (unsigned long )_argptr == 0UL [2024-01-31 16:46:21,437 INFO L98 nessWitnessExtractor]: Location invariant after [L48-L48] (unsigned long )_argptr == 0UL [2024-01-31 16:46:21,455 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:46:21,613 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/chl-array-int-symm.wvr.c[2508,2521] [2024-01-31 16:46:21,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:46:21,631 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:46:21,640 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 16:46:21,642 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 16:46:21,646 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/chl-array-int-symm.wvr.c[2508,2521] [2024-01-31 16:46:21,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:46:21,659 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:46:21,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:21 WrapperNode [2024-01-31 16:46:21,666 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:46:21,668 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:46:21,668 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:46:21,668 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:46:21,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:21" (1/1) ... [2024-01-31 16:46:21,687 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:21" (1/1) ... [2024-01-31 16:46:21,706 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 205 [2024-01-31 16:46:21,707 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:46:21,707 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:46:21,707 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:46:21,707 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:46:21,715 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:21" (1/1) ... [2024-01-31 16:46:21,716 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:21" (1/1) ... [2024-01-31 16:46:21,718 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:21" (1/1) ... [2024-01-31 16:46:21,736 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 2, 10, 2]. 63 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 2, 1]. [2024-01-31 16:46:21,736 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:21" (1/1) ... [2024-01-31 16:46:21,736 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:21" (1/1) ... [2024-01-31 16:46:21,742 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:21" (1/1) ... [2024-01-31 16:46:21,744 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:21" (1/1) ... [2024-01-31 16:46:21,745 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:21" (1/1) ... [2024-01-31 16:46:21,746 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:21" (1/1) ... [2024-01-31 16:46:21,749 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:46:21,749 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:46:21,749 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:46:21,749 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:46:21,750 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:21" (1/1) ... [2024-01-31 16:46:21,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:46:21,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:21,772 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) [2024-01-31 16:46:21,774 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 [2024-01-31 16:46:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:46:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:46:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:46:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:46:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:46:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 16:46:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:46:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:46:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:46:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 16:46:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 16:46:21,798 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 16:46:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 16:46:21,798 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 16:46:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:46:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:46:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:46:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 16:46:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 16:46:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:46:21,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:46:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:46:21,800 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:46:21,879 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:46:21,880 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:46:22,125 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:46:22,126 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:46:22,324 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:46:22,324 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-31 16:46:22,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:46:22 BoogieIcfgContainer [2024-01-31 16:46:22,327 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:46:22,329 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:46:22,329 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:46:22,332 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:46:22,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:46:20" (1/4) ... [2024-01-31 16:46:22,332 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196bd346 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:46:22, skipping insertion in model container [2024-01-31 16:46:22,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:46:21" (2/4) ... [2024-01-31 16:46:22,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196bd346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:46:22, skipping insertion in model container [2024-01-31 16:46:22,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:21" (3/4) ... [2024-01-31 16:46:22,334 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196bd346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:46:22, skipping insertion in model container [2024-01-31 16:46:22,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:46:22" (4/4) ... [2024-01-31 16:46:22,335 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2024-01-31 16:46:22,349 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:46:22,350 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 16:46:22,350 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:46:22,385 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 16:46:22,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 29 transitions, 72 flow [2024-01-31 16:46:22,438 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2024-01-31 16:46:22,438 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:46:22,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 6/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-01-31 16:46:22,442 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 29 transitions, 72 flow [2024-01-31 16:46:22,445 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 26 transitions, 64 flow [2024-01-31 16:46:22,457 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:46:22,464 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;@3af54132, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:46:22,464 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 16:46:22,476 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:46:22,476 INFO L124 PetriNetUnfolderBase]: 6/25 cut-off events. [2024-01-31 16:46:22,476 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:46:22,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:22,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:22,477 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:22,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:22,481 INFO L85 PathProgramCache]: Analyzing trace with hash 300070933, now seen corresponding path program 1 times [2024-01-31 16:46:22,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:22,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199721689] [2024-01-31 16:46:22,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:22,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:23,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:23,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199721689] [2024-01-31 16:46:23,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199721689] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:23,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:23,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:46:23,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528930276] [2024-01-31 16:46:23,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:23,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:46:23,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:23,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:46:23,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:46:23,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:23,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 64 flow. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 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) [2024-01-31 16:46:23,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:23,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:23,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:23,432 INFO L124 PetriNetUnfolderBase]: 307/521 cut-off events. [2024-01-31 16:46:23,432 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-01-31 16:46:23,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 521 events. 307/521 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1926 event pairs, 104 based on Foata normal form. 1/402 useless extension candidates. Maximal degree in co-relation 536. Up to 189 conditions per place. [2024-01-31 16:46:23,439 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 68 selfloop transitions, 10 changer transitions 1/80 dead transitions. [2024-01-31 16:46:23,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 80 transitions, 360 flow [2024-01-31 16:46:23,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:46:23,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:46:23,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-01-31 16:46:23,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2024-01-31 16:46:23,452 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 64 flow. Second operand 8 states and 104 transitions. [2024-01-31 16:46:23,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 80 transitions, 360 flow [2024-01-31 16:46:23,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 80 transitions, 332 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 16:46:23,459 INFO L231 Difference]: Finished difference. Result has 34 places, 35 transitions, 125 flow [2024-01-31 16:46:23,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=125, PETRI_PLACES=34, PETRI_TRANSITIONS=35} [2024-01-31 16:46:23,499 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 7 predicate places. [2024-01-31 16:46:23,499 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 35 transitions, 125 flow [2024-01-31 16:46:23,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 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) [2024-01-31 16:46:23,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:23,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:23,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:46:23,501 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:23,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:23,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1289235428, now seen corresponding path program 1 times [2024-01-31 16:46:23,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:23,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140524625] [2024-01-31 16:46:23,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:23,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:23,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:23,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:23,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140524625] [2024-01-31 16:46:23,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140524625] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:23,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095200433] [2024-01-31 16:46:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:23,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:23,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:23,705 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) [2024-01-31 16:46:23,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 16:46:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:23,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 16:46:23,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:23,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:23,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:24,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095200433] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:24,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:46:24,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2024-01-31 16:46:24,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944798544] [2024-01-31 16:46:24,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:24,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:46:24,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:24,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:46:24,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:46:24,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:24,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 35 transitions, 125 flow. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 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) [2024-01-31 16:46:24,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:24,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:24,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:24,352 INFO L124 PetriNetUnfolderBase]: 659/1101 cut-off events. [2024-01-31 16:46:24,352 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2024-01-31 16:46:24,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2538 conditions, 1101 events. 659/1101 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4935 event pairs, 300 based on Foata normal form. 1/968 useless extension candidates. Maximal degree in co-relation 1481. Up to 515 conditions per place. [2024-01-31 16:46:24,383 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 97 selfloop transitions, 12 changer transitions 1/111 dead transitions. [2024-01-31 16:46:24,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 111 transitions, 560 flow [2024-01-31 16:46:24,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:46:24,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:46:24,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-01-31 16:46:24,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5344827586206896 [2024-01-31 16:46:24,387 INFO L175 Difference]: Start difference. First operand has 34 places, 35 transitions, 125 flow. Second operand 8 states and 124 transitions. [2024-01-31 16:46:24,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 111 transitions, 560 flow [2024-01-31 16:46:24,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 111 transitions, 556 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-01-31 16:46:24,392 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 212 flow [2024-01-31 16:46:24,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=212, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-01-31 16:46:24,393 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 18 predicate places. [2024-01-31 16:46:24,394 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 212 flow [2024-01-31 16:46:24,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 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) [2024-01-31 16:46:24,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:24,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:24,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:24,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:24,595 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:24,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:24,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1393704728, now seen corresponding path program 2 times [2024-01-31 16:46:24,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:24,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160995280] [2024-01-31 16:46:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:24,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:24,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:24,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160995280] [2024-01-31 16:46:24,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160995280] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:24,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96623168] [2024-01-31 16:46:24,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:46:24,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:24,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:24,756 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) [2024-01-31 16:46:24,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 16:46:24,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-31 16:46:24,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:24,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 16:46:24,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:46:24,878 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:46:24,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96623168] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:24,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:46:24,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2024-01-31 16:46:24,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272722437] [2024-01-31 16:46:24,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:24,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:46:24,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:24,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:46:24,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:46:24,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:24,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:24,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:24,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:24,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:25,053 INFO L124 PetriNetUnfolderBase]: 965/1624 cut-off events. [2024-01-31 16:46:25,053 INFO L125 PetriNetUnfolderBase]: For 905/905 co-relation queries the response was YES. [2024-01-31 16:46:25,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4082 conditions, 1624 events. 965/1624 cut-off events. For 905/905 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 8149 event pairs, 72 based on Foata normal form. 3/1429 useless extension candidates. Maximal degree in co-relation 2815. Up to 662 conditions per place. [2024-01-31 16:46:25,061 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 58 selfloop transitions, 19 changer transitions 1/79 dead transitions. [2024-01-31 16:46:25,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 79 transitions, 498 flow [2024-01-31 16:46:25,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:46:25,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:46:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2024-01-31 16:46:25,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496551724137931 [2024-01-31 16:46:25,065 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 212 flow. Second operand 5 states and 72 transitions. [2024-01-31 16:46:25,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 79 transitions, 498 flow [2024-01-31 16:46:25,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 79 transitions, 481 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-01-31 16:46:25,072 INFO L231 Difference]: Finished difference. Result has 49 places, 52 transitions, 323 flow [2024-01-31 16:46:25,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=323, PETRI_PLACES=49, PETRI_TRANSITIONS=52} [2024-01-31 16:46:25,073 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 22 predicate places. [2024-01-31 16:46:25,074 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 52 transitions, 323 flow [2024-01-31 16:46:25,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:25,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:25,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:25,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-01-31 16:46:25,285 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,SelfDestructingSolverStorable2 [2024-01-31 16:46:25,285 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:25,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:25,286 INFO L85 PathProgramCache]: Analyzing trace with hash 586734494, now seen corresponding path program 1 times [2024-01-31 16:46:25,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:25,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298618340] [2024-01-31 16:46:25,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:25,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:25,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:25,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298618340] [2024-01-31 16:46:25,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298618340] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:25,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:25,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:46:25,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480524891] [2024-01-31 16:46:25,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:25,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:46:25,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:25,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:46:25,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:46:25,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:25,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 52 transitions, 323 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2024-01-31 16:46:25,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:25,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:25,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:25,534 INFO L124 PetriNetUnfolderBase]: 737/1292 cut-off events. [2024-01-31 16:46:25,534 INFO L125 PetriNetUnfolderBase]: For 1783/1783 co-relation queries the response was YES. [2024-01-31 16:46:25,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3571 conditions, 1292 events. 737/1292 cut-off events. For 1783/1783 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6446 event pairs, 382 based on Foata normal form. 0/1160 useless extension candidates. Maximal degree in co-relation 2407. Up to 819 conditions per place. [2024-01-31 16:46:25,540 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 73 selfloop transitions, 6 changer transitions 0/80 dead transitions. [2024-01-31 16:46:25,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 80 transitions, 598 flow [2024-01-31 16:46:25,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:46:25,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:46:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2024-01-31 16:46:25,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896551724137931 [2024-01-31 16:46:25,542 INFO L175 Difference]: Start difference. First operand has 49 places, 52 transitions, 323 flow. Second operand 5 states and 71 transitions. [2024-01-31 16:46:25,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 80 transitions, 598 flow [2024-01-31 16:46:25,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 80 transitions, 574 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-01-31 16:46:25,547 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 323 flow [2024-01-31 16:46:25,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=323, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-01-31 16:46:25,548 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 26 predicate places. [2024-01-31 16:46:25,548 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 323 flow [2024-01-31 16:46:25,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2024-01-31 16:46:25,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:25,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:25,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:46:25,549 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:25,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:25,549 INFO L85 PathProgramCache]: Analyzing trace with hash 972782424, now seen corresponding path program 1 times [2024-01-31 16:46:25,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:25,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556728047] [2024-01-31 16:46:25,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:25,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:25,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:25,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556728047] [2024-01-31 16:46:25,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556728047] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:25,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:25,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:46:25,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269033983] [2024-01-31 16:46:25,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:25,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:46:25,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:25,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:46:25,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:46:25,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:25,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 323 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2024-01-31 16:46:25,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:25,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:25,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:25,735 INFO L124 PetriNetUnfolderBase]: 615/1107 cut-off events. [2024-01-31 16:46:25,736 INFO L125 PetriNetUnfolderBase]: For 1522/1522 co-relation queries the response was YES. [2024-01-31 16:46:25,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3040 conditions, 1107 events. 615/1107 cut-off events. For 1522/1522 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5454 event pairs, 354 based on Foata normal form. 0/1057 useless extension candidates. Maximal degree in co-relation 2270. Up to 819 conditions per place. [2024-01-31 16:46:25,740 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 58 selfloop transitions, 4 changer transitions 7/70 dead transitions. [2024-01-31 16:46:25,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 70 transitions, 518 flow [2024-01-31 16:46:25,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:46:25,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:46:25,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-01-31 16:46:25,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2024-01-31 16:46:25,741 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 323 flow. Second operand 5 states and 65 transitions. [2024-01-31 16:46:25,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 70 transitions, 518 flow [2024-01-31 16:46:25,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 503 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-01-31 16:46:25,745 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 281 flow [2024-01-31 16:46:25,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=281, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2024-01-31 16:46:25,746 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 29 predicate places. [2024-01-31 16:46:25,746 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 281 flow [2024-01-31 16:46:25,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2024-01-31 16:46:25,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:25,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:25,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:46:25,747 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:25,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:25,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1303544900, now seen corresponding path program 1 times [2024-01-31 16:46:25,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:25,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634119809] [2024-01-31 16:46:25,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:25,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:25,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:25,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634119809] [2024-01-31 16:46:25,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634119809] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:25,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117398421] [2024-01-31 16:46:25,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:25,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:25,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:25,855 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) [2024-01-31 16:46:25,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 16:46:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:25,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 16:46:25,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:26,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:26,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117398421] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:26,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:46:26,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2024-01-31 16:46:26,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127950516] [2024-01-31 16:46:26,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:26,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:46:26,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:26,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:46:26,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:46:26,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:26,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 281 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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) [2024-01-31 16:46:26,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:26,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:26,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:26,278 INFO L124 PetriNetUnfolderBase]: 523/907 cut-off events. [2024-01-31 16:46:26,278 INFO L125 PetriNetUnfolderBase]: For 1166/1166 co-relation queries the response was YES. [2024-01-31 16:46:26,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2550 conditions, 907 events. 523/907 cut-off events. For 1166/1166 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4065 event pairs, 312 based on Foata normal form. 1/906 useless extension candidates. Maximal degree in co-relation 2502. Up to 819 conditions per place. [2024-01-31 16:46:26,283 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 39 selfloop transitions, 2 changer transitions 25/67 dead transitions. [2024-01-31 16:46:26,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 469 flow [2024-01-31 16:46:26,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:46:26,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:46:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 73 transitions. [2024-01-31 16:46:26,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35960591133004927 [2024-01-31 16:46:26,284 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 281 flow. Second operand 7 states and 73 transitions. [2024-01-31 16:46:26,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 469 flow [2024-01-31 16:46:26,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 453 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-01-31 16:46:26,288 INFO L231 Difference]: Finished difference. Result has 58 places, 42 transitions, 237 flow [2024-01-31 16:46:26,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=237, PETRI_PLACES=58, PETRI_TRANSITIONS=42} [2024-01-31 16:46:26,290 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 31 predicate places. [2024-01-31 16:46:26,290 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 42 transitions, 237 flow [2024-01-31 16:46:26,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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) [2024-01-31 16:46:26,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:26,291 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] [2024-01-31 16:46:26,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:26,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:26,500 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:26,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:26,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2082851895, now seen corresponding path program 1 times [2024-01-31 16:46:26,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:26,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121474600] [2024-01-31 16:46:26,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:26,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:46:26,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:26,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121474600] [2024-01-31 16:46:26,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121474600] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:26,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:26,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:46:26,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480130820] [2024-01-31 16:46:26,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:26,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:46:26,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:26,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:46:26,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:46:26,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:26,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 42 transitions, 237 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2024-01-31 16:46:26,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:26,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:26,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:26,681 INFO L124 PetriNetUnfolderBase]: 357/625 cut-off events. [2024-01-31 16:46:26,681 INFO L125 PetriNetUnfolderBase]: For 762/762 co-relation queries the response was YES. [2024-01-31 16:46:26,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1739 conditions, 625 events. 357/625 cut-off events. For 762/762 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2543 event pairs, 174 based on Foata normal form. 28/652 useless extension candidates. Maximal degree in co-relation 1712. Up to 366 conditions per place. [2024-01-31 16:46:26,687 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 54 selfloop transitions, 6 changer transitions 2/63 dead transitions. [2024-01-31 16:46:26,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 63 transitions, 418 flow [2024-01-31 16:46:26,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:46:26,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:46:26,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 69 transitions. [2024-01-31 16:46:26,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47586206896551725 [2024-01-31 16:46:26,688 INFO L175 Difference]: Start difference. First operand has 58 places, 42 transitions, 237 flow. Second operand 5 states and 69 transitions. [2024-01-31 16:46:26,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 63 transitions, 418 flow [2024-01-31 16:46:26,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 63 transitions, 367 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-01-31 16:46:26,692 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 217 flow [2024-01-31 16:46:26,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2024-01-31 16:46:26,692 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 18 predicate places. [2024-01-31 16:46:26,693 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 217 flow [2024-01-31 16:46:26,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2024-01-31 16:46:26,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:26,693 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] [2024-01-31 16:46:26,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:46:26,693 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:26,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:26,694 INFO L85 PathProgramCache]: Analyzing trace with hash 611165169, now seen corresponding path program 1 times [2024-01-31 16:46:26,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:26,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325119044] [2024-01-31 16:46:26,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:26,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:46:26,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:26,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325119044] [2024-01-31 16:46:26,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325119044] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:26,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:26,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:46:26,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840637368] [2024-01-31 16:46:26,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:26,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:46:26,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:26,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:46:26,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:46:26,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:26,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2024-01-31 16:46:26,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:26,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:26,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:26,837 INFO L124 PetriNetUnfolderBase]: 286/507 cut-off events. [2024-01-31 16:46:26,838 INFO L125 PetriNetUnfolderBase]: For 444/444 co-relation queries the response was YES. [2024-01-31 16:46:26,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1333 conditions, 507 events. 286/507 cut-off events. For 444/444 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1981 event pairs, 157 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 1306. Up to 366 conditions per place. [2024-01-31 16:46:26,840 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 30 selfloop transitions, 2 changer transitions 21/54 dead transitions. [2024-01-31 16:46:26,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 54 transitions, 327 flow [2024-01-31 16:46:26,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:46:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:46:26,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-01-31 16:46:26,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42758620689655175 [2024-01-31 16:46:26,841 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 217 flow. Second operand 5 states and 62 transitions. [2024-01-31 16:46:26,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 54 transitions, 327 flow [2024-01-31 16:46:26,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 54 transitions, 320 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-01-31 16:46:26,843 INFO L231 Difference]: Finished difference. Result has 48 places, 33 transitions, 138 flow [2024-01-31 16:46:26,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=48, PETRI_TRANSITIONS=33} [2024-01-31 16:46:26,843 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 21 predicate places. [2024-01-31 16:46:26,843 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 33 transitions, 138 flow [2024-01-31 16:46:26,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2024-01-31 16:46:26,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:26,844 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] [2024-01-31 16:46:26,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 16:46:26,844 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:26,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:26,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1085755427, now seen corresponding path program 1 times [2024-01-31 16:46:26,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:26,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753578460] [2024-01-31 16:46:26,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:26,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:26,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:26,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753578460] [2024-01-31 16:46:26,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753578460] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:26,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249882368] [2024-01-31 16:46:26,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:26,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:26,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:26,953 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) [2024-01-31 16:46:26,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 16:46:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:27,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:46:27,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:27,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:27,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249882368] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:27,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:46:27,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-01-31 16:46:27,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668626580] [2024-01-31 16:46:27,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:27,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:46:27,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:27,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:46:27,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:46:27,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:27,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 33 transitions, 138 flow. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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) [2024-01-31 16:46:27,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:27,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:27,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:27,239 INFO L124 PetriNetUnfolderBase]: 257/425 cut-off events. [2024-01-31 16:46:27,239 INFO L125 PetriNetUnfolderBase]: For 308/308 co-relation queries the response was YES. [2024-01-31 16:46:27,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1148 conditions, 425 events. 257/425 cut-off events. For 308/308 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1400 event pairs, 89 based on Foata normal form. 22/446 useless extension candidates. Maximal degree in co-relation 1120. Up to 219 conditions per place. [2024-01-31 16:46:27,241 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 38 selfloop transitions, 8 changer transitions 0/47 dead transitions. [2024-01-31 16:46:27,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 284 flow [2024-01-31 16:46:27,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:46:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:46:27,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 62 transitions. [2024-01-31 16:46:27,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3054187192118227 [2024-01-31 16:46:27,243 INFO L175 Difference]: Start difference. First operand has 48 places, 33 transitions, 138 flow. Second operand 7 states and 62 transitions. [2024-01-31 16:46:27,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 284 flow [2024-01-31 16:46:27,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 254 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-01-31 16:46:27,244 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 149 flow [2024-01-31 16:46:27,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=149, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2024-01-31 16:46:27,245 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2024-01-31 16:46:27,245 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 149 flow [2024-01-31 16:46:27,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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) [2024-01-31 16:46:27,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:27,246 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] [2024-01-31 16:46:27,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:27,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:27,458 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:27,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:27,458 INFO L85 PathProgramCache]: Analyzing trace with hash -491614192, now seen corresponding path program 1 times [2024-01-31 16:46:27,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:27,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367051366] [2024-01-31 16:46:27,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:27,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:27,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:27,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367051366] [2024-01-31 16:46:27,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367051366] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:27,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671451364] [2024-01-31 16:46:27,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:27,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:27,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:27,557 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) [2024-01-31 16:46:27,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 16:46:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:27,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:46:27,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:27,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:27,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671451364] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:27,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:46:27,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-01-31 16:46:27,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383098266] [2024-01-31 16:46:27,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:27,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:46:27,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:27,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:46:27,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:46:27,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:27,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 149 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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) [2024-01-31 16:46:27,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:27,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:27,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:27,843 INFO L124 PetriNetUnfolderBase]: 350/604 cut-off events. [2024-01-31 16:46:27,844 INFO L125 PetriNetUnfolderBase]: For 446/446 co-relation queries the response was YES. [2024-01-31 16:46:27,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1667 conditions, 604 events. 350/604 cut-off events. For 446/446 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2316 event pairs, 176 based on Foata normal form. 0/575 useless extension candidates. Maximal degree in co-relation 1639. Up to 302 conditions per place. [2024-01-31 16:46:27,846 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 41 selfloop transitions, 9 changer transitions 0/51 dead transitions. [2024-01-31 16:46:27,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 51 transitions, 315 flow [2024-01-31 16:46:27,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:46:27,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:46:27,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 64 transitions. [2024-01-31 16:46:27,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31527093596059114 [2024-01-31 16:46:27,847 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 149 flow. Second operand 7 states and 64 transitions. [2024-01-31 16:46:27,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 51 transitions, 315 flow [2024-01-31 16:46:27,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 300 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-01-31 16:46:27,848 INFO L231 Difference]: Finished difference. Result has 46 places, 35 transitions, 172 flow [2024-01-31 16:46:27,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=172, PETRI_PLACES=46, PETRI_TRANSITIONS=35} [2024-01-31 16:46:27,849 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 19 predicate places. [2024-01-31 16:46:27,849 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 35 transitions, 172 flow [2024-01-31 16:46:27,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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) [2024-01-31 16:46:27,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:27,849 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] [2024-01-31 16:46:27,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:28,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-01-31 16:46:28,061 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:28,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:28,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1613368291, now seen corresponding path program 1 times [2024-01-31 16:46:28,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:28,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479026085] [2024-01-31 16:46:28,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:28,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:46:28,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:28,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479026085] [2024-01-31 16:46:28,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479026085] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:28,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621576942] [2024-01-31 16:46:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:28,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:28,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:28,518 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) [2024-01-31 16:46:28,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 16:46:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:28,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:46:28,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:28,693 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:46:28,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-01-31 16:46:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:28,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:46:28,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621576942] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:28,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:46:28,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2024-01-31 16:46:28,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021741574] [2024-01-31 16:46:28,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:28,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:46:28,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:28,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:46:28,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:46:28,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:28,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 35 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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) [2024-01-31 16:46:28,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:28,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:28,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:28,926 INFO L124 PetriNetUnfolderBase]: 495/860 cut-off events. [2024-01-31 16:46:28,926 INFO L125 PetriNetUnfolderBase]: For 916/916 co-relation queries the response was YES. [2024-01-31 16:46:28,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2590 conditions, 860 events. 495/860 cut-off events. For 916/916 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3793 event pairs, 211 based on Foata normal form. 1/860 useless extension candidates. Maximal degree in co-relation 2560. Up to 540 conditions per place. [2024-01-31 16:46:28,929 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 71 selfloop transitions, 9 changer transitions 7/88 dead transitions. [2024-01-31 16:46:28,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 88 transitions, 553 flow [2024-01-31 16:46:28,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:46:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:46:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-01-31 16:46:28,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46798029556650245 [2024-01-31 16:46:28,930 INFO L175 Difference]: Start difference. First operand has 46 places, 35 transitions, 172 flow. Second operand 7 states and 95 transitions. [2024-01-31 16:46:28,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 88 transitions, 553 flow [2024-01-31 16:46:28,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 88 transitions, 540 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-01-31 16:46:28,933 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 234 flow [2024-01-31 16:46:28,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=234, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2024-01-31 16:46:28,933 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 24 predicate places. [2024-01-31 16:46:28,933 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 234 flow [2024-01-31 16:46:28,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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) [2024-01-31 16:46:28,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:28,933 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] [2024-01-31 16:46:28,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:29,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:29,146 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:29,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:29,146 INFO L85 PathProgramCache]: Analyzing trace with hash 416489795, now seen corresponding path program 2 times [2024-01-31 16:46:29,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:29,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793621648] [2024-01-31 16:46:29,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:29,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:29,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:29,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793621648] [2024-01-31 16:46:29,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793621648] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:29,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:29,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:46:29,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081857438] [2024-01-31 16:46:29,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:29,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:46:29,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:29,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:46:29,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-01-31 16:46:29,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:29,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 234 flow. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:29,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:29,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:29,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:29,646 INFO L124 PetriNetUnfolderBase]: 537/941 cut-off events. [2024-01-31 16:46:29,646 INFO L125 PetriNetUnfolderBase]: For 1791/1791 co-relation queries the response was YES. [2024-01-31 16:46:29,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3162 conditions, 941 events. 537/941 cut-off events. For 1791/1791 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4248 event pairs, 160 based on Foata normal form. 1/941 useless extension candidates. Maximal degree in co-relation 3131. Up to 534 conditions per place. [2024-01-31 16:46:29,650 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 63 selfloop transitions, 14 changer transitions 7/85 dead transitions. [2024-01-31 16:46:29,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 85 transitions, 594 flow [2024-01-31 16:46:29,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:46:29,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:46:29,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-01-31 16:46:29,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38697318007662834 [2024-01-31 16:46:29,651 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 234 flow. Second operand 9 states and 101 transitions. [2024-01-31 16:46:29,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 85 transitions, 594 flow [2024-01-31 16:46:29,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 85 transitions, 565 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-01-31 16:46:29,655 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 309 flow [2024-01-31 16:46:29,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=309, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2024-01-31 16:46:29,656 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 32 predicate places. [2024-01-31 16:46:29,656 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 309 flow [2024-01-31 16:46:29,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:29,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:29,657 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] [2024-01-31 16:46:29,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-31 16:46:29,657 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:29,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:29,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2105662081, now seen corresponding path program 3 times [2024-01-31 16:46:29,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:29,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365988472] [2024-01-31 16:46:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:29,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:30,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:30,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365988472] [2024-01-31 16:46:30,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365988472] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:30,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077214697] [2024-01-31 16:46:30,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:46:30,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:30,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:30,226 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) [2024-01-31 16:46:30,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 16:46:30,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-31 16:46:30,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:30,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:46:30,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:30,424 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:46:30,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-01-31 16:46:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:30,444 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:46:30,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077214697] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:30,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:46:30,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2024-01-31 16:46:30,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519156462] [2024-01-31 16:46:30,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:30,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:46:30,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:30,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:46:30,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:46:30,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:30,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 309 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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) [2024-01-31 16:46:30,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:30,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:30,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:30,667 INFO L124 PetriNetUnfolderBase]: 567/991 cut-off events. [2024-01-31 16:46:30,667 INFO L125 PetriNetUnfolderBase]: For 2423/2423 co-relation queries the response was YES. [2024-01-31 16:46:30,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3544 conditions, 991 events. 567/991 cut-off events. For 2423/2423 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4585 event pairs, 257 based on Foata normal form. 1/992 useless extension candidates. Maximal degree in co-relation 3510. Up to 554 conditions per place. [2024-01-31 16:46:30,671 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 71 selfloop transitions, 15 changer transitions 7/94 dead transitions. [2024-01-31 16:46:30,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 94 transitions, 754 flow [2024-01-31 16:46:30,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:46:30,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:46:30,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2024-01-31 16:46:30,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458128078817734 [2024-01-31 16:46:30,672 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 309 flow. Second operand 7 states and 93 transitions. [2024-01-31 16:46:30,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 94 transitions, 754 flow [2024-01-31 16:46:30,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 94 transitions, 732 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-01-31 16:46:30,675 INFO L231 Difference]: Finished difference. Result has 64 places, 51 transitions, 421 flow [2024-01-31 16:46:30,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=421, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2024-01-31 16:46:30,676 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 37 predicate places. [2024-01-31 16:46:30,676 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 421 flow [2024-01-31 16:46:30,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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) [2024-01-31 16:46:30,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:30,676 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] [2024-01-31 16:46:30,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:30,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:30,890 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:30,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:30,891 INFO L85 PathProgramCache]: Analyzing trace with hash 520959095, now seen corresponding path program 4 times [2024-01-31 16:46:30,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:30,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966504751] [2024-01-31 16:46:30,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:30,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:31,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:31,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966504751] [2024-01-31 16:46:31,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966504751] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:31,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:31,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:46:31,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764536556] [2024-01-31 16:46:31,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:31,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:46:31,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:31,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:46:31,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:46:31,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:31,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 51 transitions, 421 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:31,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:31,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:31,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:31,446 INFO L124 PetriNetUnfolderBase]: 579/1015 cut-off events. [2024-01-31 16:46:31,446 INFO L125 PetriNetUnfolderBase]: For 3143/3143 co-relation queries the response was YES. [2024-01-31 16:46:31,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3871 conditions, 1015 events. 579/1015 cut-off events. For 3143/3143 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4708 event pairs, 253 based on Foata normal form. 1/1015 useless extension candidates. Maximal degree in co-relation 3836. Up to 547 conditions per place. [2024-01-31 16:46:31,451 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 66 selfloop transitions, 23 changer transitions 7/97 dead transitions. [2024-01-31 16:46:31,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 97 transitions, 830 flow [2024-01-31 16:46:31,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:46:31,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:46:31,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-01-31 16:46:31,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946360153256705 [2024-01-31 16:46:31,452 INFO L175 Difference]: Start difference. First operand has 64 places, 51 transitions, 421 flow. Second operand 9 states and 103 transitions. [2024-01-31 16:46:31,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 97 transitions, 830 flow [2024-01-31 16:46:31,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 97 transitions, 779 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-01-31 16:46:31,457 INFO L231 Difference]: Finished difference. Result has 71 places, 56 transitions, 515 flow [2024-01-31 16:46:31,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=515, PETRI_PLACES=71, PETRI_TRANSITIONS=56} [2024-01-31 16:46:31,457 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 44 predicate places. [2024-01-31 16:46:31,458 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 56 transitions, 515 flow [2024-01-31 16:46:31,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:31,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:31,458 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] [2024-01-31 16:46:31,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-31 16:46:31,458 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:31,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:31,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1608219477, now seen corresponding path program 5 times [2024-01-31 16:46:31,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:31,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954553707] [2024-01-31 16:46:31,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:31,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:31,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:31,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954553707] [2024-01-31 16:46:31,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954553707] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:31,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521133] [2024-01-31 16:46:31,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:46:31,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:31,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:31,869 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) [2024-01-31 16:46:31,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 16:46:31,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:46:31,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:31,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:46:31,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:32,048 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:46:32,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-01-31 16:46:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:32,079 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:46:32,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521133] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:32,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:46:32,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2024-01-31 16:46:32,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078575161] [2024-01-31 16:46:32,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:32,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:46:32,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:32,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:46:32,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:46:32,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:32,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 56 transitions, 515 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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) [2024-01-31 16:46:32,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:32,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:32,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:32,288 INFO L124 PetriNetUnfolderBase]: 567/988 cut-off events. [2024-01-31 16:46:32,288 INFO L125 PetriNetUnfolderBase]: For 3277/3277 co-relation queries the response was YES. [2024-01-31 16:46:32,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3881 conditions, 988 events. 567/988 cut-off events. For 3277/3277 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4514 event pairs, 247 based on Foata normal form. 1/989 useless extension candidates. Maximal degree in co-relation 3842. Up to 554 conditions per place. [2024-01-31 16:46:32,293 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 66 selfloop transitions, 21 changer transitions 7/95 dead transitions. [2024-01-31 16:46:32,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 95 transitions, 877 flow [2024-01-31 16:46:32,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:46:32,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:46:32,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-01-31 16:46:32,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46798029556650245 [2024-01-31 16:46:32,294 INFO L175 Difference]: Start difference. First operand has 71 places, 56 transitions, 515 flow. Second operand 7 states and 95 transitions. [2024-01-31 16:46:32,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 95 transitions, 877 flow [2024-01-31 16:46:32,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 95 transitions, 832 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-01-31 16:46:32,301 INFO L231 Difference]: Finished difference. Result has 74 places, 58 transitions, 560 flow [2024-01-31 16:46:32,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=560, PETRI_PLACES=74, PETRI_TRANSITIONS=58} [2024-01-31 16:46:32,301 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 47 predicate places. [2024-01-31 16:46:32,302 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 58 transitions, 560 flow [2024-01-31 16:46:32,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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) [2024-01-31 16:46:32,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:32,302 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] [2024-01-31 16:46:32,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:32,512 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 [2024-01-31 16:46:32,512 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:32,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:32,513 INFO L85 PathProgramCache]: Analyzing trace with hash -247236895, now seen corresponding path program 6 times [2024-01-31 16:46:32,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:32,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260363652] [2024-01-31 16:46:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:32,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:32,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:32,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260363652] [2024-01-31 16:46:32,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260363652] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:32,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927310414] [2024-01-31 16:46:32,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:46:32,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:32,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:32,919 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) [2024-01-31 16:46:32,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 16:46:33,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-01-31 16:46:33,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:33,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:46:33,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:33,076 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:46:33,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-01-31 16:46:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:33,103 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:46:33,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927310414] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:33,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:46:33,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2024-01-31 16:46:33,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685630074] [2024-01-31 16:46:33,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:33,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:46:33,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:33,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:46:33,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:46:33,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:33,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 58 transitions, 560 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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) [2024-01-31 16:46:33,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:33,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:33,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:33,334 INFO L124 PetriNetUnfolderBase]: 712/1240 cut-off events. [2024-01-31 16:46:33,335 INFO L125 PetriNetUnfolderBase]: For 4217/4217 co-relation queries the response was YES. [2024-01-31 16:46:33,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4862 conditions, 1240 events. 712/1240 cut-off events. For 4217/4217 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5887 event pairs, 306 based on Foata normal form. 1/1240 useless extension candidates. Maximal degree in co-relation 4822. Up to 747 conditions per place. [2024-01-31 16:46:33,343 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 73 selfloop transitions, 24 changer transitions 7/105 dead transitions. [2024-01-31 16:46:33,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 105 transitions, 1022 flow [2024-01-31 16:46:33,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:46:33,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:46:33,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-01-31 16:46:33,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433497536945813 [2024-01-31 16:46:33,345 INFO L175 Difference]: Start difference. First operand has 74 places, 58 transitions, 560 flow. Second operand 7 states and 90 transitions. [2024-01-31 16:46:33,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 105 transitions, 1022 flow [2024-01-31 16:46:33,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 105 transitions, 971 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-01-31 16:46:33,352 INFO L231 Difference]: Finished difference. Result has 81 places, 69 transitions, 723 flow [2024-01-31 16:46:33,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=723, PETRI_PLACES=81, PETRI_TRANSITIONS=69} [2024-01-31 16:46:33,352 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 54 predicate places. [2024-01-31 16:46:33,352 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 69 transitions, 723 flow [2024-01-31 16:46:33,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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) [2024-01-31 16:46:33,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:33,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:33,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:33,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-31 16:46:33,563 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:33,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:33,564 INFO L85 PathProgramCache]: Analyzing trace with hash -2070357573, now seen corresponding path program 7 times [2024-01-31 16:46:33,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:33,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164493009] [2024-01-31 16:46:33,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:33,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:33,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:33,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164493009] [2024-01-31 16:46:33,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164493009] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:33,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961888241] [2024-01-31 16:46:33,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:46:33,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:33,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:33,956 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:46:33,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-31 16:46:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:34,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:46:34,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:34,121 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:46:34,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-01-31 16:46:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:34,149 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:46:34,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961888241] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:34,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:46:34,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2024-01-31 16:46:34,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677746218] [2024-01-31 16:46:34,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:34,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:46:34,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:34,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:46:34,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:46:34,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:34,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 69 transitions, 723 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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) [2024-01-31 16:46:34,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:34,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:34,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:34,379 INFO L124 PetriNetUnfolderBase]: 726/1277 cut-off events. [2024-01-31 16:46:34,380 INFO L125 PetriNetUnfolderBase]: For 5078/5078 co-relation queries the response was YES. [2024-01-31 16:46:34,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5261 conditions, 1277 events. 726/1277 cut-off events. For 5078/5078 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6215 event pairs, 300 based on Foata normal form. 1/1277 useless extension candidates. Maximal degree in co-relation 5217. Up to 747 conditions per place. [2024-01-31 16:46:34,386 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 78 selfloop transitions, 25 changer transitions 7/111 dead transitions. [2024-01-31 16:46:34,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 111 transitions, 1131 flow [2024-01-31 16:46:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:46:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:46:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2024-01-31 16:46:34,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630541871921182 [2024-01-31 16:46:34,387 INFO L175 Difference]: Start difference. First operand has 81 places, 69 transitions, 723 flow. Second operand 7 states and 94 transitions. [2024-01-31 16:46:34,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 111 transitions, 1131 flow [2024-01-31 16:46:34,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 111 transitions, 1109 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-01-31 16:46:34,396 INFO L231 Difference]: Finished difference. Result has 89 places, 73 transitions, 827 flow [2024-01-31 16:46:34,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=827, PETRI_PLACES=89, PETRI_TRANSITIONS=73} [2024-01-31 16:46:34,397 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 62 predicate places. [2024-01-31 16:46:34,397 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 73 transitions, 827 flow [2024-01-31 16:46:34,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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) [2024-01-31 16:46:34,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:34,397 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] [2024-01-31 16:46:34,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:34,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-31 16:46:34,608 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:34,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:34,608 INFO L85 PathProgramCache]: Analyzing trace with hash 279270783, now seen corresponding path program 8 times [2024-01-31 16:46:34,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:34,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653277681] [2024-01-31 16:46:34,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:34,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:34,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:34,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653277681] [2024-01-31 16:46:34,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653277681] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:34,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727647642] [2024-01-31 16:46:34,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:46:34,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:34,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:34,968 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:46:34,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-31 16:46:35,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-31 16:46:35,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:35,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:46:35,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:35,135 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:46:35,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-01-31 16:46:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:35,153 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:46:35,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727647642] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:35,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:46:35,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2024-01-31 16:46:35,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639584407] [2024-01-31 16:46:35,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:35,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:46:35,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:35,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:46:35,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:46:35,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:35,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 73 transitions, 827 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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) [2024-01-31 16:46:35,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:35,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:35,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:35,373 INFO L124 PetriNetUnfolderBase]: 716/1252 cut-off events. [2024-01-31 16:46:35,374 INFO L125 PetriNetUnfolderBase]: For 6040/6040 co-relation queries the response was YES. [2024-01-31 16:46:35,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5422 conditions, 1252 events. 716/1252 cut-off events. For 6040/6040 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5985 event pairs, 300 based on Foata normal form. 1/1252 useless extension candidates. Maximal degree in co-relation 5374. Up to 747 conditions per place. [2024-01-31 16:46:35,380 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 74 selfloop transitions, 26 changer transitions 7/108 dead transitions. [2024-01-31 16:46:35,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 108 transitions, 1184 flow [2024-01-31 16:46:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:46:35,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:46:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2024-01-31 16:46:35,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2024-01-31 16:46:35,381 INFO L175 Difference]: Start difference. First operand has 89 places, 73 transitions, 827 flow. Second operand 7 states and 91 transitions. [2024-01-31 16:46:35,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 108 transitions, 1184 flow [2024-01-31 16:46:35,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 108 transitions, 1134 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-01-31 16:46:35,391 INFO L231 Difference]: Finished difference. Result has 92 places, 73 transitions, 840 flow [2024-01-31 16:46:35,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=840, PETRI_PLACES=92, PETRI_TRANSITIONS=73} [2024-01-31 16:46:35,391 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 65 predicate places. [2024-01-31 16:46:35,391 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 73 transitions, 840 flow [2024-01-31 16:46:35,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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) [2024-01-31 16:46:35,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:35,392 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] [2024-01-31 16:46:35,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:35,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-31 16:46:35,603 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:35,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:35,603 INFO L85 PathProgramCache]: Analyzing trace with hash 194884095, now seen corresponding path program 9 times [2024-01-31 16:46:35,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:35,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540931900] [2024-01-31 16:46:35,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:35,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:35,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:35,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:35,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540931900] [2024-01-31 16:46:35,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540931900] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:35,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:35,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:46:35,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35193466] [2024-01-31 16:46:35,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:35,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:46:35,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:35,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:46:35,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-01-31 16:46:35,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:35,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 73 transitions, 840 flow. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:35,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:35,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:35,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:36,129 INFO L124 PetriNetUnfolderBase]: 704/1225 cut-off events. [2024-01-31 16:46:36,129 INFO L125 PetriNetUnfolderBase]: For 5820/5820 co-relation queries the response was YES. [2024-01-31 16:46:36,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5357 conditions, 1225 events. 704/1225 cut-off events. For 5820/5820 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5806 event pairs, 188 based on Foata normal form. 1/1225 useless extension candidates. Maximal degree in co-relation 5309. Up to 735 conditions per place. [2024-01-31 16:46:36,134 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 73 selfloop transitions, 28 changer transitions 7/109 dead transitions. [2024-01-31 16:46:36,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 109 transitions, 1225 flow [2024-01-31 16:46:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:46:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:46:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 97 transitions. [2024-01-31 16:46:36,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33448275862068966 [2024-01-31 16:46:36,135 INFO L175 Difference]: Start difference. First operand has 92 places, 73 transitions, 840 flow. Second operand 10 states and 97 transitions. [2024-01-31 16:46:36,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 109 transitions, 1225 flow [2024-01-31 16:46:36,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 109 transitions, 1165 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-01-31 16:46:36,144 INFO L231 Difference]: Finished difference. Result has 98 places, 75 transitions, 894 flow [2024-01-31 16:46:36,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=894, PETRI_PLACES=98, PETRI_TRANSITIONS=75} [2024-01-31 16:46:36,144 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 71 predicate places. [2024-01-31 16:46:36,144 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 75 transitions, 894 flow [2024-01-31 16:46:36,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:36,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:36,145 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] [2024-01-31 16:46:36,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-01-31 16:46:36,145 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:36,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:36,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1474481612, now seen corresponding path program 1 times [2024-01-31 16:46:36,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:36,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660433783] [2024-01-31 16:46:36,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:36,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:36,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:36,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660433783] [2024-01-31 16:46:36,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660433783] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:36,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678771118] [2024-01-31 16:46:36,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:36,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:36,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:36,349 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:46:36,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-31 16:46:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:36,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:46:36,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:36,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:36,553 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:46:36,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:46:36,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:36,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678771118] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:46:36,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:46:36,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-01-31 16:46:36,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840419483] [2024-01-31 16:46:36,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:46:36,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:46:36,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:36,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:46:36,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:46:36,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:36,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 75 transitions, 894 flow. Second operand has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 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) [2024-01-31 16:46:36,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:36,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:36,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:36,988 INFO L124 PetriNetUnfolderBase]: 738/1278 cut-off events. [2024-01-31 16:46:36,988 INFO L125 PetriNetUnfolderBase]: For 6738/6738 co-relation queries the response was YES. [2024-01-31 16:46:36,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5784 conditions, 1278 events. 738/1278 cut-off events. For 6738/6738 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6345 event pairs, 84 based on Foata normal form. 16/1294 useless extension candidates. Maximal degree in co-relation 5732. Up to 687 conditions per place. [2024-01-31 16:46:36,994 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 100 selfloop transitions, 29 changer transitions 0/130 dead transitions. [2024-01-31 16:46:36,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 130 transitions, 1457 flow [2024-01-31 16:46:36,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:46:36,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:46:36,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-01-31 16:46:36,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-01-31 16:46:36,995 INFO L175 Difference]: Start difference. First operand has 98 places, 75 transitions, 894 flow. Second operand 10 states and 110 transitions. [2024-01-31 16:46:36,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 130 transitions, 1457 flow [2024-01-31 16:46:37,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 130 transitions, 1441 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-01-31 16:46:37,006 INFO L231 Difference]: Finished difference. Result has 102 places, 77 transitions, 967 flow [2024-01-31 16:46:37,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=967, PETRI_PLACES=102, PETRI_TRANSITIONS=77} [2024-01-31 16:46:37,006 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 75 predicate places. [2024-01-31 16:46:37,006 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 77 transitions, 967 flow [2024-01-31 16:46:37,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 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) [2024-01-31 16:46:37,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:37,007 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] [2024-01-31 16:46:37,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:37,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:37,218 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:37,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:37,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1651584578, now seen corresponding path program 1 times [2024-01-31 16:46:37,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:37,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209068927] [2024-01-31 16:46:37,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:37,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:37,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:37,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209068927] [2024-01-31 16:46:37,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209068927] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:37,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:37,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:46:37,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596191392] [2024-01-31 16:46:37,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:37,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:46:37,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:37,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:46:37,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:46:37,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:37,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 77 transitions, 967 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:37,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:37,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:37,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:37,666 INFO L124 PetriNetUnfolderBase]: 804/1406 cut-off events. [2024-01-31 16:46:37,666 INFO L125 PetriNetUnfolderBase]: For 8533/8533 co-relation queries the response was YES. [2024-01-31 16:46:37,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6628 conditions, 1406 events. 804/1406 cut-off events. For 8533/8533 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7010 event pairs, 352 based on Foata normal form. 12/1418 useless extension candidates. Maximal degree in co-relation 6576. Up to 816 conditions per place. [2024-01-31 16:46:37,674 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 92 selfloop transitions, 35 changer transitions 0/128 dead transitions. [2024-01-31 16:46:37,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 128 transitions, 1543 flow [2024-01-31 16:46:37,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:46:37,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:46:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-01-31 16:46:37,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41762452107279696 [2024-01-31 16:46:37,675 INFO L175 Difference]: Start difference. First operand has 102 places, 77 transitions, 967 flow. Second operand 9 states and 109 transitions. [2024-01-31 16:46:37,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 128 transitions, 1543 flow [2024-01-31 16:46:37,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 128 transitions, 1453 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-01-31 16:46:37,687 INFO L231 Difference]: Finished difference. Result has 106 places, 83 transitions, 1062 flow [2024-01-31 16:46:37,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1062, PETRI_PLACES=106, PETRI_TRANSITIONS=83} [2024-01-31 16:46:37,688 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 79 predicate places. [2024-01-31 16:46:37,688 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 83 transitions, 1062 flow [2024-01-31 16:46:37,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:37,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:37,688 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] [2024-01-31 16:46:37,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-01-31 16:46:37,688 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:37,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:37,689 INFO L85 PathProgramCache]: Analyzing trace with hash 611673264, now seen corresponding path program 2 times [2024-01-31 16:46:37,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:37,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684081384] [2024-01-31 16:46:37,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:37,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:37,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:37,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684081384] [2024-01-31 16:46:37,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684081384] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:37,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:37,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:46:37,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643591460] [2024-01-31 16:46:37,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:37,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:46:37,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:37,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:46:37,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:46:37,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:37,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 83 transitions, 1062 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:37,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:37,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:37,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:38,148 INFO L124 PetriNetUnfolderBase]: 798/1400 cut-off events. [2024-01-31 16:46:38,148 INFO L125 PetriNetUnfolderBase]: For 8339/8339 co-relation queries the response was YES. [2024-01-31 16:46:38,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6611 conditions, 1400 events. 798/1400 cut-off events. For 8339/8339 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7087 event pairs, 320 based on Foata normal form. 6/1406 useless extension candidates. Maximal degree in co-relation 6558. Up to 816 conditions per place. [2024-01-31 16:46:38,155 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 84 selfloop transitions, 30 changer transitions 12/127 dead transitions. [2024-01-31 16:46:38,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 127 transitions, 1536 flow [2024-01-31 16:46:38,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:46:38,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:46:38,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-01-31 16:46:38,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3716475095785441 [2024-01-31 16:46:38,156 INFO L175 Difference]: Start difference. First operand has 106 places, 83 transitions, 1062 flow. Second operand 9 states and 97 transitions. [2024-01-31 16:46:38,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 127 transitions, 1536 flow [2024-01-31 16:46:38,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 127 transitions, 1476 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-01-31 16:46:38,170 INFO L231 Difference]: Finished difference. Result has 111 places, 81 transitions, 1021 flow [2024-01-31 16:46:38,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1021, PETRI_PLACES=111, PETRI_TRANSITIONS=81} [2024-01-31 16:46:38,171 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 84 predicate places. [2024-01-31 16:46:38,171 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 81 transitions, 1021 flow [2024-01-31 16:46:38,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:38,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:38,171 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] [2024-01-31 16:46:38,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-01-31 16:46:38,171 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:38,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:38,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1213396944, now seen corresponding path program 3 times [2024-01-31 16:46:38,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:38,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147025428] [2024-01-31 16:46:38,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:38,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:38,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:38,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147025428] [2024-01-31 16:46:38,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147025428] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:38,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952341880] [2024-01-31 16:46:38,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:46:38,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:38,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:38,379 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:46:38,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-31 16:46:38,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:46:38,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:38,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:46:38,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:38,542 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:46:38,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-01-31 16:46:38,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:38,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:38,634 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:46:38,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:46:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:38,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952341880] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:38,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:46:38,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 18 [2024-01-31 16:46:38,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172732591] [2024-01-31 16:46:38,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:38,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:46:38,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:38,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:46:38,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:46:38,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:38,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 81 transitions, 1021 flow. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:38,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:38,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:38,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:38,957 INFO L124 PetriNetUnfolderBase]: 840/1484 cut-off events. [2024-01-31 16:46:38,957 INFO L125 PetriNetUnfolderBase]: For 8314/8314 co-relation queries the response was YES. [2024-01-31 16:46:38,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6914 conditions, 1484 events. 840/1484 cut-off events. For 8314/8314 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7646 event pairs, 346 based on Foata normal form. 12/1496 useless extension candidates. Maximal degree in co-relation 6860. Up to 835 conditions per place. [2024-01-31 16:46:38,966 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 101 selfloop transitions, 31 changer transitions 0/133 dead transitions. [2024-01-31 16:46:38,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 133 transitions, 1596 flow [2024-01-31 16:46:38,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:46:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:46:38,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-01-31 16:46:38,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975369458128079 [2024-01-31 16:46:38,967 INFO L175 Difference]: Start difference. First operand has 111 places, 81 transitions, 1021 flow. Second operand 7 states and 101 transitions. [2024-01-31 16:46:38,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 133 transitions, 1596 flow [2024-01-31 16:46:38,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 133 transitions, 1520 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-01-31 16:46:38,984 INFO L231 Difference]: Finished difference. Result has 110 places, 85 transitions, 1094 flow [2024-01-31 16:46:38,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1094, PETRI_PLACES=110, PETRI_TRANSITIONS=85} [2024-01-31 16:46:38,985 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 83 predicate places. [2024-01-31 16:46:38,985 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 85 transitions, 1094 flow [2024-01-31 16:46:38,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:38,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:38,985 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] [2024-01-31 16:46:39,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:39,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-01-31 16:46:39,192 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:39,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:39,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1398394812, now seen corresponding path program 2 times [2024-01-31 16:46:39,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:39,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574747751] [2024-01-31 16:46:39,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:39,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:39,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:39,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574747751] [2024-01-31 16:46:39,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574747751] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:39,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672471230] [2024-01-31 16:46:39,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:46:39,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:39,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:39,380 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:46:39,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-31 16:46:39,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:46:39,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:39,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:46:39,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:39,550 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 16:46:39,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-01-31 16:46:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:39,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:39,624 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:46:39,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:46:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:39,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672471230] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:46:39,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:46:39,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-01-31 16:46:39,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593362879] [2024-01-31 16:46:39,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:46:39,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:46:39,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:39,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:46:39,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:46:39,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:39,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 85 transitions, 1094 flow. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:39,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:39,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:39,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:40,150 INFO L124 PetriNetUnfolderBase]: 1247/2199 cut-off events. [2024-01-31 16:46:40,150 INFO L125 PetriNetUnfolderBase]: For 10965/10965 co-relation queries the response was YES. [2024-01-31 16:46:40,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9756 conditions, 2199 events. 1247/2199 cut-off events. For 10965/10965 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12290 event pairs, 458 based on Foata normal form. 16/2214 useless extension candidates. Maximal degree in co-relation 9702. Up to 796 conditions per place. [2024-01-31 16:46:40,163 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 125 selfloop transitions, 42 changer transitions 0/168 dead transitions. [2024-01-31 16:46:40,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 168 transitions, 1924 flow [2024-01-31 16:46:40,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:46:40,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:46:40,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-01-31 16:46:40,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-01-31 16:46:40,165 INFO L175 Difference]: Start difference. First operand has 110 places, 85 transitions, 1094 flow. Second operand 12 states and 145 transitions. [2024-01-31 16:46:40,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 168 transitions, 1924 flow [2024-01-31 16:46:40,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 168 transitions, 1893 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-01-31 16:46:40,183 INFO L231 Difference]: Finished difference. Result has 123 places, 93 transitions, 1282 flow [2024-01-31 16:46:40,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1282, PETRI_PLACES=123, PETRI_TRANSITIONS=93} [2024-01-31 16:46:40,184 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 96 predicate places. [2024-01-31 16:46:40,184 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 93 transitions, 1282 flow [2024-01-31 16:46:40,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:40,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:40,185 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] [2024-01-31 16:46:40,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:40,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:40,396 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:40,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:40,396 INFO L85 PathProgramCache]: Analyzing trace with hash -623668694, now seen corresponding path program 4 times [2024-01-31 16:46:40,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:40,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696265929] [2024-01-31 16:46:40,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:40,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:40,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:40,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696265929] [2024-01-31 16:46:40,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696265929] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:40,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:40,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:46:40,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389117557] [2024-01-31 16:46:40,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:40,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:46:40,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:40,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:46:40,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:46:40,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:40,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 93 transitions, 1282 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:40,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:40,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:40,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:40,930 INFO L124 PetriNetUnfolderBase]: 1241/2193 cut-off events. [2024-01-31 16:46:40,930 INFO L125 PetriNetUnfolderBase]: For 13810/13810 co-relation queries the response was YES. [2024-01-31 16:46:40,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10349 conditions, 2193 events. 1241/2193 cut-off events. For 13810/13810 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12191 event pairs, 665 based on Foata normal form. 6/2199 useless extension candidates. Maximal degree in co-relation 10289. Up to 1536 conditions per place. [2024-01-31 16:46:40,944 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 86 selfloop transitions, 35 changer transitions 5/127 dead transitions. [2024-01-31 16:46:40,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 127 transitions, 1714 flow [2024-01-31 16:46:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:46:40,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:46:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 93 transitions. [2024-01-31 16:46:40,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563218390804598 [2024-01-31 16:46:40,946 INFO L175 Difference]: Start difference. First operand has 123 places, 93 transitions, 1282 flow. Second operand 9 states and 93 transitions. [2024-01-31 16:46:40,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 127 transitions, 1714 flow [2024-01-31 16:46:40,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 127 transitions, 1657 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-01-31 16:46:40,971 INFO L231 Difference]: Finished difference. Result has 124 places, 92 transitions, 1271 flow [2024-01-31 16:46:40,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1271, PETRI_PLACES=124, PETRI_TRANSITIONS=92} [2024-01-31 16:46:40,971 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 97 predicate places. [2024-01-31 16:46:40,972 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 92 transitions, 1271 flow [2024-01-31 16:46:40,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:40,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:40,972 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] [2024-01-31 16:46:40,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-01-31 16:46:40,973 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:40,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:40,973 INFO L85 PathProgramCache]: Analyzing trace with hash 955762952, now seen corresponding path program 5 times [2024-01-31 16:46:40,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:40,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143794799] [2024-01-31 16:46:40,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:40,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:41,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:41,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143794799] [2024-01-31 16:46:41,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143794799] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:41,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:41,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:46:41,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830406047] [2024-01-31 16:46:41,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:41,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:46:41,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:41,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:46:41,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:46:41,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:41,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 92 transitions, 1271 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:41,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:41,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:41,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:41,556 INFO L124 PetriNetUnfolderBase]: 1197/2101 cut-off events. [2024-01-31 16:46:41,556 INFO L125 PetriNetUnfolderBase]: For 12676/12676 co-relation queries the response was YES. [2024-01-31 16:46:41,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9915 conditions, 2101 events. 1197/2101 cut-off events. For 12676/12676 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11485 event pairs, 637 based on Foata normal form. 6/2107 useless extension candidates. Maximal degree in co-relation 9857. Up to 1536 conditions per place. [2024-01-31 16:46:41,568 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 85 selfloop transitions, 32 changer transitions 10/128 dead transitions. [2024-01-31 16:46:41,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 128 transitions, 1692 flow [2024-01-31 16:46:41,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:46:41,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:46:41,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-01-31 16:46:41,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36398467432950193 [2024-01-31 16:46:41,569 INFO L175 Difference]: Start difference. First operand has 124 places, 92 transitions, 1271 flow. Second operand 9 states and 95 transitions. [2024-01-31 16:46:41,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 128 transitions, 1692 flow [2024-01-31 16:46:41,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 128 transitions, 1611 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-01-31 16:46:41,592 INFO L231 Difference]: Finished difference. Result has 124 places, 89 transitions, 1200 flow [2024-01-31 16:46:41,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1200, PETRI_PLACES=124, PETRI_TRANSITIONS=89} [2024-01-31 16:46:41,593 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 97 predicate places. [2024-01-31 16:46:41,593 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 89 transitions, 1200 flow [2024-01-31 16:46:41,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:41,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:41,594 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] [2024-01-31 16:46:41,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-01-31 16:46:41,594 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:41,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:41,595 INFO L85 PathProgramCache]: Analyzing trace with hash -447580480, now seen corresponding path program 3 times [2024-01-31 16:46:41,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:41,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127486429] [2024-01-31 16:46:41,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:41,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:41,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:41,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127486429] [2024-01-31 16:46:41,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127486429] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:41,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11353714] [2024-01-31 16:46:41,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:46:41,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:41,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:41,828 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:46:41,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-31 16:46:41,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:46:41,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:41,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:46:41,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:41,994 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:46:41,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-01-31 16:46:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:42,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:42,076 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:46:42,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:46:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:42,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11353714] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:46:42,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:46:42,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-01-31 16:46:42,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489674168] [2024-01-31 16:46:42,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:46:42,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:46:42,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:42,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:46:42,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:46:42,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:42,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 89 transitions, 1200 flow. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 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) [2024-01-31 16:46:42,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:42,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:42,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:42,711 INFO L124 PetriNetUnfolderBase]: 1286/2275 cut-off events. [2024-01-31 16:46:42,711 INFO L125 PetriNetUnfolderBase]: For 12982/12982 co-relation queries the response was YES. [2024-01-31 16:46:42,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10371 conditions, 2275 events. 1286/2275 cut-off events. For 12982/12982 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12765 event pairs, 516 based on Foata normal form. 24/2299 useless extension candidates. Maximal degree in co-relation 10313. Up to 1116 conditions per place. [2024-01-31 16:46:42,725 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 128 selfloop transitions, 48 changer transitions 0/177 dead transitions. [2024-01-31 16:46:42,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 177 transitions, 2035 flow [2024-01-31 16:46:42,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 16:46:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 16:46:42,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 161 transitions. [2024-01-31 16:46:42,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3701149425287356 [2024-01-31 16:46:42,726 INFO L175 Difference]: Start difference. First operand has 124 places, 89 transitions, 1200 flow. Second operand 15 states and 161 transitions. [2024-01-31 16:46:42,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 177 transitions, 2035 flow [2024-01-31 16:46:42,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 177 transitions, 1927 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-01-31 16:46:42,750 INFO L231 Difference]: Finished difference. Result has 129 places, 99 transitions, 1332 flow [2024-01-31 16:46:42,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1332, PETRI_PLACES=129, PETRI_TRANSITIONS=99} [2024-01-31 16:46:42,750 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 102 predicate places. [2024-01-31 16:46:42,750 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 99 transitions, 1332 flow [2024-01-31 16:46:42,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 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) [2024-01-31 16:46:42,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:42,751 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] [2024-01-31 16:46:42,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:42,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-31 16:46:42,962 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:42,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:42,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1351866488, now seen corresponding path program 4 times [2024-01-31 16:46:42,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:42,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197211782] [2024-01-31 16:46:42,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:42,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:43,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:43,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197211782] [2024-01-31 16:46:43,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197211782] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:43,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:43,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:46:43,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267504050] [2024-01-31 16:46:43,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:43,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:46:43,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:43,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:46:43,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:46:43,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:43,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 99 transitions, 1332 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:43,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:43,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:43,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:43,469 INFO L124 PetriNetUnfolderBase]: 1240/2172 cut-off events. [2024-01-31 16:46:43,470 INFO L125 PetriNetUnfolderBase]: For 13547/13547 co-relation queries the response was YES. [2024-01-31 16:46:43,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10363 conditions, 2172 events. 1240/2172 cut-off events. For 13547/13547 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11889 event pairs, 678 based on Foata normal form. 4/2176 useless extension candidates. Maximal degree in co-relation 10301. Up to 1627 conditions per place. [2024-01-31 16:46:43,482 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 93 selfloop transitions, 32 changer transitions 3/129 dead transitions. [2024-01-31 16:46:43,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 129 transitions, 1741 flow [2024-01-31 16:46:43,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:46:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:46:43,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2024-01-31 16:46:43,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3371647509578544 [2024-01-31 16:46:43,483 INFO L175 Difference]: Start difference. First operand has 129 places, 99 transitions, 1332 flow. Second operand 9 states and 88 transitions. [2024-01-31 16:46:43,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 129 transitions, 1741 flow [2024-01-31 16:46:43,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 129 transitions, 1682 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-01-31 16:46:43,508 INFO L231 Difference]: Finished difference. Result has 130 places, 97 transitions, 1297 flow [2024-01-31 16:46:43,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1297, PETRI_PLACES=130, PETRI_TRANSITIONS=97} [2024-01-31 16:46:43,508 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 103 predicate places. [2024-01-31 16:46:43,508 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 97 transitions, 1297 flow [2024-01-31 16:46:43,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:43,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:43,509 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] [2024-01-31 16:46:43,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-01-31 16:46:43,509 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:43,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:43,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1732983634, now seen corresponding path program 6 times [2024-01-31 16:46:43,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:43,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102159794] [2024-01-31 16:46:43,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:43,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:43,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:43,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102159794] [2024-01-31 16:46:43,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102159794] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:43,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:43,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:46:43,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861792079] [2024-01-31 16:46:43,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:43,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:46:43,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:43,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:46:43,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:46:43,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:43,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 97 transitions, 1297 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:43,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:43,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:43,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:44,001 INFO L124 PetriNetUnfolderBase]: 1263/2205 cut-off events. [2024-01-31 16:46:44,002 INFO L125 PetriNetUnfolderBase]: For 15931/15931 co-relation queries the response was YES. [2024-01-31 16:46:44,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10711 conditions, 2205 events. 1263/2205 cut-off events. For 15931/15931 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12008 event pairs, 710 based on Foata normal form. 12/2217 useless extension candidates. Maximal degree in co-relation 10650. Up to 1641 conditions per place. [2024-01-31 16:46:44,013 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 97 selfloop transitions, 37 changer transitions 0/135 dead transitions. [2024-01-31 16:46:44,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 135 transitions, 1831 flow [2024-01-31 16:46:44,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:46:44,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:46:44,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-01-31 16:46:44,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3831417624521073 [2024-01-31 16:46:44,022 INFO L175 Difference]: Start difference. First operand has 130 places, 97 transitions, 1297 flow. Second operand 9 states and 100 transitions. [2024-01-31 16:46:44,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 135 transitions, 1831 flow [2024-01-31 16:46:44,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 135 transitions, 1757 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-01-31 16:46:44,045 INFO L231 Difference]: Finished difference. Result has 132 places, 103 transitions, 1439 flow [2024-01-31 16:46:44,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1439, PETRI_PLACES=132, PETRI_TRANSITIONS=103} [2024-01-31 16:46:44,047 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 105 predicate places. [2024-01-31 16:46:44,047 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 103 transitions, 1439 flow [2024-01-31 16:46:44,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:44,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:44,048 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] [2024-01-31 16:46:44,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-01-31 16:46:44,048 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:44,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:44,048 INFO L85 PathProgramCache]: Analyzing trace with hash -404286214, now seen corresponding path program 7 times [2024-01-31 16:46:44,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:44,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115935058] [2024-01-31 16:46:44,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:44,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:44,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:44,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115935058] [2024-01-31 16:46:44,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115935058] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:44,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:44,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:46:44,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548949897] [2024-01-31 16:46:44,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:44,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:46:44,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:44,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:46:44,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:46:44,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:44,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 103 transitions, 1439 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:44,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:44,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:44,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:44,567 INFO L124 PetriNetUnfolderBase]: 1251/2193 cut-off events. [2024-01-31 16:46:44,567 INFO L125 PetriNetUnfolderBase]: For 15092/15092 co-relation queries the response was YES. [2024-01-31 16:46:44,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10578 conditions, 2193 events. 1251/2193 cut-off events. For 15092/15092 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12001 event pairs, 700 based on Foata normal form. 12/2205 useless extension candidates. Maximal degree in co-relation 10514. Up to 1641 conditions per place. [2024-01-31 16:46:44,579 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 97 selfloop transitions, 37 changer transitions 0/135 dead transitions. [2024-01-31 16:46:44,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 135 transitions, 1889 flow [2024-01-31 16:46:44,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:46:44,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:46:44,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-01-31 16:46:44,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-01-31 16:46:44,580 INFO L175 Difference]: Start difference. First operand has 132 places, 103 transitions, 1439 flow. Second operand 9 states and 99 transitions. [2024-01-31 16:46:44,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 135 transitions, 1889 flow [2024-01-31 16:46:44,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 135 transitions, 1827 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-01-31 16:46:44,605 INFO L231 Difference]: Finished difference. Result has 138 places, 106 transitions, 1529 flow [2024-01-31 16:46:44,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1529, PETRI_PLACES=138, PETRI_TRANSITIONS=106} [2024-01-31 16:46:44,605 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 111 predicate places. [2024-01-31 16:46:44,605 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 106 transitions, 1529 flow [2024-01-31 16:46:44,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:44,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:44,606 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] [2024-01-31 16:46:44,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-01-31 16:46:44,606 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:44,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:44,606 INFO L85 PathProgramCache]: Analyzing trace with hash 130943588, now seen corresponding path program 8 times [2024-01-31 16:46:44,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:44,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274439831] [2024-01-31 16:46:44,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:44,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:44,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:44,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274439831] [2024-01-31 16:46:44,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274439831] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:44,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:44,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:46:44,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317991981] [2024-01-31 16:46:44,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:44,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:46:44,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:44,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:46:44,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:46:44,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:44,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 106 transitions, 1529 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:44,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:44,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:44,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:45,150 INFO L124 PetriNetUnfolderBase]: 1251/2199 cut-off events. [2024-01-31 16:46:45,150 INFO L125 PetriNetUnfolderBase]: For 15218/15218 co-relation queries the response was YES. [2024-01-31 16:46:45,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10675 conditions, 2199 events. 1251/2199 cut-off events. For 15218/15218 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12088 event pairs, 700 based on Foata normal form. 6/2205 useless extension candidates. Maximal degree in co-relation 10608. Up to 1641 conditions per place. [2024-01-31 16:46:45,162 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 91 selfloop transitions, 36 changer transitions 5/133 dead transitions. [2024-01-31 16:46:45,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 133 transitions, 1895 flow [2024-01-31 16:46:45,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:46:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:46:45,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-01-31 16:46:45,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367816091954023 [2024-01-31 16:46:45,163 INFO L175 Difference]: Start difference. First operand has 138 places, 106 transitions, 1529 flow. Second operand 9 states and 96 transitions. [2024-01-31 16:46:45,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 133 transitions, 1895 flow [2024-01-31 16:46:45,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 133 transitions, 1789 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-01-31 16:46:45,190 INFO L231 Difference]: Finished difference. Result has 139 places, 105 transitions, 1480 flow [2024-01-31 16:46:45,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1423, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1480, PETRI_PLACES=139, PETRI_TRANSITIONS=105} [2024-01-31 16:46:45,191 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 112 predicate places. [2024-01-31 16:46:45,191 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 105 transitions, 1480 flow [2024-01-31 16:46:45,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:45,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:45,191 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] [2024-01-31 16:46:45,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-01-31 16:46:45,191 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:45,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:45,192 INFO L85 PathProgramCache]: Analyzing trace with hash 337616722, now seen corresponding path program 5 times [2024-01-31 16:46:45,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:45,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439498148] [2024-01-31 16:46:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:45,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:45,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:45,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439498148] [2024-01-31 16:46:45,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439498148] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:45,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604074963] [2024-01-31 16:46:45,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:46:45,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:45,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:45,389 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:46:45,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-31 16:46:45,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:46:45,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:45,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:46:45,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:45,549 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 16:46:45,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-01-31 16:46:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:45,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:45,623 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-31 16:46:45,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-31 16:46:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:45,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604074963] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:46:45,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:46:45,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-01-31 16:46:45,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367040387] [2024-01-31 16:46:45,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:46:45,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:46:45,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:45,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:46:45,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:46:45,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:45,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 105 transitions, 1480 flow. Second operand has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 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) [2024-01-31 16:46:45,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:45,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:45,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:46,056 INFO L124 PetriNetUnfolderBase]: 1342/2377 cut-off events. [2024-01-31 16:46:46,056 INFO L125 PetriNetUnfolderBase]: For 16228/16228 co-relation queries the response was YES. [2024-01-31 16:46:46,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11441 conditions, 2377 events. 1342/2377 cut-off events. For 16228/16228 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13463 event pairs, 664 based on Foata normal form. 24/2401 useless extension candidates. Maximal degree in co-relation 11374. Up to 1571 conditions per place. [2024-01-31 16:46:46,067 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 113 selfloop transitions, 38 changer transitions 0/152 dead transitions. [2024-01-31 16:46:46,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 152 transitions, 2049 flow [2024-01-31 16:46:46,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:46:46,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:46:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-01-31 16:46:46,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3931034482758621 [2024-01-31 16:46:46,079 INFO L175 Difference]: Start difference. First operand has 139 places, 105 transitions, 1480 flow. Second operand 10 states and 114 transitions. [2024-01-31 16:46:46,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 152 transitions, 2049 flow [2024-01-31 16:46:46,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 152 transitions, 1975 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-01-31 16:46:46,103 INFO L231 Difference]: Finished difference. Result has 142 places, 108 transitions, 1546 flow [2024-01-31 16:46:46,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1546, PETRI_PLACES=142, PETRI_TRANSITIONS=108} [2024-01-31 16:46:46,103 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 115 predicate places. [2024-01-31 16:46:46,103 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 108 transitions, 1546 flow [2024-01-31 16:46:46,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 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) [2024-01-31 16:46:46,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:46,103 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] [2024-01-31 16:46:46,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:46,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:46,313 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:46,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:46,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1197753832, now seen corresponding path program 9 times [2024-01-31 16:46:46,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:46,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799944915] [2024-01-31 16:46:46,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:46,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:46,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:46,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799944915] [2024-01-31 16:46:46,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799944915] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:46,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:46,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:46:46,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854839461] [2024-01-31 16:46:46,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:46,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:46:46,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:46,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:46:46,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:46:46,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:46,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 108 transitions, 1546 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:46,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:46,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:46,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:46,867 INFO L124 PetriNetUnfolderBase]: 1336/2371 cut-off events. [2024-01-31 16:46:46,867 INFO L125 PetriNetUnfolderBase]: For 16967/16967 co-relation queries the response was YES. [2024-01-31 16:46:46,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11592 conditions, 2371 events. 1336/2371 cut-off events. For 16967/16967 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13432 event pairs, 751 based on Foata normal form. 6/2377 useless extension candidates. Maximal degree in co-relation 11522. Up to 1824 conditions per place. [2024-01-31 16:46:46,882 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 93 selfloop transitions, 37 changer transitions 5/136 dead transitions. [2024-01-31 16:46:46,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 136 transitions, 1903 flow [2024-01-31 16:46:46,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:46:46,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:46:46,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-01-31 16:46:46,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367816091954023 [2024-01-31 16:46:46,883 INFO L175 Difference]: Start difference. First operand has 142 places, 108 transitions, 1546 flow. Second operand 9 states and 96 transitions. [2024-01-31 16:46:46,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 136 transitions, 1903 flow [2024-01-31 16:46:46,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 136 transitions, 1836 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-01-31 16:46:46,954 INFO L231 Difference]: Finished difference. Result has 144 places, 106 transitions, 1512 flow [2024-01-31 16:46:46,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1457, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1512, PETRI_PLACES=144, PETRI_TRANSITIONS=106} [2024-01-31 16:46:46,955 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 117 predicate places. [2024-01-31 16:46:46,955 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 106 transitions, 1512 flow [2024-01-31 16:46:46,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:46,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:46,955 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] [2024-01-31 16:46:46,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-01-31 16:46:46,955 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:46,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:46,956 INFO L85 PathProgramCache]: Analyzing trace with hash 515557096, now seen corresponding path program 6 times [2024-01-31 16:46:46,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:46,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171318991] [2024-01-31 16:46:46,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:46,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:47,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:47,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171318991] [2024-01-31 16:46:47,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171318991] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:47,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:47,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:46:47,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718789634] [2024-01-31 16:46:47,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:47,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:46:47,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:47,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:46:47,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:46:47,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:47,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 106 transitions, 1512 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:47,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:47,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:47,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:47,449 INFO L124 PetriNetUnfolderBase]: 1334/2367 cut-off events. [2024-01-31 16:46:47,449 INFO L125 PetriNetUnfolderBase]: For 15971/15971 co-relation queries the response was YES. [2024-01-31 16:46:47,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11428 conditions, 2367 events. 1334/2367 cut-off events. For 15971/15971 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13375 event pairs, 771 based on Foata normal form. 4/2371 useless extension candidates. Maximal degree in co-relation 11359. Up to 1824 conditions per place. [2024-01-31 16:46:47,464 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 94 selfloop transitions, 35 changer transitions 4/134 dead transitions. [2024-01-31 16:46:47,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 134 transitions, 1896 flow [2024-01-31 16:46:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:46:47,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:46:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2024-01-31 16:46:47,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3524904214559387 [2024-01-31 16:46:47,466 INFO L175 Difference]: Start difference. First operand has 144 places, 106 transitions, 1512 flow. Second operand 9 states and 92 transitions. [2024-01-31 16:46:47,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 134 transitions, 1896 flow [2024-01-31 16:46:47,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 134 transitions, 1818 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-01-31 16:46:47,497 INFO L231 Difference]: Finished difference. Result has 145 places, 105 transitions, 1490 flow [2024-01-31 16:46:47,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1436, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1490, PETRI_PLACES=145, PETRI_TRANSITIONS=105} [2024-01-31 16:46:47,498 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 118 predicate places. [2024-01-31 16:46:47,498 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 105 transitions, 1490 flow [2024-01-31 16:46:47,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:47,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:47,498 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] [2024-01-31 16:46:47,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-01-31 16:46:47,498 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:47,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:47,498 INFO L85 PathProgramCache]: Analyzing trace with hash 251694370, now seen corresponding path program 7 times [2024-01-31 16:46:47,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:47,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872889453] [2024-01-31 16:46:47,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:47,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:47,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:47,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872889453] [2024-01-31 16:46:47,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872889453] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:47,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808828498] [2024-01-31 16:46:47,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:46:47,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:47,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:47,700 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:46:47,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-31 16:46:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:47,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 16:46:47,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:47,992 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-01-31 16:46:47,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-31 16:46:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:48,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:48,116 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:46:48,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:46:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:48,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808828498] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:46:48,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:46:48,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 27 [2024-01-31 16:46:48,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744828481] [2024-01-31 16:46:48,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:46:48,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 16:46:48,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:48,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 16:46:48,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2024-01-31 16:46:48,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:48,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 105 transitions, 1490 flow. Second operand has 28 states, 28 states have (on average 5.178571428571429) internal successors, (145), 28 states have internal predecessors, (145), 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) [2024-01-31 16:46:48,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:48,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:48,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:50,313 INFO L124 PetriNetUnfolderBase]: 4110/7322 cut-off events. [2024-01-31 16:46:50,313 INFO L125 PetriNetUnfolderBase]: For 50487/50487 co-relation queries the response was YES. [2024-01-31 16:46:50,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34990 conditions, 7322 events. 4110/7322 cut-off events. For 50487/50487 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 51905 event pairs, 1412 based on Foata normal form. 75/7397 useless extension candidates. Maximal degree in co-relation 34130. Up to 1845 conditions per place. [2024-01-31 16:46:50,350 INFO L140 encePairwiseOnDemand]: 15/29 looper letters, 373 selfloop transitions, 151 changer transitions 4/529 dead transitions. [2024-01-31 16:46:50,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 529 transitions, 6826 flow [2024-01-31 16:46:50,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-01-31 16:46:50,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-01-31 16:46:50,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 452 transitions. [2024-01-31 16:46:50,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3624699278267843 [2024-01-31 16:46:50,353 INFO L175 Difference]: Start difference. First operand has 145 places, 105 transitions, 1490 flow. Second operand 43 states and 452 transitions. [2024-01-31 16:46:50,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 529 transitions, 6826 flow [2024-01-31 16:46:50,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 529 transitions, 6507 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-01-31 16:46:50,472 INFO L231 Difference]: Finished difference. Result has 186 places, 224 transitions, 3819 flow [2024-01-31 16:46:50,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1389, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=3819, PETRI_PLACES=186, PETRI_TRANSITIONS=224} [2024-01-31 16:46:50,472 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 159 predicate places. [2024-01-31 16:46:50,473 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 224 transitions, 3819 flow [2024-01-31 16:46:50,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.178571428571429) internal successors, (145), 28 states have internal predecessors, (145), 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) [2024-01-31 16:46:50,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:50,473 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] [2024-01-31 16:46:50,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:50,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:50,681 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:50,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:50,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1203195778, now seen corresponding path program 10 times [2024-01-31 16:46:50,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:50,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41054282] [2024-01-31 16:46:50,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:50,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:50,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:50,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41054282] [2024-01-31 16:46:50,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41054282] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:50,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:50,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:46:50,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269024256] [2024-01-31 16:46:50,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:50,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:46:50,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:50,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:46:50,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:46:50,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:50,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 224 transitions, 3819 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:50,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:50,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:50,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:51,923 INFO L124 PetriNetUnfolderBase]: 3978/7054 cut-off events. [2024-01-31 16:46:51,924 INFO L125 PetriNetUnfolderBase]: For 56140/56140 co-relation queries the response was YES. [2024-01-31 16:46:51,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35839 conditions, 7054 events. 3978/7054 cut-off events. For 56140/56140 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 49555 event pairs, 2261 based on Foata normal form. 18/7069 useless extension candidates. Maximal degree in co-relation 35021. Up to 5732 conditions per place. [2024-01-31 16:46:51,969 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 138 selfloop transitions, 95 changer transitions 13/247 dead transitions. [2024-01-31 16:46:51,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 247 transitions, 4364 flow [2024-01-31 16:46:51,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:46:51,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:46:51,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2024-01-31 16:46:51,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3486590038314176 [2024-01-31 16:46:51,970 INFO L175 Difference]: Start difference. First operand has 186 places, 224 transitions, 3819 flow. Second operand 9 states and 91 transitions. [2024-01-31 16:46:51,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 247 transitions, 4364 flow [2024-01-31 16:46:52,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 247 transitions, 4214 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-01-31 16:46:52,158 INFO L231 Difference]: Finished difference. Result has 191 places, 216 transitions, 3735 flow [2024-01-31 16:46:52,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3612, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3735, PETRI_PLACES=191, PETRI_TRANSITIONS=216} [2024-01-31 16:46:52,159 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 164 predicate places. [2024-01-31 16:46:52,159 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 216 transitions, 3735 flow [2024-01-31 16:46:52,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:52,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:52,159 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] [2024-01-31 16:46:52,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-01-31 16:46:52,159 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:52,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:52,159 INFO L85 PathProgramCache]: Analyzing trace with hash 361119578, now seen corresponding path program 8 times [2024-01-31 16:46:52,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:52,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991985098] [2024-01-31 16:46:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:52,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:52,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:52,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991985098] [2024-01-31 16:46:52,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991985098] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:52,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:52,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:46:52,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290442363] [2024-01-31 16:46:52,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:52,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:46:52,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:52,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:46:52,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:46:52,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:52,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 216 transitions, 3735 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:52,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:52,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:52,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:53,391 INFO L124 PetriNetUnfolderBase]: 3874/6834 cut-off events. [2024-01-31 16:46:53,391 INFO L125 PetriNetUnfolderBase]: For 56224/56224 co-relation queries the response was YES. [2024-01-31 16:46:53,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34937 conditions, 6834 events. 3874/6834 cut-off events. For 56224/56224 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 47410 event pairs, 2201 based on Foata normal form. 12/6846 useless extension candidates. Maximal degree in co-relation 34246. Up to 5572 conditions per place. [2024-01-31 16:46:53,428 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 124 selfloop transitions, 103 changer transitions 5/233 dead transitions. [2024-01-31 16:46:53,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 233 transitions, 4223 flow [2024-01-31 16:46:53,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:46:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:46:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-01-31 16:46:53,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32950191570881227 [2024-01-31 16:46:53,429 INFO L175 Difference]: Start difference. First operand has 191 places, 216 transitions, 3735 flow. Second operand 9 states and 86 transitions. [2024-01-31 16:46:53,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 233 transitions, 4223 flow [2024-01-31 16:46:53,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 233 transitions, 4009 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-01-31 16:46:53,584 INFO L231 Difference]: Finished difference. Result has 181 places, 209 transitions, 3614 flow [2024-01-31 16:46:53,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3447, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3614, PETRI_PLACES=181, PETRI_TRANSITIONS=209} [2024-01-31 16:46:53,584 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 154 predicate places. [2024-01-31 16:46:53,584 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 209 transitions, 3614 flow [2024-01-31 16:46:53,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:53,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:53,585 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] [2024-01-31 16:46:53,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-01-31 16:46:53,585 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:53,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:53,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1398933362, now seen corresponding path program 9 times [2024-01-31 16:46:53,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:53,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437569826] [2024-01-31 16:46:53,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:53,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:53,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:53,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437569826] [2024-01-31 16:46:53,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437569826] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:53,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:53,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:46:53,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714730781] [2024-01-31 16:46:53,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:53,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:46:53,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:53,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:46:53,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:46:53,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:53,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 209 transitions, 3614 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:53,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:53,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:53,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:54,878 INFO L124 PetriNetUnfolderBase]: 3814/6705 cut-off events. [2024-01-31 16:46:54,878 INFO L125 PetriNetUnfolderBase]: For 55156/55156 co-relation queries the response was YES. [2024-01-31 16:46:54,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34388 conditions, 6705 events. 3814/6705 cut-off events. For 55156/55156 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 46073 event pairs, 2161 based on Foata normal form. 12/6717 useless extension candidates. Maximal degree in co-relation 33574. Up to 5464 conditions per place. [2024-01-31 16:46:54,914 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 126 selfloop transitions, 93 changer transitions 5/225 dead transitions. [2024-01-31 16:46:54,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 225 transitions, 4070 flow [2024-01-31 16:46:54,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:46:54,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:46:54,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 85 transitions. [2024-01-31 16:46:54,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32567049808429116 [2024-01-31 16:46:54,915 INFO L175 Difference]: Start difference. First operand has 181 places, 209 transitions, 3614 flow. Second operand 9 states and 85 transitions. [2024-01-31 16:46:54,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 225 transitions, 4070 flow [2024-01-31 16:46:55,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 225 transitions, 3870 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-01-31 16:46:55,065 INFO L231 Difference]: Finished difference. Result has 178 places, 202 transitions, 3464 flow [2024-01-31 16:46:55,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3326, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3464, PETRI_PLACES=178, PETRI_TRANSITIONS=202} [2024-01-31 16:46:55,066 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 151 predicate places. [2024-01-31 16:46:55,066 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 202 transitions, 3464 flow [2024-01-31 16:46:55,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:55,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:55,066 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] [2024-01-31 16:46:55,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-01-31 16:46:55,066 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:55,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:55,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2081696544, now seen corresponding path program 11 times [2024-01-31 16:46:55,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:55,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599544766] [2024-01-31 16:46:55,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:55,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:55,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:55,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599544766] [2024-01-31 16:46:55,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599544766] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:55,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823264398] [2024-01-31 16:46:55,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:46:55,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:55,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:55,233 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:46:55,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-31 16:46:55,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:46:55,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:55,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-31 16:46:55,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:55,410 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-01-31 16:46:55,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-01-31 16:46:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:55,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:55,504 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:46:55,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:46:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:55,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823264398] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:46:55,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:46:55,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 20 [2024-01-31 16:46:55,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187691254] [2024-01-31 16:46:55,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:46:55,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:46:55,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:55,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:46:55,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:46:55,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:55,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 202 transitions, 3464 flow. Second operand has 20 states, 20 states have (on average 5.55) internal successors, (111), 20 states have internal predecessors, (111), 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) [2024-01-31 16:46:55,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:55,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:55,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:57,110 INFO L124 PetriNetUnfolderBase]: 5617/9876 cut-off events. [2024-01-31 16:46:57,110 INFO L125 PetriNetUnfolderBase]: For 70971/70971 co-relation queries the response was YES. [2024-01-31 16:46:57,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47661 conditions, 9876 events. 5617/9876 cut-off events. For 70971/70971 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 72719 event pairs, 1777 based on Foata normal form. 36/9912 useless extension candidates. Maximal degree in co-relation 46458. Up to 4002 conditions per place. [2024-01-31 16:46:57,169 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 248 selfloop transitions, 105 changer transitions 0/354 dead transitions. [2024-01-31 16:46:57,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 354 transitions, 6118 flow [2024-01-31 16:46:57,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:46:57,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:46:57,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-01-31 16:46:57,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-01-31 16:46:57,171 INFO L175 Difference]: Start difference. First operand has 178 places, 202 transitions, 3464 flow. Second operand 12 states and 145 transitions. [2024-01-31 16:46:57,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 354 transitions, 6118 flow [2024-01-31 16:46:57,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 354 transitions, 5835 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-01-31 16:46:57,403 INFO L231 Difference]: Finished difference. Result has 184 places, 238 transitions, 4335 flow [2024-01-31 16:46:57,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3257, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4335, PETRI_PLACES=184, PETRI_TRANSITIONS=238} [2024-01-31 16:46:57,403 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 157 predicate places. [2024-01-31 16:46:57,403 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 238 transitions, 4335 flow [2024-01-31 16:46:57,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.55) internal successors, (111), 20 states have internal predecessors, (111), 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) [2024-01-31 16:46:57,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:57,404 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] [2024-01-31 16:46:57,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-01-31 16:46:57,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-01-31 16:46:57,614 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:57,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:57,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1466351022, now seen corresponding path program 12 times [2024-01-31 16:46:57,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:57,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139298657] [2024-01-31 16:46:57,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:57,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:57,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:57,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139298657] [2024-01-31 16:46:57,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139298657] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:57,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:57,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:46:57,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866151271] [2024-01-31 16:46:57,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:57,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:46:57,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:57,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:46:57,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:46:57,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:57,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 238 transitions, 4335 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:57,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:57,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:57,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:59,417 INFO L124 PetriNetUnfolderBase]: 5617/9894 cut-off events. [2024-01-31 16:46:59,418 INFO L125 PetriNetUnfolderBase]: For 87004/87004 co-relation queries the response was YES. [2024-01-31 16:46:59,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51058 conditions, 9894 events. 5617/9894 cut-off events. For 87004/87004 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 72672 event pairs, 3088 based on Foata normal form. 18/9912 useless extension candidates. Maximal degree in co-relation 49848. Up to 7308 conditions per place. [2024-01-31 16:46:59,496 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 186 selfloop transitions, 78 changer transitions 5/270 dead transitions. [2024-01-31 16:46:59,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 270 transitions, 5059 flow [2024-01-31 16:46:59,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:46:59,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:46:59,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2024-01-31 16:46:59,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3486590038314176 [2024-01-31 16:46:59,498 INFO L175 Difference]: Start difference. First operand has 184 places, 238 transitions, 4335 flow. Second operand 9 states and 91 transitions. [2024-01-31 16:46:59,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 270 transitions, 5059 flow [2024-01-31 16:46:59,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 270 transitions, 4903 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-01-31 16:46:59,834 INFO L231 Difference]: Finished difference. Result has 188 places, 238 transitions, 4347 flow [2024-01-31 16:46:59,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4185, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4347, PETRI_PLACES=188, PETRI_TRANSITIONS=238} [2024-01-31 16:46:59,835 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 161 predicate places. [2024-01-31 16:46:59,835 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 238 transitions, 4347 flow [2024-01-31 16:46:59,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:46:59,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:59,835 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] [2024-01-31 16:46:59,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-01-31 16:46:59,836 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:59,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:59,836 INFO L85 PathProgramCache]: Analyzing trace with hash 875703538, now seen corresponding path program 13 times [2024-01-31 16:46:59,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:59,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429587179] [2024-01-31 16:46:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:59,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:47:00,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:00,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429587179] [2024-01-31 16:47:00,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429587179] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:00,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510019513] [2024-01-31 16:47:00,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:47:00,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:00,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:00,101 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:00,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-31 16:47:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:00,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 16:47:00,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:00,347 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-01-31 16:47:00,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-31 16:47:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:47:00,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:00,460 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:47:00,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:47:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:47:00,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510019513] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:00,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:00,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 27 [2024-01-31 16:47:00,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588894184] [2024-01-31 16:47:00,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:00,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 16:47:00,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:00,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 16:47:00,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2024-01-31 16:47:00,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:00,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 238 transitions, 4347 flow. Second operand has 28 states, 28 states have (on average 5.178571428571429) internal successors, (145), 28 states have internal predecessors, (145), 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) [2024-01-31 16:47:00,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:00,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:00,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:03,069 INFO L124 PetriNetUnfolderBase]: 5980/10535 cut-off events. [2024-01-31 16:47:03,069 INFO L125 PetriNetUnfolderBase]: For 89535/89535 co-relation queries the response was YES. [2024-01-31 16:47:03,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54507 conditions, 10535 events. 5980/10535 cut-off events. For 89535/89535 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 78245 event pairs, 2062 based on Foata normal form. 56/10591 useless extension candidates. Maximal degree in co-relation 53081. Up to 2396 conditions per place. [2024-01-31 16:47:03,132 INFO L140 encePairwiseOnDemand]: 15/29 looper letters, 418 selfloop transitions, 174 changer transitions 2/595 dead transitions. [2024-01-31 16:47:03,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 595 transitions, 9006 flow [2024-01-31 16:47:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-31 16:47:03,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-31 16:47:03,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 436 transitions. [2024-01-31 16:47:03,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956442831215971 [2024-01-31 16:47:03,133 INFO L175 Difference]: Start difference. First operand has 188 places, 238 transitions, 4347 flow. Second operand 38 states and 436 transitions. [2024-01-31 16:47:03,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 595 transitions, 9006 flow [2024-01-31 16:47:03,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 595 transitions, 8837 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-31 16:47:03,465 INFO L231 Difference]: Finished difference. Result has 232 places, 307 transitions, 6152 flow [2024-01-31 16:47:03,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4254, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=6152, PETRI_PLACES=232, PETRI_TRANSITIONS=307} [2024-01-31 16:47:03,465 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 205 predicate places. [2024-01-31 16:47:03,465 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 307 transitions, 6152 flow [2024-01-31 16:47:03,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.178571428571429) internal successors, (145), 28 states have internal predecessors, (145), 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) [2024-01-31 16:47:03,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:03,466 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] [2024-01-31 16:47:03,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:03,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:03,676 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:03,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:03,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1927259026, now seen corresponding path program 14 times [2024-01-31 16:47:03,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:03,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922618685] [2024-01-31 16:47:03,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:03,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:47:03,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:03,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922618685] [2024-01-31 16:47:03,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922618685] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:03,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539322140] [2024-01-31 16:47:03,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:47:03,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:03,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:03,850 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:03,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-31 16:47:03,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:47:03,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:03,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:47:03,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:04,007 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 16:47:04,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-01-31 16:47:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:47:04,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:04,083 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:47:04,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:47:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:47:04,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539322140] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:04,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:04,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-01-31 16:47:04,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969065928] [2024-01-31 16:47:04,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:04,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:47:04,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:04,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:47:04,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:47:04,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:04,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 307 transitions, 6152 flow. Second operand has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 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) [2024-01-31 16:47:04,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:04,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:04,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:05,878 INFO L124 PetriNetUnfolderBase]: 5764/10130 cut-off events. [2024-01-31 16:47:05,878 INFO L125 PetriNetUnfolderBase]: For 97779/97779 co-relation queries the response was YES. [2024-01-31 16:47:05,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54933 conditions, 10130 events. 5764/10130 cut-off events. For 97779/97779 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 75720 event pairs, 535 based on Foata normal form. 54/10184 useless extension candidates. Maximal degree in co-relation 54583. Up to 7004 conditions per place. [2024-01-31 16:47:05,949 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 226 selfloop transitions, 139 changer transitions 3/369 dead transitions. [2024-01-31 16:47:05,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 369 transitions, 7477 flow [2024-01-31 16:47:05,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:47:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:47:05,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-01-31 16:47:05,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586206896551724 [2024-01-31 16:47:05,950 INFO L175 Difference]: Start difference. First operand has 232 places, 307 transitions, 6152 flow. Second operand 10 states and 104 transitions. [2024-01-31 16:47:05,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 369 transitions, 7477 flow [2024-01-31 16:47:06,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 369 transitions, 7114 flow, removed 77 selfloop flow, removed 12 redundant places. [2024-01-31 16:47:06,532 INFO L231 Difference]: Finished difference. Result has 231 places, 311 transitions, 6214 flow [2024-01-31 16:47:06,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5801, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6214, PETRI_PLACES=231, PETRI_TRANSITIONS=311} [2024-01-31 16:47:06,533 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 204 predicate places. [2024-01-31 16:47:06,533 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 311 transitions, 6214 flow [2024-01-31 16:47:06,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 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) [2024-01-31 16:47:06,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:06,533 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] [2024-01-31 16:47:06,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:06,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-01-31 16:47:06,733 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:06,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:06,734 INFO L85 PathProgramCache]: Analyzing trace with hash 18950764, now seen corresponding path program 10 times [2024-01-31 16:47:06,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:06,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115001389] [2024-01-31 16:47:06,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:06,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:47:06,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:06,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115001389] [2024-01-31 16:47:06,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115001389] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:47:06,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:47:06,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:47:06,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667217043] [2024-01-31 16:47:06,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:47:06,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:47:06,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:06,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:47:06,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:47:06,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:06,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 311 transitions, 6214 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:47:06,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:06,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:06,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:08,605 INFO L124 PetriNetUnfolderBase]: 5863/10301 cut-off events. [2024-01-31 16:47:08,605 INFO L125 PetriNetUnfolderBase]: For 105163/105163 co-relation queries the response was YES. [2024-01-31 16:47:08,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57142 conditions, 10301 events. 5863/10301 cut-off events. For 105163/105163 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 75645 event pairs, 3033 based on Foata normal form. 72/10373 useless extension candidates. Maximal degree in co-relation 56812. Up to 7655 conditions per place. [2024-01-31 16:47:08,684 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 240 selfloop transitions, 127 changer transitions 0/368 dead transitions. [2024-01-31 16:47:08,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 368 transitions, 7473 flow [2024-01-31 16:47:08,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:47:08,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:47:08,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-01-31 16:47:08,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099616858237548 [2024-01-31 16:47:08,685 INFO L175 Difference]: Start difference. First operand has 231 places, 311 transitions, 6214 flow. Second operand 9 states and 107 transitions. [2024-01-31 16:47:08,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 368 transitions, 7473 flow [2024-01-31 16:47:09,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 368 transitions, 7152 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-01-31 16:47:09,154 INFO L231 Difference]: Finished difference. Result has 234 places, 319 transitions, 6399 flow [2024-01-31 16:47:09,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5917, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6399, PETRI_PLACES=234, PETRI_TRANSITIONS=319} [2024-01-31 16:47:09,155 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 207 predicate places. [2024-01-31 16:47:09,155 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 319 transitions, 6399 flow [2024-01-31 16:47:09,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:47:09,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:09,155 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] [2024-01-31 16:47:09,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-01-31 16:47:09,156 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:09,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:09,156 INFO L85 PathProgramCache]: Analyzing trace with hash -131419718, now seen corresponding path program 15 times [2024-01-31 16:47:09,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:09,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480768056] [2024-01-31 16:47:09,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:09,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:47:09,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:09,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480768056] [2024-01-31 16:47:09,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480768056] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:47:09,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:47:09,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:47:09,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158594866] [2024-01-31 16:47:09,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:47:09,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:47:09,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:09,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:47:09,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:47:09,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:09,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 319 transitions, 6399 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:47:09,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:09,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:09,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:11,089 INFO L124 PetriNetUnfolderBase]: 5884/10346 cut-off events. [2024-01-31 16:47:11,089 INFO L125 PetriNetUnfolderBase]: For 102486/102486 co-relation queries the response was YES. [2024-01-31 16:47:11,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57178 conditions, 10346 events. 5884/10346 cut-off events. For 102486/102486 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 76051 event pairs, 3153 based on Foata normal form. 18/10364 useless extension candidates. Maximal degree in co-relation 56847. Up to 7661 conditions per place. [2024-01-31 16:47:11,323 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 214 selfloop transitions, 140 changer transitions 6/361 dead transitions. [2024-01-31 16:47:11,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 361 transitions, 7547 flow [2024-01-31 16:47:11,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:47:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:47:11,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-01-31 16:47:11,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3716475095785441 [2024-01-31 16:47:11,324 INFO L175 Difference]: Start difference. First operand has 234 places, 319 transitions, 6399 flow. Second operand 9 states and 97 transitions. [2024-01-31 16:47:11,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 361 transitions, 7547 flow [2024-01-31 16:47:11,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 361 transitions, 7306 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-01-31 16:47:11,756 INFO L231 Difference]: Finished difference. Result has 239 places, 329 transitions, 6717 flow [2024-01-31 16:47:11,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6175, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6717, PETRI_PLACES=239, PETRI_TRANSITIONS=329} [2024-01-31 16:47:11,757 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 212 predicate places. [2024-01-31 16:47:11,757 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 329 transitions, 6717 flow [2024-01-31 16:47:11,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:47:11,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:11,757 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] [2024-01-31 16:47:11,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-01-31 16:47:11,757 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:11,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:11,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1141990120, now seen corresponding path program 16 times [2024-01-31 16:47:11,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:11,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289505055] [2024-01-31 16:47:11,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:11,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:47:11,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:11,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289505055] [2024-01-31 16:47:11,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289505055] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:47:11,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:47:11,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:47:11,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884828980] [2024-01-31 16:47:11,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:47:11,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:47:11,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:11,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:47:11,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:47:11,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:11,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 329 transitions, 6717 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:47:11,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:11,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:11,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:13,833 INFO L124 PetriNetUnfolderBase]: 5812/10208 cut-off events. [2024-01-31 16:47:13,833 INFO L125 PetriNetUnfolderBase]: For 98406/98406 co-relation queries the response was YES. [2024-01-31 16:47:13,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55650 conditions, 10208 events. 5812/10208 cut-off events. For 98406/98406 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 74727 event pairs, 3121 based on Foata normal form. 18/10226 useless extension candidates. Maximal degree in co-relation 55317. Up to 7549 conditions per place. [2024-01-31 16:47:13,899 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 214 selfloop transitions, 135 changer transitions 6/356 dead transitions. [2024-01-31 16:47:13,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 356 transitions, 7524 flow [2024-01-31 16:47:13,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:47:13,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:47:13,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 93 transitions. [2024-01-31 16:47:13,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563218390804598 [2024-01-31 16:47:13,899 INFO L175 Difference]: Start difference. First operand has 239 places, 329 transitions, 6717 flow. Second operand 9 states and 93 transitions. [2024-01-31 16:47:13,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 356 transitions, 7524 flow [2024-01-31 16:47:14,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 356 transitions, 7272 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-01-31 16:47:14,315 INFO L231 Difference]: Finished difference. Result has 240 places, 327 transitions, 6706 flow [2024-01-31 16:47:14,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6385, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6706, PETRI_PLACES=240, PETRI_TRANSITIONS=327} [2024-01-31 16:47:14,316 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 213 predicate places. [2024-01-31 16:47:14,316 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 327 transitions, 6706 flow [2024-01-31 16:47:14,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:47:14,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:14,316 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] [2024-01-31 16:47:14,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-01-31 16:47:14,316 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:14,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:14,317 INFO L85 PathProgramCache]: Analyzing trace with hash -731887320, now seen corresponding path program 11 times [2024-01-31 16:47:14,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:14,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099687482] [2024-01-31 16:47:14,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:14,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:47:14,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:14,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099687482] [2024-01-31 16:47:14,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099687482] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:14,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298064574] [2024-01-31 16:47:14,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:47:14,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:14,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:14,493 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:14,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-31 16:47:14,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:47:14,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:14,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:47:14,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:47:14,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:14,759 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-31 16:47:14,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-31 16:47:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:47:14,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298064574] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:14,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:47:14,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8] total 21 [2024-01-31 16:47:14,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885117832] [2024-01-31 16:47:14,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:47:14,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:47:14,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:14,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:47:14,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:47:14,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:14,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 327 transitions, 6706 flow. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:14,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:14,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:14,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:16,521 INFO L124 PetriNetUnfolderBase]: 6079/10748 cut-off events. [2024-01-31 16:47:16,521 INFO L125 PetriNetUnfolderBase]: For 103411/103411 co-relation queries the response was YES. [2024-01-31 16:47:16,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58660 conditions, 10748 events. 6079/10748 cut-off events. For 103411/103411 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 80190 event pairs, 3117 based on Foata normal form. 72/10820 useless extension candidates. Maximal degree in co-relation 58327. Up to 7634 conditions per place. [2024-01-31 16:47:16,599 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 240 selfloop transitions, 140 changer transitions 0/381 dead transitions. [2024-01-31 16:47:16,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 381 transitions, 8080 flow [2024-01-31 16:47:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:47:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:47:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-01-31 16:47:16,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4729064039408867 [2024-01-31 16:47:16,600 INFO L175 Difference]: Start difference. First operand has 240 places, 327 transitions, 6706 flow. Second operand 7 states and 96 transitions. [2024-01-31 16:47:16,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 381 transitions, 8080 flow [2024-01-31 16:47:17,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 381 transitions, 7823 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-01-31 16:47:17,260 INFO L231 Difference]: Finished difference. Result has 241 places, 341 transitions, 7162 flow [2024-01-31 16:47:17,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6467, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7162, PETRI_PLACES=241, PETRI_TRANSITIONS=341} [2024-01-31 16:47:17,260 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 214 predicate places. [2024-01-31 16:47:17,260 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 341 transitions, 7162 flow [2024-01-31 16:47:17,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:17,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:17,260 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] [2024-01-31 16:47:17,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:17,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-01-31 16:47:17,461 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:17,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:17,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1133120326, now seen corresponding path program 17 times [2024-01-31 16:47:17,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:17,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953953232] [2024-01-31 16:47:17,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:17,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:47:17,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:17,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953953232] [2024-01-31 16:47:17,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953953232] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:47:17,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:47:17,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:47:17,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993583933] [2024-01-31 16:47:17,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:47:17,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:47:17,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:17,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:47:17,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:47:17,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:17,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 341 transitions, 7162 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:47:17,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:17,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:17,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:19,658 INFO L124 PetriNetUnfolderBase]: 6061/10730 cut-off events. [2024-01-31 16:47:19,658 INFO L125 PetriNetUnfolderBase]: For 101332/101332 co-relation queries the response was YES. [2024-01-31 16:47:19,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58633 conditions, 10730 events. 6061/10730 cut-off events. For 101332/101332 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 80300 event pairs, 2985 based on Foata normal form. 18/10747 useless extension candidates. Maximal degree in co-relation 58254. Up to 7603 conditions per place. [2024-01-31 16:47:19,731 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 223 selfloop transitions, 143 changer transitions 8/375 dead transitions. [2024-01-31 16:47:19,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 375 transitions, 8118 flow [2024-01-31 16:47:19,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:47:19,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:47:19,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 90 transitions. [2024-01-31 16:47:19,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-01-31 16:47:19,732 INFO L175 Difference]: Start difference. First operand has 241 places, 341 transitions, 7162 flow. Second operand 9 states and 90 transitions. [2024-01-31 16:47:19,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 375 transitions, 8118 flow [2024-01-31 16:47:20,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 375 transitions, 8006 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-01-31 16:47:20,274 INFO L231 Difference]: Finished difference. Result has 249 places, 337 transitions, 7252 flow [2024-01-31 16:47:20,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6985, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7252, PETRI_PLACES=249, PETRI_TRANSITIONS=337} [2024-01-31 16:47:20,274 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 222 predicate places. [2024-01-31 16:47:20,274 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 337 transitions, 7252 flow [2024-01-31 16:47:20,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:47:20,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:20,275 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] [2024-01-31 16:47:20,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-01-31 16:47:20,275 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:20,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:20,275 INFO L85 PathProgramCache]: Analyzing trace with hash 932774026, now seen corresponding path program 12 times [2024-01-31 16:47:20,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:20,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238242832] [2024-01-31 16:47:20,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:20,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:47:20,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:20,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238242832] [2024-01-31 16:47:20,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238242832] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:47:20,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:47:20,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:47:20,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135825138] [2024-01-31 16:47:20,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:47:20,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:47:20,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:20,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:47:20,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:47:20,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:20,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 337 transitions, 7252 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:47:20,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:20,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:20,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:22,336 INFO L124 PetriNetUnfolderBase]: 6037/10670 cut-off events. [2024-01-31 16:47:22,337 INFO L125 PetriNetUnfolderBase]: For 108502/108502 co-relation queries the response was YES. [2024-01-31 16:47:22,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58589 conditions, 10670 events. 6037/10670 cut-off events. For 108502/108502 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 79417 event pairs, 3199 based on Foata normal form. 12/10682 useless extension candidates. Maximal degree in co-relation 58209. Up to 7603 conditions per place. [2024-01-31 16:47:22,427 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 205 selfloop transitions, 144 changer transitions 5/355 dead transitions. [2024-01-31 16:47:22,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 355 transitions, 7969 flow [2024-01-31 16:47:22,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:47:22,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:47:22,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-01-31 16:47:22,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32950191570881227 [2024-01-31 16:47:22,428 INFO L175 Difference]: Start difference. First operand has 249 places, 337 transitions, 7252 flow. Second operand 9 states and 86 transitions. [2024-01-31 16:47:22,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 355 transitions, 7969 flow [2024-01-31 16:47:23,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 355 transitions, 7768 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-01-31 16:47:23,029 INFO L231 Difference]: Finished difference. Result has 247 places, 331 transitions, 7168 flow [2024-01-31 16:47:23,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6952, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7168, PETRI_PLACES=247, PETRI_TRANSITIONS=331} [2024-01-31 16:47:23,030 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 220 predicate places. [2024-01-31 16:47:23,030 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 331 transitions, 7168 flow [2024-01-31 16:47:23,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:47:23,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:23,030 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] [2024-01-31 16:47:23,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-01-31 16:47:23,030 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:23,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:23,030 INFO L85 PathProgramCache]: Analyzing trace with hash 598818758, now seen corresponding path program 13 times [2024-01-31 16:47:23,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:23,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052070744] [2024-01-31 16:47:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:23,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:47:23,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:23,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052070744] [2024-01-31 16:47:23,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052070744] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:47:23,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:47:23,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:47:23,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247036525] [2024-01-31 16:47:23,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:47:23,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:47:23,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:23,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:47:23,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:47:23,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:23,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 331 transitions, 7168 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:47:23,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:23,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:23,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:25,016 INFO L124 PetriNetUnfolderBase]: 6019/10640 cut-off events. [2024-01-31 16:47:25,016 INFO L125 PetriNetUnfolderBase]: For 110076/110076 co-relation queries the response was YES. [2024-01-31 16:47:25,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57949 conditions, 10640 events. 6019/10640 cut-off events. For 110076/110076 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 79228 event pairs, 3201 based on Foata normal form. 12/10652 useless extension candidates. Maximal degree in co-relation 57571. Up to 7603 conditions per place. [2024-01-31 16:47:25,266 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 208 selfloop transitions, 136 changer transitions 5/350 dead transitions. [2024-01-31 16:47:25,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 350 transitions, 7871 flow [2024-01-31 16:47:25,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:47:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:47:25,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-01-31 16:47:25,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32950191570881227 [2024-01-31 16:47:25,267 INFO L175 Difference]: Start difference. First operand has 247 places, 331 transitions, 7168 flow. Second operand 9 states and 86 transitions. [2024-01-31 16:47:25,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 350 transitions, 7871 flow [2024-01-31 16:47:25,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 350 transitions, 7596 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-31 16:47:25,768 INFO L231 Difference]: Finished difference. Result has 248 places, 325 transitions, 6976 flow [2024-01-31 16:47:25,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6788, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6976, PETRI_PLACES=248, PETRI_TRANSITIONS=325} [2024-01-31 16:47:25,769 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 221 predicate places. [2024-01-31 16:47:25,769 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 325 transitions, 6976 flow [2024-01-31 16:47:25,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:47:25,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:25,769 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] [2024-01-31 16:47:25,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-01-31 16:47:25,770 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:25,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:25,770 INFO L85 PathProgramCache]: Analyzing trace with hash 596810100, now seen corresponding path program 14 times [2024-01-31 16:47:25,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:25,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684993422] [2024-01-31 16:47:25,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:25,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:47:25,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:25,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684993422] [2024-01-31 16:47:25,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684993422] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:25,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462639988] [2024-01-31 16:47:25,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:47:25,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:25,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:25,951 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:25,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-31 16:47:26,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:47:26,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:26,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:47:26,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:26,109 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:26,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-01-31 16:47:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:47:26,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:26,178 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-31 16:47:26,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-31 16:47:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:47:26,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462639988] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:26,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:26,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-01-31 16:47:26,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624918788] [2024-01-31 16:47:26,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:26,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:47:26,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:26,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:47:26,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:47:26,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:26,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 325 transitions, 6976 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 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) [2024-01-31 16:47:26,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:26,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:26,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:28,302 INFO L124 PetriNetUnfolderBase]: 6112/10793 cut-off events. [2024-01-31 16:47:28,303 INFO L125 PetriNetUnfolderBase]: For 116603/116603 co-relation queries the response was YES. [2024-01-31 16:47:28,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59311 conditions, 10793 events. 6112/10793 cut-off events. For 116603/116603 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 80528 event pairs, 3073 based on Foata normal form. 72/10865 useless extension candidates. Maximal degree in co-relation 58889. Up to 7675 conditions per place. [2024-01-31 16:47:28,377 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 236 selfloop transitions, 157 changer transitions 0/394 dead transitions. [2024-01-31 16:47:28,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 394 transitions, 8436 flow [2024-01-31 16:47:28,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:47:28,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:47:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 132 transitions. [2024-01-31 16:47:28,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35013262599469497 [2024-01-31 16:47:28,393 INFO L175 Difference]: Start difference. First operand has 248 places, 325 transitions, 6976 flow. Second operand 13 states and 132 transitions. [2024-01-31 16:47:28,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 394 transitions, 8436 flow [2024-01-31 16:47:28,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 394 transitions, 8134 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-01-31 16:47:28,908 INFO L231 Difference]: Finished difference. Result has 255 places, 346 transitions, 7480 flow [2024-01-31 16:47:28,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6706, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7480, PETRI_PLACES=255, PETRI_TRANSITIONS=346} [2024-01-31 16:47:28,909 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 228 predicate places. [2024-01-31 16:47:28,909 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 346 transitions, 7480 flow [2024-01-31 16:47:28,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 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) [2024-01-31 16:47:28,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:28,909 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] [2024-01-31 16:47:28,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:29,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-01-31 16:47:29,110 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:29,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:29,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1656724376, now seen corresponding path program 15 times [2024-01-31 16:47:29,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:29,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134322857] [2024-01-31 16:47:29,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:29,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:47:29,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:29,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134322857] [2024-01-31 16:47:29,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134322857] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:47:29,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:47:29,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:47:29,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690976569] [2024-01-31 16:47:29,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:47:29,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:47:29,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:29,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:47:29,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:47:29,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:29,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 346 transitions, 7480 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:47:29,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:29,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:29,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:31,137 INFO L124 PetriNetUnfolderBase]: 5974/10484 cut-off events. [2024-01-31 16:47:31,137 INFO L125 PetriNetUnfolderBase]: For 115868/115868 co-relation queries the response was YES. [2024-01-31 16:47:31,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58911 conditions, 10484 events. 5974/10484 cut-off events. For 115868/115868 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 77074 event pairs, 3081 based on Foata normal form. 12/10496 useless extension candidates. Maximal degree in co-relation 58530. Up to 7675 conditions per place. [2024-01-31 16:47:31,214 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 208 selfloop transitions, 147 changer transitions 8/364 dead transitions. [2024-01-31 16:47:31,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 364 transitions, 8202 flow [2024-01-31 16:47:31,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:47:31,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:47:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 85 transitions. [2024-01-31 16:47:31,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32567049808429116 [2024-01-31 16:47:31,215 INFO L175 Difference]: Start difference. First operand has 255 places, 346 transitions, 7480 flow. Second operand 9 states and 85 transitions. [2024-01-31 16:47:31,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 364 transitions, 8202 flow [2024-01-31 16:47:31,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 364 transitions, 8058 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-01-31 16:47:31,780 INFO L231 Difference]: Finished difference. Result has 255 places, 339 transitions, 7437 flow [2024-01-31 16:47:31,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=7231, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7437, PETRI_PLACES=255, PETRI_TRANSITIONS=339} [2024-01-31 16:47:31,781 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 228 predicate places. [2024-01-31 16:47:31,781 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 339 transitions, 7437 flow [2024-01-31 16:47:31,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 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) [2024-01-31 16:47:31,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:31,781 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] [2024-01-31 16:47:31,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-01-31 16:47:31,781 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:31,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:31,781 INFO L85 PathProgramCache]: Analyzing trace with hash 2131871696, now seen corresponding path program 18 times [2024-01-31 16:47:31,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:31,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758620974] [2024-01-31 16:47:31,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:31,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:47:32,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:32,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758620974] [2024-01-31 16:47:32,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758620974] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:32,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209924675] [2024-01-31 16:47:32,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:47:32,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:32,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:32,141 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:32,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-31 16:47:32,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 16:47:32,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:32,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:47:32,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:32,313 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:32,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-01-31 16:47:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:47:32,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:32,401 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:47:32,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:47:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:47:32,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209924675] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:32,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:32,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-01-31 16:47:32,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730259343] [2024-01-31 16:47:32,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:32,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:47:32,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:32,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:47:32,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:47:32,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:32,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 339 transitions, 7437 flow. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 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) [2024-01-31 16:47:32,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:32,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:32,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand