./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.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/popl20-prod-cons.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/popl20-prod-cons.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-prod-cons.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 17:15:49,579 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:15:49,637 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:15:49,642 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:15:49,642 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:15:49,671 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:15:49,671 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:15:49,672 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:15:49,672 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:15:49,675 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:15:49,676 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:15:49,676 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:15:49,676 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:15:49,677 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:15:49,677 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:15:49,677 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:15:49,677 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:15:49,677 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:15:49,678 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:15:49,678 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:15:49,679 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:15:49,679 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:15:49,679 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:15:49,679 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:15:49,680 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:15:49,680 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:15:49,680 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:15:49,680 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:15:49,681 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:15:49,681 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:15:49,682 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:15:49,682 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:15:49,682 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:15:49,682 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:15:49,682 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:15:49,682 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:15:49,682 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:15:49,683 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:15:49,683 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:15:49,683 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:15:49,683 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:15:49,683 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:15:49,683 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:15:49,684 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:15:49,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:15:49,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:15:49,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:15:49,906 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:15:49,906 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:15:49,907 INFO L431 ainManager$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/popl20-prod-cons.wvr.yml/witness.yml [2024-01-31 17:15:50,073 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:15:50,074 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:15:50,075 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2024-01-31 17:15:51,073 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:15:51,209 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:15:51,209 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2024-01-31 17:15:51,215 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/590b9132c/62d78e8e493b4ce8a155f7bd30f32deb/FLAGd98de1519 [2024-01-31 17:15:51,227 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/590b9132c/62d78e8e493b4ce8a155f7bd30f32deb [2024-01-31 17:15:51,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:15:51,229 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:15:51,229 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:15:51,229 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:15:51,235 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:15:51,235 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:15:50" (1/2) ... [2024-01-31 17:15:51,236 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@461dc48 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:15:51, skipping insertion in model container [2024-01-31 17:15:51,236 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:15:50" (1/2) ... [2024-01-31 17:15:51,237 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@311de539 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:15:51, skipping insertion in model container [2024-01-31 17:15:51,237 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:15:51" (2/2) ... [2024-01-31 17:15:51,237 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@461dc48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:51, skipping insertion in model container [2024-01-31 17:15:51,238 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:15:51" (2/2) ... [2024-01-31 17:15:51,238 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:15:51,279 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 17:15:51,280 INFO L98 nessWitnessExtractor]: Location invariant after [L50-L50] (((1 <= w) && ((unsigned long )_argptr == 0UL)) && (w != 0)) && (v_assert == (_Bool)0 || v_assert == (_Bool)1) [2024-01-31 17:15:51,280 INFO L98 nessWitnessExtractor]: Location invariant after [L68-L68] ((unsigned long )_argptr == 0UL) && (v_assert == (_Bool)0 || v_assert == (_Bool)1) [2024-01-31 17:15:51,297 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:15:51,424 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/popl20-prod-cons.wvr.c[3095,3108] [2024-01-31 17:15:51,443 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:15:51,468 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:15:51,500 WARN L424 MainDispatcher]: Unable to annotate _Bool with a witness entry [2024-01-31 17:15:51,502 WARN L424 MainDispatcher]: Unable to annotate _Bool with a witness entry [2024-01-31 17:15:51,506 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/popl20-prod-cons.wvr.c[3095,3108] [2024-01-31 17:15:51,509 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:15:51,521 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:15:51,522 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:51 WrapperNode [2024-01-31 17:15:51,522 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:15:51,523 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:15:51,523 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:15:51,523 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:15:51,529 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:51" (1/1) ... [2024-01-31 17:15:51,538 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:51" (1/1) ... [2024-01-31 17:15:51,560 INFO L138 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 173 [2024-01-31 17:15:51,561 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:15:51,561 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:15:51,562 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:15:51,562 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:15:51,575 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:51" (1/1) ... [2024-01-31 17:15:51,575 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:51" (1/1) ... [2024-01-31 17:15:51,585 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:51" (1/1) ... [2024-01-31 17:15:51,601 INFO L175 MemorySlicer]: Split 11 memory accesses to 5 slices as follows [2, 3, 2, 2, 2]. 27 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-01-31 17:15:51,607 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:51" (1/1) ... [2024-01-31 17:15:51,608 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:51" (1/1) ... [2024-01-31 17:15:51,613 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:51" (1/1) ... [2024-01-31 17:15:51,622 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:51" (1/1) ... [2024-01-31 17:15:51,623 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:51" (1/1) ... [2024-01-31 17:15:51,624 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:51" (1/1) ... [2024-01-31 17:15:51,626 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:15:51,627 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:15:51,627 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:15:51,627 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:15:51,628 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:51" (1/1) ... [2024-01-31 17:15:51,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:15:51,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:51,650 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 17:15:51,657 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 17:15:51,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:15:51,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:15:51,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:15:51,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:15:51,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:15:51,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 17:15:51,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-31 17:15:51,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:15:51,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:15:51,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:15:51,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 17:15:51,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-31 17:15:51,681 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:15:51,681 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:15:51,681 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:15:51,681 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:15:51,681 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-31 17:15:51,681 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-31 17:15:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:15:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:15:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:15:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 17:15:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-31 17:15:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:15:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:15:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 17:15:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:15:51,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:15:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:15:51,683 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 17:15:51,786 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:15:51,787 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:15:51,996 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:15:51,998 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:15:52,217 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:15:52,217 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 17:15:52,219 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:15:52 BoogieIcfgContainer [2024-01-31 17:15:52,219 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:15:52,221 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:15:52,221 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:15:52,223 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:15:52,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:15:50" (1/4) ... [2024-01-31 17:15:52,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de5966c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:15:52, skipping insertion in model container [2024-01-31 17:15:52,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:15:51" (2/4) ... [2024-01-31 17:15:52,225 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de5966c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:15:52, skipping insertion in model container [2024-01-31 17:15:52,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:51" (3/4) ... [2024-01-31 17:15:52,225 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de5966c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:15:52, skipping insertion in model container [2024-01-31 17:15:52,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:15:52" (4/4) ... [2024-01-31 17:15:52,227 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2024-01-31 17:15:52,240 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:15:52,241 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:15:52,241 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:15:52,279 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-31 17:15:52,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 39 transitions, 99 flow [2024-01-31 17:15:52,346 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2024-01-31 17:15:52,346 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 17:15:52,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 36 events. 4/36 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 60 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-01-31 17:15:52,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 39 transitions, 99 flow [2024-01-31 17:15:52,352 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 35 transitions, 88 flow [2024-01-31 17:15:52,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:15:52,371 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;@53326417, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:15:52,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-31 17:15:52,387 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:15:52,388 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2024-01-31 17:15:52,388 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 17:15:52,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:52,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:52,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:15:52,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:52,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1956098430, now seen corresponding path program 1 times [2024-01-31 17:15:52,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:52,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865319656] [2024-01-31 17:15:52,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:52,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:52,906 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 17:15:52,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:52,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865319656] [2024-01-31 17:15:52,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865319656] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:15:52,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:15:52,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:15:52,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776047796] [2024-01-31 17:15:52,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:15:52,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:15:52,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:52,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:15:52,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:15:52,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-01-31 17:15:52,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 88 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 17:15:52,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:52,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-01-31 17:15:52,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:53,279 INFO L124 PetriNetUnfolderBase]: 865/1410 cut-off events. [2024-01-31 17:15:53,279 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2024-01-31 17:15:53,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2828 conditions, 1410 events. 865/1410 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6809 event pairs, 151 based on Foata normal form. 92/1484 useless extension candidates. Maximal degree in co-relation 2448. Up to 433 conditions per place. [2024-01-31 17:15:53,291 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 61 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2024-01-31 17:15:53,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 73 transitions, 311 flow [2024-01-31 17:15:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:15:53,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:15:53,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-01-31 17:15:53,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470085470085471 [2024-01-31 17:15:53,304 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 88 flow. Second operand 6 states and 128 transitions. [2024-01-31 17:15:53,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 73 transitions, 311 flow [2024-01-31 17:15:53,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 73 transitions, 289 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-31 17:15:53,314 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 102 flow [2024-01-31 17:15:53,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-01-31 17:15:53,319 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2024-01-31 17:15:53,319 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 102 flow [2024-01-31 17:15:53,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 17:15:53,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:53,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:53,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:15:53,320 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:15:53,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:53,321 INFO L85 PathProgramCache]: Analyzing trace with hash 359614103, now seen corresponding path program 1 times [2024-01-31 17:15:53,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:53,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994087061] [2024-01-31 17:15:53,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:53,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:53,423 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 17:15:53,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:53,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994087061] [2024-01-31 17:15:53,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994087061] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:15:53,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:15:53,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:15:53,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358491195] [2024-01-31 17:15:53,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:15:53,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:15:53,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:53,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:15:53,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:15:53,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-01-31 17:15:53,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:53,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:53,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-01-31 17:15:53,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:53,513 INFO L124 PetriNetUnfolderBase]: 425/845 cut-off events. [2024-01-31 17:15:53,514 INFO L125 PetriNetUnfolderBase]: For 178/247 co-relation queries the response was YES. [2024-01-31 17:15:53,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1662 conditions, 845 events. 425/845 cut-off events. For 178/247 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4267 event pairs, 181 based on Foata normal form. 71/863 useless extension candidates. Maximal degree in co-relation 731. Up to 479 conditions per place. [2024-01-31 17:15:53,521 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 29 selfloop transitions, 2 changer transitions 5/49 dead transitions. [2024-01-31 17:15:53,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 201 flow [2024-01-31 17:15:53,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:15:53,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:15:53,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-01-31 17:15:53,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6752136752136753 [2024-01-31 17:15:53,527 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 102 flow. Second operand 3 states and 79 transitions. [2024-01-31 17:15:53,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 201 flow [2024-01-31 17:15:53,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 195 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-31 17:15:53,529 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 108 flow [2024-01-31 17:15:53,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2024-01-31 17:15:53,530 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2024-01-31 17:15:53,530 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 108 flow [2024-01-31 17:15:53,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:53,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:53,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:53,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:15:53,530 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:15:53,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:53,531 INFO L85 PathProgramCache]: Analyzing trace with hash 616657969, now seen corresponding path program 1 times [2024-01-31 17:15:53,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:53,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443475702] [2024-01-31 17:15:53,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:53,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:15:53,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:53,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443475702] [2024-01-31 17:15:53,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443475702] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:15:53,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:15:53,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:15:53,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139509894] [2024-01-31 17:15:53,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:15:53,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:15:53,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:53,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:15:53,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:15:53,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-01-31 17:15:53,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 17:15:53,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:53,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-01-31 17:15:53,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:53,779 INFO L124 PetriNetUnfolderBase]: 492/987 cut-off events. [2024-01-31 17:15:53,779 INFO L125 PetriNetUnfolderBase]: For 319/445 co-relation queries the response was YES. [2024-01-31 17:15:53,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2025 conditions, 987 events. 492/987 cut-off events. For 319/445 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5467 event pairs, 416 based on Foata normal form. 94/962 useless extension candidates. Maximal degree in co-relation 1249. Up to 621 conditions per place. [2024-01-31 17:15:53,784 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 24 selfloop transitions, 2 changer transitions 14/53 dead transitions. [2024-01-31 17:15:53,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 53 transitions, 222 flow [2024-01-31 17:15:53,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:15:53,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:15:53,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-01-31 17:15:53,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-01-31 17:15:53,788 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 108 flow. Second operand 4 states and 96 transitions. [2024-01-31 17:15:53,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 53 transitions, 222 flow [2024-01-31 17:15:53,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:15:53,791 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 120 flow [2024-01-31 17:15:53,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-01-31 17:15:53,792 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 5 predicate places. [2024-01-31 17:15:53,792 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 120 flow [2024-01-31 17:15:53,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 17:15:53,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:53,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:53,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:15:53,793 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:15:53,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:53,793 INFO L85 PathProgramCache]: Analyzing trace with hash -621043479, now seen corresponding path program 1 times [2024-01-31 17:15:53,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:53,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732587819] [2024-01-31 17:15:53,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:53,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:54,355 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 17:15:54,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:54,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732587819] [2024-01-31 17:15:54,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732587819] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:54,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575533237] [2024-01-31 17:15:54,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:54,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:54,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:54,357 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 17:15:54,384 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 17:15:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:54,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-31 17:15:54,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:54,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:15:54,961 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 17:15:54,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:55,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2024-01-31 17:15:55,520 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:15:55,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 50 treesize of output 46 [2024-01-31 17:15:55,625 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 17:15:55,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575533237] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:55,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:55,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2024-01-31 17:15:55,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393696666] [2024-01-31 17:15:55,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:55,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-31 17:15:55,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:55,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-31 17:15:55,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2024-01-31 17:15:55,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2024-01-31 17:15:55,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 120 flow. Second operand has 32 states, 32 states have (on average 8.875) internal successors, (284), 32 states have internal predecessors, (284), 0 states have call successors, (0), 0 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 17:15:55,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:55,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2024-01-31 17:15:55,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:57,987 INFO L124 PetriNetUnfolderBase]: 4678/7466 cut-off events. [2024-01-31 17:15:57,987 INFO L125 PetriNetUnfolderBase]: For 2352/2352 co-relation queries the response was YES. [2024-01-31 17:15:57,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17080 conditions, 7466 events. 4678/7466 cut-off events. For 2352/2352 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 43370 event pairs, 486 based on Foata normal form. 120/7134 useless extension candidates. Maximal degree in co-relation 17064. Up to 1448 conditions per place. [2024-01-31 17:15:58,006 INFO L140 encePairwiseOnDemand]: 22/39 looper letters, 217 selfloop transitions, 78 changer transitions 71/369 dead transitions. [2024-01-31 17:15:58,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 369 transitions, 1773 flow [2024-01-31 17:15:58,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-31 17:15:58,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-31 17:15:58,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 575 transitions. [2024-01-31 17:15:58,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42124542124542125 [2024-01-31 17:15:58,008 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 120 flow. Second operand 35 states and 575 transitions. [2024-01-31 17:15:58,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 369 transitions, 1773 flow [2024-01-31 17:15:58,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 369 transitions, 1757 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-01-31 17:15:58,015 INFO L231 Difference]: Finished difference. Result has 96 places, 121 transitions, 712 flow [2024-01-31 17:15:58,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=712, PETRI_PLACES=96, PETRI_TRANSITIONS=121} [2024-01-31 17:15:58,016 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-01-31 17:15:58,016 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 121 transitions, 712 flow [2024-01-31 17:15:58,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 8.875) internal successors, (284), 32 states have internal predecessors, (284), 0 states have call successors, (0), 0 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 17:15:58,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:58,016 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:58,028 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 17:15:58,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:58,229 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:15:58,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:58,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1681679297, now seen corresponding path program 2 times [2024-01-31 17:15:58,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:58,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038751458] [2024-01-31 17:15:58,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:58,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:58,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:58,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038751458] [2024-01-31 17:15:58,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038751458] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:58,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225131753] [2024-01-31 17:15:58,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:15:58,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:58,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:58,855 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 17:15:58,856 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 17:15:58,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:15:58,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:58,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-31 17:15:58,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:15:59,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:59,270 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:15:59,271 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 28 treesize of output 20 [2024-01-31 17:15:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:15:59,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225131753] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:59,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:59,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2024-01-31 17:15:59,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712369205] [2024-01-31 17:15:59,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:59,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-31 17:15:59,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:59,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-31 17:15:59,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2024-01-31 17:15:59,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 39 [2024-01-31 17:15:59,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 121 transitions, 712 flow. Second operand has 32 states, 32 states have (on average 7.8125) internal successors, (250), 32 states have internal predecessors, (250), 0 states have call successors, (0), 0 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 17:15:59,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:59,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 39 [2024-01-31 17:15:59,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:16:02,004 INFO L124 PetriNetUnfolderBase]: 4356/6680 cut-off events. [2024-01-31 17:16:02,004 INFO L125 PetriNetUnfolderBase]: For 11978/11978 co-relation queries the response was YES. [2024-01-31 17:16:02,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21293 conditions, 6680 events. 4356/6680 cut-off events. For 11978/11978 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 33354 event pairs, 123 based on Foata normal form. 116/6794 useless extension candidates. Maximal degree in co-relation 20258. Up to 1482 conditions per place. [2024-01-31 17:16:02,038 INFO L140 encePairwiseOnDemand]: 21/39 looper letters, 324 selfloop transitions, 184 changer transitions 85/595 dead transitions. [2024-01-31 17:16:02,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 595 transitions, 3822 flow [2024-01-31 17:16:02,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-01-31 17:16:02,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2024-01-31 17:16:02,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 744 transitions. [2024-01-31 17:16:02,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34685314685314683 [2024-01-31 17:16:02,041 INFO L175 Difference]: Start difference. First operand has 96 places, 121 transitions, 712 flow. Second operand 55 states and 744 transitions. [2024-01-31 17:16:02,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 595 transitions, 3822 flow [2024-01-31 17:16:02,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 595 transitions, 3707 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-01-31 17:16:02,113 INFO L231 Difference]: Finished difference. Result has 173 places, 229 transitions, 1950 flow [2024-01-31 17:16:02,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1950, PETRI_PLACES=173, PETRI_TRANSITIONS=229} [2024-01-31 17:16:02,115 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-01-31 17:16:02,115 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 229 transitions, 1950 flow [2024-01-31 17:16:02,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 7.8125) internal successors, (250), 32 states have internal predecessors, (250), 0 states have call successors, (0), 0 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 17:16:02,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:16:02,116 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:16:02,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 17:16:02,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:02,324 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:16:02,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:16:02,325 INFO L85 PathProgramCache]: Analyzing trace with hash 315982488, now seen corresponding path program 3 times [2024-01-31 17:16:02,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:16:02,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070420492] [2024-01-31 17:16:02,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:16:02,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:16:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:16:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:16:02,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:16:02,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070420492] [2024-01-31 17:16:02,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070420492] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:16:02,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731450357] [2024-01-31 17:16:02,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:16:02,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:02,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:16:02,384 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 17:16:02,404 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 17:16:02,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:16:02,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:16:02,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:16:02,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:16:02,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:16:02,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:16:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:16:02,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731450357] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:16:02,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:16:02,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 10 [2024-01-31 17:16:02,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291837056] [2024-01-31 17:16:02,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:16:02,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 17:16:02,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:16:02,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 17:16:02,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-01-31 17:16:02,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-01-31 17:16:02,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 229 transitions, 1950 flow. Second operand has 11 states, 11 states have (on average 18.454545454545453) internal successors, (203), 11 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:16:02,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:16:02,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-01-31 17:16:02,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:16:03,251 INFO L124 PetriNetUnfolderBase]: 2461/4801 cut-off events. [2024-01-31 17:16:03,252 INFO L125 PetriNetUnfolderBase]: For 27220/27572 co-relation queries the response was YES. [2024-01-31 17:16:03,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20910 conditions, 4801 events. 2461/4801 cut-off events. For 27220/27572 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 31152 event pairs, 324 based on Foata normal form. 204/4793 useless extension candidates. Maximal degree in co-relation 20278. Up to 1120 conditions per place. [2024-01-31 17:16:03,302 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 171 selfloop transitions, 20 changer transitions 111/386 dead transitions. [2024-01-31 17:16:03,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 386 transitions, 3474 flow [2024-01-31 17:16:03,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 17:16:03,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 17:16:03,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2024-01-31 17:16:03,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6386946386946387 [2024-01-31 17:16:03,304 INFO L175 Difference]: Start difference. First operand has 173 places, 229 transitions, 1950 flow. Second operand 11 states and 274 transitions. [2024-01-31 17:16:03,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 386 transitions, 3474 flow [2024-01-31 17:16:03,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 386 transitions, 3199 flow, removed 72 selfloop flow, removed 8 redundant places. [2024-01-31 17:16:03,384 INFO L231 Difference]: Finished difference. Result has 175 places, 193 transitions, 1537 flow [2024-01-31 17:16:03,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1537, PETRI_PLACES=175, PETRI_TRANSITIONS=193} [2024-01-31 17:16:03,385 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-01-31 17:16:03,385 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 193 transitions, 1537 flow [2024-01-31 17:16:03,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.454545454545453) internal successors, (203), 11 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:16:03,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:16:03,386 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:16:03,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-01-31 17:16:03,596 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 17:16:03,597 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:16:03,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:16:03,597 INFO L85 PathProgramCache]: Analyzing trace with hash -165284732, now seen corresponding path program 4 times [2024-01-31 17:16:03,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:16:03,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646886805] [2024-01-31 17:16:03,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:16:03,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:16:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:16:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:04,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:16:04,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646886805] [2024-01-31 17:16:04,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646886805] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:16:04,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458951085] [2024-01-31 17:16:04,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:16:04,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:04,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:16:04,421 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 17:16:04,446 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 17:16:04,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:16:04,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:16:04,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-31 17:16:04,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:16:04,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:16:05,169 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-01-31 17:16:05,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2024-01-31 17:16:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:05,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:16:06,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 68 [2024-01-31 17:16:06,257 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-01-31 17:16:06,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 133 treesize of output 131 [2024-01-31 17:16:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:06,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458951085] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:16:06,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:16:06,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 46 [2024-01-31 17:16:06,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977444928] [2024-01-31 17:16:06,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:16:06,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-01-31 17:16:06,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:16:06,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-01-31 17:16:06,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1927, Unknown=0, NotChecked=0, Total=2162 [2024-01-31 17:16:07,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2024-01-31 17:16:07,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 193 transitions, 1537 flow. Second operand has 47 states, 47 states have (on average 8.553191489361701) internal successors, (402), 47 states have internal predecessors, (402), 0 states have call successors, (0), 0 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 17:16:07,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:16:07,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2024-01-31 17:16:07,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:16:25,174 INFO L124 PetriNetUnfolderBase]: 19309/30389 cut-off events. [2024-01-31 17:16:25,175 INFO L125 PetriNetUnfolderBase]: For 172336/172336 co-relation queries the response was YES. [2024-01-31 17:16:25,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134015 conditions, 30389 events. 19309/30389 cut-off events. For 172336/172336 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 200017 event pairs, 1652 based on Foata normal form. 502/30787 useless extension candidates. Maximal degree in co-relation 133948. Up to 4610 conditions per place. [2024-01-31 17:16:25,405 INFO L140 encePairwiseOnDemand]: 20/39 looper letters, 906 selfloop transitions, 498 changer transitions 388/1798 dead transitions. [2024-01-31 17:16:25,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 1798 transitions, 15671 flow [2024-01-31 17:16:25,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2024-01-31 17:16:25,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2024-01-31 17:16:25,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 2271 transitions. [2024-01-31 17:16:25,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3685491723466407 [2024-01-31 17:16:25,420 INFO L175 Difference]: Start difference. First operand has 175 places, 193 transitions, 1537 flow. Second operand 158 states and 2271 transitions. [2024-01-31 17:16:25,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 1798 transitions, 15671 flow [2024-01-31 17:16:25,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 1798 transitions, 14925 flow, removed 349 selfloop flow, removed 13 redundant places. [2024-01-31 17:16:25,955 INFO L231 Difference]: Finished difference. Result has 349 places, 593 transitions, 6720 flow [2024-01-31 17:16:25,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=158, PETRI_FLOW=6720, PETRI_PLACES=349, PETRI_TRANSITIONS=593} [2024-01-31 17:16:25,956 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2024-01-31 17:16:25,956 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 593 transitions, 6720 flow [2024-01-31 17:16:25,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 8.553191489361701) internal successors, (402), 47 states have internal predecessors, (402), 0 states have call successors, (0), 0 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 17:16:25,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:16:25,957 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:16:25,973 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 17:16:26,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:26,158 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:16:26,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:16:26,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1661499568, now seen corresponding path program 5 times [2024-01-31 17:16:26,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:16:26,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854994330] [2024-01-31 17:16:26,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:16:26,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:16:26,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:16:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:27,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:16:27,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854994330] [2024-01-31 17:16:27,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854994330] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:16:27,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841752060] [2024-01-31 17:16:27,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:16:27,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:27,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:16:27,029 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 17:16:27,030 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 17:16:27,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:16:27,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:16:27,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 17:16:27,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:16:27,895 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2024-01-31 17:16:27,895 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 46 treesize of output 19 [2024-01-31 17:16:28,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:28,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:16:28,540 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-01-31 17:16:28,541 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 50 treesize of output 53 [2024-01-31 17:16:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:29,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841752060] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:16:29,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:16:29,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 48 [2024-01-31 17:16:29,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173102130] [2024-01-31 17:16:29,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:16:29,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-01-31 17:16:29,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:16:29,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-01-31 17:16:29,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=2077, Unknown=0, NotChecked=0, Total=2352 [2024-01-31 17:16:29,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-01-31 17:16:29,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 593 transitions, 6720 flow. Second operand has 49 states, 49 states have (on average 10.122448979591837) internal successors, (496), 49 states have internal predecessors, (496), 0 states have call successors, (0), 0 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 17:16:29,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:16:29,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-01-31 17:16:29,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:16:43,515 INFO L124 PetriNetUnfolderBase]: 18943/30460 cut-off events. [2024-01-31 17:16:43,516 INFO L125 PetriNetUnfolderBase]: For 435534/435956 co-relation queries the response was YES. [2024-01-31 17:16:43,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178664 conditions, 30460 events. 18943/30460 cut-off events. For 435534/435956 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 209368 event pairs, 1690 based on Foata normal form. 294/30322 useless extension candidates. Maximal degree in co-relation 174640. Up to 8710 conditions per place. [2024-01-31 17:16:43,861 INFO L140 encePairwiseOnDemand]: 22/39 looper letters, 893 selfloop transitions, 709 changer transitions 181/1837 dead transitions. [2024-01-31 17:16:43,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 1837 transitions, 21991 flow [2024-01-31 17:16:43,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-01-31 17:16:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2024-01-31 17:16:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 1740 transitions. [2024-01-31 17:16:43,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131054131054131 [2024-01-31 17:16:43,864 INFO L175 Difference]: Start difference. First operand has 349 places, 593 transitions, 6720 flow. Second operand 108 states and 1740 transitions. [2024-01-31 17:16:43,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 1837 transitions, 21991 flow [2024-01-31 17:16:48,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 1837 transitions, 20133 flow, removed 723 selfloop flow, removed 29 redundant places. [2024-01-31 17:16:48,739 INFO L231 Difference]: Finished difference. Result has 449 places, 1006 transitions, 12601 flow [2024-01-31 17:16:48,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5805, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=12601, PETRI_PLACES=449, PETRI_TRANSITIONS=1006} [2024-01-31 17:16:48,740 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 408 predicate places. [2024-01-31 17:16:48,740 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 1006 transitions, 12601 flow [2024-01-31 17:16:48,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 10.122448979591837) internal successors, (496), 49 states have internal predecessors, (496), 0 states have call successors, (0), 0 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 17:16:48,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:16:48,741 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:16:48,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-31 17:16:48,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:48,943 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:16:48,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:16:48,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1810184172, now seen corresponding path program 6 times [2024-01-31 17:16:48,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:16:48,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835862430] [2024-01-31 17:16:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:16:48,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:16:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:16:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:49,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:16:49,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835862430] [2024-01-31 17:16:49,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835862430] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:16:49,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062508515] [2024-01-31 17:16:49,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:16:49,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:49,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:16:49,824 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 17:16:49,825 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 17:16:49,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:16:49,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:16:49,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 42 conjunts are in the unsatisfiable core [2024-01-31 17:16:49,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:16:50,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:50,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:16:51,210 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2024-01-31 17:16:51,210 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 51 treesize of output 43 [2024-01-31 17:16:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:51,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062508515] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:16:51,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:16:51,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 48 [2024-01-31 17:16:51,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969540626] [2024-01-31 17:16:51,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:16:51,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-01-31 17:16:51,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:16:51,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-01-31 17:16:51,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=2066, Unknown=0, NotChecked=0, Total=2352 [2024-01-31 17:16:51,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 39 [2024-01-31 17:16:51,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 1006 transitions, 12601 flow. Second operand has 49 states, 49 states have (on average 7.387755102040816) internal successors, (362), 49 states have internal predecessors, (362), 0 states have call successors, (0), 0 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 17:16:51,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:16:51,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 39 [2024-01-31 17:16:51,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:31,671 INFO L124 PetriNetUnfolderBase]: 61026/93141 cut-off events. [2024-01-31 17:17:31,671 INFO L125 PetriNetUnfolderBase]: For 1415863/1415863 co-relation queries the response was YES. [2024-01-31 17:17:33,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565302 conditions, 93141 events. 61026/93141 cut-off events. For 1415863/1415863 co-relation queries the response was YES. Maximal size of possible extension queue 2043. Compared 687087 event pairs, 5336 based on Foata normal form. 1096/94237 useless extension candidates. Maximal degree in co-relation 564795. Up to 15227 conditions per place. [2024-01-31 17:17:33,334 INFO L140 encePairwiseOnDemand]: 18/39 looper letters, 1524 selfloop transitions, 1901 changer transitions 751/4178 dead transitions. [2024-01-31 17:17:33,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 4178 transitions, 54287 flow [2024-01-31 17:17:33,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2024-01-31 17:17:33,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2024-01-31 17:17:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 3080 transitions. [2024-01-31 17:17:33,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34790466508528184 [2024-01-31 17:17:33,339 INFO L175 Difference]: Start difference. First operand has 449 places, 1006 transitions, 12601 flow. Second operand 227 states and 3080 transitions. [2024-01-31 17:17:33,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 675 places, 4178 transitions, 54287 flow