./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-counter-determinism.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-counter-determinism.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 958ec4d9 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-counter-determinism.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-counter-determinism.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-958ec4d-m [2024-02-07 14:38:00,129 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:38:00,194 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:38:00,199 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:38:00,199 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:38:00,223 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:38:00,223 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:38:00,224 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:38:00,224 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:38:00,227 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:38:00,228 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:38:00,228 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:38:00,228 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:38:00,229 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:38:00,230 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:38:00,230 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:38:00,230 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:38:00,230 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:38:00,230 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:38:00,231 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:38:00,232 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:38:00,232 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:38:00,232 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:38:00,232 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:38:00,233 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:38:00,233 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:38:00,233 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:38:00,233 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:38:00,234 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:38:00,234 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:38:00,235 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:38:00,235 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:38:00,235 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:38:00,235 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:38:00,236 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:38:00,236 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:38:00,236 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:38:00,236 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:38:00,236 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:38:00,236 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:38:00,237 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:38:00,237 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:38:00,237 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:38:00,237 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:38:00,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:38:00,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:38:00,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:38:00,459 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:38:00,459 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:38:00,460 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-counter-determinism.wvr.yml/witness.yml [2024-02-07 14:38:00,551 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:38:00,551 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:38:00,553 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-determinism.wvr.c [2024-02-07 14:38:01,587 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:38:01,742 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:38:01,743 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-determinism.wvr.c [2024-02-07 14:38:01,749 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7d1a9198/ff2139a4672641dcaa851118a2a20938/FLAG6ac61ee8a [2024-02-07 14:38:01,762 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7d1a9198/ff2139a4672641dcaa851118a2a20938 [2024-02-07 14:38:01,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:38:01,763 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:38:01,765 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:38:01,766 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:38:01,769 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:38:01,769 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:38:00" (1/2) ... [2024-02-07 14:38:01,770 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f9adcab and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:01, skipping insertion in model container [2024-02-07 14:38:01,770 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:38:00" (1/2) ... [2024-02-07 14:38:01,771 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@77b772bd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:01, skipping insertion in model container [2024-02-07 14:38:01,772 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:38:01" (2/2) ... [2024-02-07 14:38:01,772 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f9adcab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:01, skipping insertion in model container [2024-02-07 14:38:01,772 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:38:01" (2/2) ... [2024-02-07 14:38:01,772 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:38:01,787 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:38:01,788 INFO L76 edCorrectnessWitness]: Location invariant before [L55-L55] counter1 <= 2147483646 [2024-02-07 14:38:01,788 INFO L76 edCorrectnessWitness]: Location invariant before [L65-L65] -2147483647 <= counter2 [2024-02-07 14:38:01,788 INFO L76 edCorrectnessWitness]: Location invariant before [L76-L76] counter2 <= 2147483646 [2024-02-07 14:38:01,788 INFO L76 edCorrectnessWitness]: Location invariant before [L44-L44] -2147483647 <= counter1 [2024-02-07 14:38:01,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:38:01,973 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-counter-determinism.wvr.c[2528,2541] [2024-02-07 14:38:01,976 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:38:01,988 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 14:38:02,030 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-counter-determinism.wvr.c[2528,2541] [2024-02-07 14:38:02,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:38:02,042 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:38:02,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:02 WrapperNode [2024-02-07 14:38:02,043 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:38:02,044 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:38:02,044 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:38:02,044 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:38:02,049 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:02" (1/1) ... [2024-02-07 14:38:02,054 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:02" (1/1) ... [2024-02-07 14:38:02,068 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 122 [2024-02-07 14:38:02,069 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:38:02,069 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:38:02,069 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:38:02,070 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:38:02,078 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:02" (1/1) ... [2024-02-07 14:38:02,078 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:02" (1/1) ... [2024-02-07 14:38:02,080 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:02" (1/1) ... [2024-02-07 14:38:02,093 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-02-07 14:38:02,093 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:02" (1/1) ... [2024-02-07 14:38:02,094 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:02" (1/1) ... [2024-02-07 14:38:02,099 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:02" (1/1) ... [2024-02-07 14:38:02,102 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:02" (1/1) ... [2024-02-07 14:38:02,103 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:02" (1/1) ... [2024-02-07 14:38:02,104 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:02" (1/1) ... [2024-02-07 14:38:02,107 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:38:02,108 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:38:02,108 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:38:02,108 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:38:02,108 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:02" (1/1) ... [2024-02-07 14:38:02,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:38:02,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:02,129 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-07 14:38:02,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-07 14:38:02,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:38:02,156 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 14:38:02,156 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 14:38:02,156 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 14:38:02,156 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 14:38:02,157 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-07 14:38:02,157 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-07 14:38:02,157 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-02-07 14:38:02,157 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-02-07 14:38:02,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:38:02,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:38:02,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:38:02,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 14:38:02,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-07 14:38:02,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:38:02,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:38:02,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:38:02,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:38:02,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 14:38:02,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-07 14:38:02,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 14:38:02,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 14:38:02,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:38:02,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:38:02,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:38:02,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:38:02,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:38:02,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 14:38:02,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-07 14:38:02,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:38:02,161 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 14:38:02,243 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:38:02,244 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:38:02,408 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:38:02,409 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:38:02,514 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:38:02,515 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-02-07 14:38:02,515 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:38:02 BoogieIcfgContainer [2024-02-07 14:38:02,515 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:38:02,517 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:38:02,517 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:38:02,519 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:38:02,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:38:00" (1/4) ... [2024-02-07 14:38:02,520 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ccfa416 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:38:02, skipping insertion in model container [2024-02-07 14:38:02,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:38:01" (2/4) ... [2024-02-07 14:38:02,520 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ccfa416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:38:02, skipping insertion in model container [2024-02-07 14:38:02,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:02" (3/4) ... [2024-02-07 14:38:02,521 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ccfa416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:38:02, skipping insertion in model container [2024-02-07 14:38:02,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:38:02" (4/4) ... [2024-02-07 14:38:02,522 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-determinism.wvr.c [2024-02-07 14:38:02,535 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:38:02,535 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-02-07 14:38:02,535 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:38:02,581 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-02-07 14:38:02,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 122 flow [2024-02-07 14:38:02,625 INFO L124 PetriNetUnfolderBase]: 4/43 cut-off events. [2024-02-07 14:38:02,625 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-07 14:38:02,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 43 events. 4/43 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 63 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-02-07 14:38:02,628 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 122 flow [2024-02-07 14:38:02,630 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 42 transitions, 108 flow [2024-02-07 14:38:02,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:38:02,642 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;@6a0f4a55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:38:02,642 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-02-07 14:38:02,645 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:38:02,645 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-02-07 14:38:02,646 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:38:02,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:02,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:38:02,647 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 14:38:02,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:02,651 INFO L85 PathProgramCache]: Analyzing trace with hash 375017074, now seen corresponding path program 1 times [2024-02-07 14:38:02,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:02,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696602428] [2024-02-07 14:38:02,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:02,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:02,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:02,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696602428] [2024-02-07 14:38:02,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696602428] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:02,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:02,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:38:02,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128901271] [2024-02-07 14:38:02,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:02,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:38:02,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:02,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:38:02,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:38:02,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:38:02,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:02,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:02,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:38:02,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:03,709 INFO L124 PetriNetUnfolderBase]: 7260/9846 cut-off events. [2024-02-07 14:38:03,709 INFO L125 PetriNetUnfolderBase]: For 530/530 co-relation queries the response was YES. [2024-02-07 14:38:03,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20075 conditions, 9846 events. 7260/9846 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 50817 event pairs, 2216 based on Foata normal form. 233/8572 useless extension candidates. Maximal degree in co-relation 17681. Up to 6797 conditions per place. [2024-02-07 14:38:03,778 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 64 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2024-02-07 14:38:03,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 71 transitions, 319 flow [2024-02-07 14:38:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:38:03,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:38:03,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-02-07 14:38:03,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6808510638297872 [2024-02-07 14:38:03,790 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 108 flow. Second operand 3 states and 96 transitions. [2024-02-07 14:38:03,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 71 transitions, 319 flow [2024-02-07 14:38:03,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 71 transitions, 289 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-02-07 14:38:03,813 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 108 flow [2024-02-07 14:38:03,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-02-07 14:38:03,819 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2024-02-07 14:38:03,819 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 108 flow [2024-02-07 14:38:03,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:03,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:03,820 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:03,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:38:03,821 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 14:38:03,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:03,823 INFO L85 PathProgramCache]: Analyzing trace with hash 924114692, now seen corresponding path program 1 times [2024-02-07 14:38:03,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:03,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301929182] [2024-02-07 14:38:03,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:03,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:03,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:03,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301929182] [2024-02-07 14:38:03,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301929182] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:03,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:03,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:38:03,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783685288] [2024-02-07 14:38:03,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:03,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:38:03,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:03,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:38:03,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:38:03,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:38:03,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:03,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:03,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:38:03,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:04,411 INFO L124 PetriNetUnfolderBase]: 6213/8407 cut-off events. [2024-02-07 14:38:04,413 INFO L125 PetriNetUnfolderBase]: For 776/776 co-relation queries the response was YES. [2024-02-07 14:38:04,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17961 conditions, 8407 events. 6213/8407 cut-off events. For 776/776 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 42005 event pairs, 4933 based on Foata normal form. 0/7293 useless extension candidates. Maximal degree in co-relation 11470. Up to 8238 conditions per place. [2024-02-07 14:38:04,448 INFO L140 encePairwiseOnDemand]: 45/47 looper letters, 36 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2024-02-07 14:38:04,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 42 transitions, 178 flow [2024-02-07 14:38:04,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:38:04,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:38:04,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-02-07 14:38:04,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45390070921985815 [2024-02-07 14:38:04,455 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 108 flow. Second operand 3 states and 64 transitions. [2024-02-07 14:38:04,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 42 transitions, 178 flow [2024-02-07 14:38:04,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 42 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:38:04,457 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 104 flow [2024-02-07 14:38:04,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2024-02-07 14:38:04,458 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2024-02-07 14:38:04,458 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 104 flow [2024-02-07 14:38:04,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:04,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:04,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:04,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:38:04,459 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 14:38:04,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:04,461 INFO L85 PathProgramCache]: Analyzing trace with hash 103356901, now seen corresponding path program 1 times [2024-02-07 14:38:04,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:04,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106665951] [2024-02-07 14:38:04,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:04,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:04,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:04,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106665951] [2024-02-07 14:38:04,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106665951] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:04,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:04,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:38:04,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229459183] [2024-02-07 14:38:04,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:04,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:38:04,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:04,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:38:04,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:38:04,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:38:04,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:04,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:04,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:38:04,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:05,169 INFO L124 PetriNetUnfolderBase]: 7157/9941 cut-off events. [2024-02-07 14:38:05,169 INFO L125 PetriNetUnfolderBase]: For 1104/1104 co-relation queries the response was YES. [2024-02-07 14:38:05,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20868 conditions, 9941 events. 7157/9941 cut-off events. For 1104/1104 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 49993 event pairs, 2201 based on Foata normal form. 136/9107 useless extension candidates. Maximal degree in co-relation 20860. Up to 6721 conditions per place. [2024-02-07 14:38:05,215 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 60 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-02-07 14:38:05,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 291 flow [2024-02-07 14:38:05,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:38:05,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:38:05,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-02-07 14:38:05,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-02-07 14:38:05,218 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 104 flow. Second operand 3 states and 90 transitions. [2024-02-07 14:38:05,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 291 flow [2024-02-07 14:38:05,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:38:05,220 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 119 flow [2024-02-07 14:38:05,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-02-07 14:38:05,221 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2024-02-07 14:38:05,221 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 119 flow [2024-02-07 14:38:05,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:05,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:05,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:05,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:38:05,222 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 14:38:05,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:05,223 INFO L85 PathProgramCache]: Analyzing trace with hash -338783630, now seen corresponding path program 1 times [2024-02-07 14:38:05,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:05,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119967941] [2024-02-07 14:38:05,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:05,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:05,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:05,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119967941] [2024-02-07 14:38:05,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119967941] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:05,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:05,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:38:05,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465302305] [2024-02-07 14:38:05,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:05,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:38:05,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:05,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:38:05,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:38:05,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:38:05,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:05,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:05,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:38:05,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:06,305 INFO L124 PetriNetUnfolderBase]: 13410/18878 cut-off events. [2024-02-07 14:38:06,305 INFO L125 PetriNetUnfolderBase]: For 3550/3550 co-relation queries the response was YES. [2024-02-07 14:38:06,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42601 conditions, 18878 events. 13410/18878 cut-off events. For 3550/3550 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 110687 event pairs, 4461 based on Foata normal form. 280/17591 useless extension candidates. Maximal degree in co-relation 42591. Up to 6754 conditions per place. [2024-02-07 14:38:06,371 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 98 selfloop transitions, 5 changer transitions 0/108 dead transitions. [2024-02-07 14:38:06,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 108 transitions, 497 flow [2024-02-07 14:38:06,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:38:06,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:38:06,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-02-07 14:38:06,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7340425531914894 [2024-02-07 14:38:06,375 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 119 flow. Second operand 4 states and 138 transitions. [2024-02-07 14:38:06,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 108 transitions, 497 flow [2024-02-07 14:38:06,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 108 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:38:06,379 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 157 flow [2024-02-07 14:38:06,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-02-07 14:38:06,380 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2024-02-07 14:38:06,381 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 157 flow [2024-02-07 14:38:06,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:06,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:06,382 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:06,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 14:38:06,382 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 14:38:06,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:06,382 INFO L85 PathProgramCache]: Analyzing trace with hash -385701571, now seen corresponding path program 1 times [2024-02-07 14:38:06,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:06,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381946482] [2024-02-07 14:38:06,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:06,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:06,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:06,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381946482] [2024-02-07 14:38:06,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381946482] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:06,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:06,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:38:06,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348010971] [2024-02-07 14:38:06,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:06,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:38:06,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:06,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:38:06,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:38:06,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:38:06,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:06,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:06,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:38:06,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:07,259 INFO L124 PetriNetUnfolderBase]: 11127/15651 cut-off events. [2024-02-07 14:38:07,259 INFO L125 PetriNetUnfolderBase]: For 8321/8321 co-relation queries the response was YES. [2024-02-07 14:38:07,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37505 conditions, 15651 events. 11127/15651 cut-off events. For 8321/8321 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 87987 event pairs, 9039 based on Foata normal form. 0/14924 useless extension candidates. Maximal degree in co-relation 37492. Up to 14928 conditions per place. [2024-02-07 14:38:07,343 INFO L140 encePairwiseOnDemand]: 45/47 looper letters, 39 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2024-02-07 14:38:07,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 45 transitions, 233 flow [2024-02-07 14:38:07,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:38:07,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:38:07,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2024-02-07 14:38:07,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44680851063829785 [2024-02-07 14:38:07,344 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 157 flow. Second operand 3 states and 63 transitions. [2024-02-07 14:38:07,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 45 transitions, 233 flow [2024-02-07 14:38:07,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 229 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-02-07 14:38:07,348 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 151 flow [2024-02-07 14:38:07,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-02-07 14:38:07,349 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2024-02-07 14:38:07,349 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 151 flow [2024-02-07 14:38:07,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:07,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:07,350 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:07,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:38:07,350 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 14:38:07,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:07,350 INFO L85 PathProgramCache]: Analyzing trace with hash 468308394, now seen corresponding path program 1 times [2024-02-07 14:38:07,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:07,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795682011] [2024-02-07 14:38:07,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:07,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:07,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:07,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795682011] [2024-02-07 14:38:07,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795682011] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:07,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395528872] [2024-02-07 14:38:07,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:07,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:07,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:07,397 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:38:07,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 14:38:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:07,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 14:38:07,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:07,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:07,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395528872] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:07,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:07,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-02-07 14:38:07,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971970457] [2024-02-07 14:38:07,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:07,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:38:07,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:07,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:38:07,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:38:07,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:38:07,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 151 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:07,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:07,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:38:07,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:09,654 INFO L124 PetriNetUnfolderBase]: 27909/39598 cut-off events. [2024-02-07 14:38:09,654 INFO L125 PetriNetUnfolderBase]: For 20900/20900 co-relation queries the response was YES. [2024-02-07 14:38:09,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92980 conditions, 39598 events. 27909/39598 cut-off events. For 20900/20900 co-relation queries the response was YES. Maximal size of possible extension queue 974. Compared 243512 event pairs, 5633 based on Foata normal form. 234/38584 useless extension candidates. Maximal degree in co-relation 92965. Up to 8538 conditions per place. [2024-02-07 14:38:09,832 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 215 selfloop transitions, 16 changer transitions 0/236 dead transitions. [2024-02-07 14:38:09,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 236 transitions, 1139 flow [2024-02-07 14:38:09,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:38:09,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:38:09,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 299 transitions. [2024-02-07 14:38:09,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7952127659574468 [2024-02-07 14:38:09,834 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 151 flow. Second operand 8 states and 299 transitions. [2024-02-07 14:38:09,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 236 transitions, 1139 flow [2024-02-07 14:38:09,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 236 transitions, 1138 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:38:09,839 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 303 flow [2024-02-07 14:38:09,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=303, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2024-02-07 14:38:09,840 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 14 predicate places. [2024-02-07 14:38:09,840 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 303 flow [2024-02-07 14:38:09,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:09,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:09,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:09,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-07 14:38:10,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-02-07 14:38:10,052 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread4Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 14:38:10,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:10,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1326683730, now seen corresponding path program 1 times [2024-02-07 14:38:10,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:10,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857408089] [2024-02-07 14:38:10,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:10,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:10,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:10,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857408089] [2024-02-07 14:38:10,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857408089] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:10,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:10,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:38:10,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477967614] [2024-02-07 14:38:10,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:10,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:38:10,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:10,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:38:10,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:38:10,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:38:10,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 303 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:10,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:10,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:38:10,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:14,246 INFO L124 PetriNetUnfolderBase]: 50340/71516 cut-off events. [2024-02-07 14:38:14,246 INFO L125 PetriNetUnfolderBase]: For 104804/104804 co-relation queries the response was YES. [2024-02-07 14:38:14,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181847 conditions, 71516 events. 50340/71516 cut-off events. For 104804/104804 co-relation queries the response was YES. Maximal size of possible extension queue 1718. Compared 468812 event pairs, 15607 based on Foata normal form. 968/71442 useless extension candidates. Maximal degree in co-relation 181825. Up to 24496 conditions per place. [2024-02-07 14:38:14,833 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 129 selfloop transitions, 5 changer transitions 0/139 dead transitions. [2024-02-07 14:38:14,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 139 transitions, 1079 flow [2024-02-07 14:38:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:38:14,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:38:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-02-07 14:38:14,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675531914893617 [2024-02-07 14:38:14,834 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 303 flow. Second operand 4 states and 127 transitions. [2024-02-07 14:38:14,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 139 transitions, 1079 flow [2024-02-07 14:38:14,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 139 transitions, 935 flow, removed 72 selfloop flow, removed 0 redundant places. [2024-02-07 14:38:14,968 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 295 flow [2024-02-07 14:38:14,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=295, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2024-02-07 14:38:14,969 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 19 predicate places. [2024-02-07 14:38:14,969 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 295 flow [2024-02-07 14:38:14,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:14,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:14,969 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:14,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 14:38:14,970 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread4Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 14:38:14,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:14,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1610566252, now seen corresponding path program 1 times [2024-02-07 14:38:14,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:14,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608966777] [2024-02-07 14:38:14,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:14,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:15,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:15,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608966777] [2024-02-07 14:38:15,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608966777] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:15,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357968868] [2024-02-07 14:38:15,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:15,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:15,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:15,028 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:38:15,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 14:38:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:15,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 14:38:15,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:15,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:15,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:15,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357968868] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:15,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:15,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-02-07 14:38:15,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270411556] [2024-02-07 14:38:15,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:15,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:38:15,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:15,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:38:15,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:38:15,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:38:15,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 295 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:15,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:15,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:38:15,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:26,275 INFO L124 PetriNetUnfolderBase]: 124578/178038 cut-off events. [2024-02-07 14:38:26,275 INFO L125 PetriNetUnfolderBase]: For 233004/233004 co-relation queries the response was YES. [2024-02-07 14:38:26,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455947 conditions, 178038 events. 124578/178038 cut-off events. For 233004/233004 co-relation queries the response was YES. Maximal size of possible extension queue 3277. Compared 1280735 event pairs, 22974 based on Foata normal form. 968/177964 useless extension candidates. Maximal degree in co-relation 455921. Up to 35667 conditions per place. [2024-02-07 14:38:27,329 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 289 selfloop transitions, 16 changer transitions 0/310 dead transitions. [2024-02-07 14:38:27,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 310 transitions, 2181 flow [2024-02-07 14:38:27,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:38:27,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:38:27,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 275 transitions. [2024-02-07 14:38:27,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7313829787234043 [2024-02-07 14:38:27,331 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 295 flow. Second operand 8 states and 275 transitions. [2024-02-07 14:38:27,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 310 transitions, 2181 flow [2024-02-07 14:38:27,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 310 transitions, 2177 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-02-07 14:38:27,656 INFO L231 Difference]: Finished difference. Result has 83 places, 70 transitions, 444 flow [2024-02-07 14:38:27,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=444, PETRI_PLACES=83, PETRI_TRANSITIONS=70} [2024-02-07 14:38:27,656 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 32 predicate places. [2024-02-07 14:38:27,657 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 70 transitions, 444 flow [2024-02-07 14:38:27,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:27,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:27,657 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:27,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-02-07 14:38:27,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-02-07 14:38:27,868 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 14:38:27,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:27,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2055002198, now seen corresponding path program 2 times [2024-02-07 14:38:27,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:27,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285459907] [2024-02-07 14:38:27,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:27,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:27,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:27,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:27,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285459907] [2024-02-07 14:38:27,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285459907] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:27,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147051916] [2024-02-07 14:38:27,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:38:27,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:27,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:27,969 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:38:27,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 14:38:28,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:38:28,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:38:28,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-07 14:38:28,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:28,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:28,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147051916] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:28,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:28,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-07 14:38:28,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383456084] [2024-02-07 14:38:28,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:28,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-07 14:38:28,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:28,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-07 14:38:28,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-02-07 14:38:28,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:38:28,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 70 transitions, 444 flow. Second operand has 17 states, 17 states have (on average 11.411764705882353) internal successors, (194), 17 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:28,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:28,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:38:28,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand