./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.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-proofs-counter-add-4-semi-Q67.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7c74aec 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-proofs-counter-add-4-semi-Q67.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-proofs-counter-add-4-semi-Q67.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-wip.fs.fix-undeclared-acsl-variable-e7c74ae-m [2024-02-07 19:20:01,158 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 19:20:01,221 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 19:20:01,224 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 19:20:01,229 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 19:20:01,244 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 19:20:01,246 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 19:20:01,247 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 19:20:01,247 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 19:20:01,252 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 19:20:01,252 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 19:20:01,252 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 19:20:01,253 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 19:20:01,254 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 19:20:01,254 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 19:20:01,255 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 19:20:01,255 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 19:20:01,255 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 19:20:01,255 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 19:20:01,255 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 19:20:01,256 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 19:20:01,256 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 19:20:01,256 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 19:20:01,256 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 19:20:01,257 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 19:20:01,257 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 19:20:01,257 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 19:20:01,257 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 19:20:01,257 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 19:20:01,258 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 19:20:01,258 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 19:20:01,258 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 19:20:01,258 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:20:01,259 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 19:20:01,259 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 19:20:01,259 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 19:20:01,259 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 19:20:01,259 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 19:20:01,259 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 19:20:01,260 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 19:20:01,260 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 19:20:01,260 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 19:20:01,260 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 19:20:01,261 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 19:20:01,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 19:20:01,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 19:20:01,432 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 19:20:01,433 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 19:20:01,433 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 19:20:01,434 INFO L431 ainManager$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-proofs-counter-add-4-semi-Q67.wvr.yml/witness.yml [2024-02-07 19:20:01,510 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 19:20:01,511 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 19:20:01,511 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2024-02-07 19:20:02,378 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 19:20:02,549 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 19:20:02,549 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2024-02-07 19:20:02,555 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eaebc3c9/9f38183fdf7f49d4be5e87c9eeae785c/FLAG2af508cfb [2024-02-07 19:20:02,565 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eaebc3c9/9f38183fdf7f49d4be5e87c9eeae785c [2024-02-07 19:20:02,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 19:20:02,569 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 19:20:02,571 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 19:20:02,572 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 19:20:02,575 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 19:20:02,576 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:20:01" (1/2) ... [2024-02-07 19:20:02,577 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e5bffe5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:20:02, skipping insertion in model container [2024-02-07 19:20:02,577 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:20:01" (1/2) ... [2024-02-07 19:20:02,578 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7461a60d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:20:02, skipping insertion in model container [2024-02-07 19:20:02,578 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:20:02" (2/2) ... [2024-02-07 19:20:02,578 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e5bffe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:02, skipping insertion in model container [2024-02-07 19:20:02,578 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:20:02" (2/2) ... [2024-02-07 19:20:02,579 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 19:20:02,597 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 19:20:02,598 INFO L76 edCorrectnessWitness]: Location invariant before [L55-L55] (0 <= i2) && (counter <= 2147483646) [2024-02-07 19:20:02,599 INFO L76 edCorrectnessWitness]: Location invariant before [L43-L43] (-2147483647 <= counter) && (0 <= i1) [2024-02-07 19:20:02,599 INFO L76 edCorrectnessWitness]: Location invariant before [L56-L56] 1 <= i2 [2024-02-07 19:20:02,599 INFO L76 edCorrectnessWitness]: Location invariant before [L44-L44] 1 <= i1 [2024-02-07 19:20:02,599 INFO L76 edCorrectnessWitness]: Location invariant before [L78-L78] (0 <= j2) && (counter <= 2147483646) [2024-02-07 19:20:02,600 INFO L76 edCorrectnessWitness]: Location invariant before [L79-L79] 1 <= j2 [2024-02-07 19:20:02,600 INFO L76 edCorrectnessWitness]: Location invariant before [L66-L66] (-2147483647 <= counter) && (0 <= j1) [2024-02-07 19:20:02,600 INFO L76 edCorrectnessWitness]: Location invariant before [L67-L67] 1 <= j1 [2024-02-07 19:20:02,616 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 19:20:02,757 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-proofs-counter-add-4-semi-Q67.wvr.c[2663,2676] [2024-02-07 19:20:02,761 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:20:02,767 INFO L206 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 19:20:02,801 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-proofs-counter-add-4-semi-Q67.wvr.c[2663,2676] [2024-02-07 19:20:02,801 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:20:02,813 INFO L211 MainTranslator]: Completed translation [2024-02-07 19:20:02,813 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:02 WrapperNode [2024-02-07 19:20:02,813 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 19:20:02,814 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 19:20:02,814 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 19:20:02,814 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 19:20:02,819 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:02" (1/1) ... [2024-02-07 19:20:02,824 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:02" (1/1) ... [2024-02-07 19:20:02,845 INFO L138 Inliner]: procedures = 22, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 142 [2024-02-07 19:20:02,845 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 19:20:02,846 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 19:20:02,846 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 19:20:02,846 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 19:20:02,854 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:02" (1/1) ... [2024-02-07 19:20:02,854 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:02" (1/1) ... [2024-02-07 19:20:02,857 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:02" (1/1) ... [2024-02-07 19:20:02,868 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 19:20:02,868 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:02" (1/1) ... [2024-02-07 19:20:02,868 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:02" (1/1) ... [2024-02-07 19:20:02,872 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:02" (1/1) ... [2024-02-07 19:20:02,874 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:02" (1/1) ... [2024-02-07 19:20:02,876 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:02" (1/1) ... [2024-02-07 19:20:02,876 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:02" (1/1) ... [2024-02-07 19:20:02,878 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 19:20:02,879 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 19:20:02,879 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 19:20:02,879 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 19:20:02,880 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:02" (1/1) ... [2024-02-07 19:20:02,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:20:02,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:20:02,904 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 19:20:02,907 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 19:20:02,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 19:20:02,932 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 19:20:02,932 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 19:20:02,932 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 19:20:02,932 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 19:20:02,932 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-07 19:20:02,933 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-07 19:20:02,933 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-02-07 19:20:02,933 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-02-07 19:20:02,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 19:20:02,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 19:20:02,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 19:20:02,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 19:20:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-07 19:20:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 19:20:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 19:20:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 19:20:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 19:20:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 19:20:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-07 19:20:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 19:20:02,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 19:20:02,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 19:20:02,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 19:20:02,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 19:20:02,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 19:20:02,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 19:20:02,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 19:20:02,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-07 19:20:02,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 19:20:02,940 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 19:20:03,030 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 19:20:03,032 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 19:20:03,226 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 19:20:03,226 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 19:20:03,379 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 19:20:03,379 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-02-07 19:20:03,380 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:20:03 BoogieIcfgContainer [2024-02-07 19:20:03,380 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 19:20:03,381 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 19:20:03,382 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 19:20:03,384 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 19:20:03,398 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:20:01" (1/4) ... [2024-02-07 19:20:03,399 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2248fe9e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:20:03, skipping insertion in model container [2024-02-07 19:20:03,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 07:20:02" (2/4) ... [2024-02-07 19:20:03,399 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2248fe9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:20:03, skipping insertion in model container [2024-02-07 19:20:03,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:02" (3/4) ... [2024-02-07 19:20:03,399 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2248fe9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:20:03, skipping insertion in model container [2024-02-07 19:20:03,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:20:03" (4/4) ... [2024-02-07 19:20:03,400 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-proofs-counter-add-4-semi-Q67.wvr.c [2024-02-07 19:20:03,414 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 19:20:03,414 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-02-07 19:20:03,414 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 19:20:03,466 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-02-07 19:20:03,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 122 flow [2024-02-07 19:20:03,553 INFO L124 PetriNetUnfolderBase]: 4/43 cut-off events. [2024-02-07 19:20:03,554 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-07 19:20:03,557 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 64 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-02-07 19:20:03,557 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 122 flow [2024-02-07 19:20:03,561 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 42 transitions, 108 flow [2024-02-07 19:20:03,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:20:03,579 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;@20bfcfd3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:20:03,579 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2024-02-07 19:20:03,586 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:20:03,586 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2024-02-07 19:20:03,586 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:20:03,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:03,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 19:20:03,588 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:20:03,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:03,592 INFO L85 PathProgramCache]: Analyzing trace with hash 435045937, now seen corresponding path program 1 times [2024-02-07 19:20:03,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:03,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900699429] [2024-02-07 19:20:03,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:03,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:03,852 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 19:20:03,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:03,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900699429] [2024-02-07 19:20:03,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900699429] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:03,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:03,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:20:03,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866004790] [2024-02-07 19:20:03,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:03,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:20:03,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:03,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:20:03,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:20:03,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 19:20:03,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:20:03,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:03,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 19:20:03,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:04,475 INFO L124 PetriNetUnfolderBase]: 4029/5253 cut-off events. [2024-02-07 19:20:04,476 INFO L125 PetriNetUnfolderBase]: For 303/303 co-relation queries the response was YES. [2024-02-07 19:20:04,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10458 conditions, 5253 events. 4029/5253 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 22204 event pairs, 589 based on Foata normal form. 53/3900 useless extension candidates. Maximal degree in co-relation 8423. Up to 4713 conditions per place. [2024-02-07 19:20:04,511 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 43 selfloop transitions, 4 changer transitions 3/59 dead transitions. [2024-02-07 19:20:04,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 263 flow [2024-02-07 19:20:04,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:20:04,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:20:04,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-02-07 19:20:04,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7304964539007093 [2024-02-07 19:20:04,522 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 108 flow. Second operand 3 states and 103 transitions. [2024-02-07 19:20:04,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 263 flow [2024-02-07 19:20:04,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 59 transitions, 233 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-02-07 19:20:04,531 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 120 flow [2024-02-07 19:20:04,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2024-02-07 19:20:04,535 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -9 predicate places. [2024-02-07 19:20:04,535 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 120 flow [2024-02-07 19:20:04,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:20:04,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:04,536 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-02-07 19:20:04,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 19:20:04,536 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:20:04,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:04,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1467333397, now seen corresponding path program 1 times [2024-02-07 19:20:04,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:04,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857303810] [2024-02-07 19:20:04,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:04,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:04,637 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 19:20:04,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:04,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857303810] [2024-02-07 19:20:04,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857303810] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:04,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:04,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:20:04,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823266330] [2024-02-07 19:20:04,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:04,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:20:04,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:04,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:20:04,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:20:04,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 19:20:04,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:20:04,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:04,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 19:20:04,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:05,080 INFO L124 PetriNetUnfolderBase]: 4403/5818 cut-off events. [2024-02-07 19:20:05,080 INFO L125 PetriNetUnfolderBase]: For 988/988 co-relation queries the response was YES. [2024-02-07 19:20:05,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14517 conditions, 5818 events. 4403/5818 cut-off events. For 988/988 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 26844 event pairs, 1597 based on Foata normal form. 0/4356 useless extension candidates. Maximal degree in co-relation 2135. Up to 3019 conditions per place. [2024-02-07 19:20:05,111 INFO L140 encePairwiseOnDemand]: 45/47 looper letters, 56 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-02-07 19:20:05,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 67 transitions, 311 flow [2024-02-07 19:20:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:20:05,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:20:05,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-02-07 19:20:05,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6737588652482269 [2024-02-07 19:20:05,113 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 120 flow. Second operand 3 states and 95 transitions. [2024-02-07 19:20:05,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 67 transitions, 311 flow [2024-02-07 19:20:05,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 67 transitions, 307 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:20:05,116 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 132 flow [2024-02-07 19:20:05,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2024-02-07 19:20:05,116 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2024-02-07 19:20:05,117 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 132 flow [2024-02-07 19:20:05,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:20:05,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:05,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:20:05,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 19:20:05,117 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:20:05,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:05,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1147096530, now seen corresponding path program 1 times [2024-02-07 19:20:05,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:05,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514274860] [2024-02-07 19:20:05,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:05,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:05,187 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 19:20:05,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:05,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514274860] [2024-02-07 19:20:05,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514274860] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:05,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:05,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:20:05,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982546232] [2024-02-07 19:20:05,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:05,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:20:05,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:05,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:20:05,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:20:05,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 19:20:05,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 19:20:05,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:05,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 19:20:05,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:05,575 INFO L124 PetriNetUnfolderBase]: 4451/5890 cut-off events. [2024-02-07 19:20:05,576 INFO L125 PetriNetUnfolderBase]: For 1848/1848 co-relation queries the response was YES. [2024-02-07 19:20:05,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15158 conditions, 5890 events. 4451/5890 cut-off events. For 1848/1848 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 26795 event pairs, 1093 based on Foata normal form. 0/4586 useless extension candidates. Maximal degree in co-relation 6940. Up to 5335 conditions per place. [2024-02-07 19:20:05,613 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 44 selfloop transitions, 3 changer transitions 3/59 dead transitions. [2024-02-07 19:20:05,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 271 flow [2024-02-07 19:20:05,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:20:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:20:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-02-07 19:20:05,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2024-02-07 19:20:05,618 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 132 flow. Second operand 3 states and 89 transitions. [2024-02-07 19:20:05,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 271 flow [2024-02-07 19:20:05,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 269 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:20:05,625 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 132 flow [2024-02-07 19:20:05,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-02-07 19:20:05,626 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2024-02-07 19:20:05,626 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 132 flow [2024-02-07 19:20:05,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 19:20:05,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:05,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:20:05,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 19:20:05,627 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:20:05,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:05,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1693045379, now seen corresponding path program 1 times [2024-02-07 19:20:05,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:05,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789983380] [2024-02-07 19:20:05,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:05,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:05,776 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 19:20:05,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:05,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789983380] [2024-02-07 19:20:05,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789983380] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:05,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:05,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:20:05,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085348319] [2024-02-07 19:20:05,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:05,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:20:05,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:05,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:20:05,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:20:05,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 19:20:05,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 19:20:05,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:05,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 19:20:05,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:06,388 INFO L124 PetriNetUnfolderBase]: 6847/9329 cut-off events. [2024-02-07 19:20:06,388 INFO L125 PetriNetUnfolderBase]: For 2416/2416 co-relation queries the response was YES. [2024-02-07 19:20:06,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23730 conditions, 9329 events. 6847/9329 cut-off events. For 2416/2416 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 48207 event pairs, 883 based on Foata normal form. 244/7578 useless extension candidates. Maximal degree in co-relation 7863. Up to 5995 conditions per place. [2024-02-07 19:20:06,434 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 65 selfloop transitions, 16 changer transitions 1/91 dead transitions. [2024-02-07 19:20:06,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 91 transitions, 452 flow [2024-02-07 19:20:06,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:20:06,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:20:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-02-07 19:20:06,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7180851063829787 [2024-02-07 19:20:06,436 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 132 flow. Second operand 4 states and 135 transitions. [2024-02-07 19:20:06,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 91 transitions, 452 flow [2024-02-07 19:20:06,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 91 transitions, 446 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:20:06,440 INFO L231 Difference]: Finished difference. Result has 49 places, 54 transitions, 277 flow [2024-02-07 19:20:06,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=277, PETRI_PLACES=49, PETRI_TRANSITIONS=54} [2024-02-07 19:20:06,442 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2024-02-07 19:20:06,442 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 54 transitions, 277 flow [2024-02-07 19:20:06,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 19:20:06,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:06,443 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:20:06,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 19:20:06,443 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:20:06,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:06,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1767017616, now seen corresponding path program 1 times [2024-02-07 19:20:06,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:06,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049977211] [2024-02-07 19:20:06,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:06,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 19:20:06,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:06,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049977211] [2024-02-07 19:20:06,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049977211] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:06,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:06,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:20:06,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946602749] [2024-02-07 19:20:06,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:06,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:20:06,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:06,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:20:06,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:20:06,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 19:20:06,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 54 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 19:20:06,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:06,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 19:20:06,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:06,961 INFO L124 PetriNetUnfolderBase]: 4607/6333 cut-off events. [2024-02-07 19:20:06,961 INFO L125 PetriNetUnfolderBase]: For 7656/7656 co-relation queries the response was YES. [2024-02-07 19:20:06,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20796 conditions, 6333 events. 4607/6333 cut-off events. For 7656/7656 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 32686 event pairs, 2297 based on Foata normal form. 0/5343 useless extension candidates. Maximal degree in co-relation 10432. Up to 5967 conditions per place. [2024-02-07 19:20:06,991 INFO L140 encePairwiseOnDemand]: 45/47 looper letters, 41 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2024-02-07 19:20:06,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 51 transitions, 340 flow [2024-02-07 19:20:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:20:06,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:20:06,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-02-07 19:20:06,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48226950354609927 [2024-02-07 19:20:06,992 INFO L175 Difference]: Start difference. First operand has 49 places, 54 transitions, 277 flow. Second operand 3 states and 68 transitions. [2024-02-07 19:20:06,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 51 transitions, 340 flow [2024-02-07 19:20:06,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 51 transitions, 340 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:20:06,995 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 258 flow [2024-02-07 19:20:06,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2024-02-07 19:20:06,998 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2024-02-07 19:20:06,998 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 258 flow [2024-02-07 19:20:06,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 19:20:06,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:06,999 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:20:06,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 19:20:06,999 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:20:07,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:07,000 INFO L85 PathProgramCache]: Analyzing trace with hash 582184376, now seen corresponding path program 1 times [2024-02-07 19:20:07,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:07,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930992920] [2024-02-07 19:20:07,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:07,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 19:20:07,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:07,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930992920] [2024-02-07 19:20:07,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930992920] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:07,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:07,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:20:07,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328852301] [2024-02-07 19:20:07,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:07,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:20:07,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:07,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:20:07,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:20:07,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 19:20:07,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 258 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 19:20:07,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:07,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 19:20:07,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:07,541 INFO L124 PetriNetUnfolderBase]: 4357/6026 cut-off events. [2024-02-07 19:20:07,541 INFO L125 PetriNetUnfolderBase]: For 6866/6866 co-relation queries the response was YES. [2024-02-07 19:20:07,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19423 conditions, 6026 events. 4357/6026 cut-off events. For 6866/6866 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 30738 event pairs, 1337 based on Foata normal form. 0/5296 useless extension candidates. Maximal degree in co-relation 19410. Up to 3500 conditions per place. [2024-02-07 19:20:07,568 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 63 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2024-02-07 19:20:07,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 492 flow [2024-02-07 19:20:07,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:20:07,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:20:07,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-02-07 19:20:07,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6524822695035462 [2024-02-07 19:20:07,570 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 258 flow. Second operand 3 states and 92 transitions. [2024-02-07 19:20:07,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 492 flow [2024-02-07 19:20:07,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 491 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:20:07,574 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 240 flow [2024-02-07 19:20:07,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2024-02-07 19:20:07,576 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2024-02-07 19:20:07,577 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 240 flow [2024-02-07 19:20:07,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 19:20:07,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:07,577 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:20:07,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 19:20:07,577 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:20:07,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:07,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1223925581, now seen corresponding path program 1 times [2024-02-07 19:20:07,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:07,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467475977] [2024-02-07 19:20:07,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:07,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:07,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:07,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467475977] [2024-02-07 19:20:07,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467475977] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:07,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:07,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:20:07,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589272786] [2024-02-07 19:20:07,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:07,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:20:07,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:07,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:20:07,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:20:07,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 19:20:07,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 19:20:07,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:07,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 19:20:07,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:08,064 INFO L124 PetriNetUnfolderBase]: 5339/7388 cut-off events. [2024-02-07 19:20:08,064 INFO L125 PetriNetUnfolderBase]: For 10348/10348 co-relation queries the response was YES. [2024-02-07 19:20:08,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23915 conditions, 7388 events. 5339/7388 cut-off events. For 10348/10348 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 39218 event pairs, 2075 based on Foata normal form. 0/6465 useless extension candidates. Maximal degree in co-relation 23901. Up to 5238 conditions per place. [2024-02-07 19:20:08,106 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 57 selfloop transitions, 5 changer transitions 0/71 dead transitions. [2024-02-07 19:20:08,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 457 flow [2024-02-07 19:20:08,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:20:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:20:08,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-02-07 19:20:08,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2024-02-07 19:20:08,108 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 240 flow. Second operand 3 states and 89 transitions. [2024-02-07 19:20:08,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 457 flow [2024-02-07 19:20:08,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 446 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:20:08,113 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 292 flow [2024-02-07 19:20:08,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=292, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2024-02-07 19:20:08,114 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2024-02-07 19:20:08,114 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 292 flow [2024-02-07 19:20:08,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 19:20:08,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:08,115 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:20:08,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 19:20:08,115 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:20:08,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:08,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1637810557, now seen corresponding path program 2 times [2024-02-07 19:20:08,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:08,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223516547] [2024-02-07 19:20:08,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:08,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:08,195 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 19:20:08,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:08,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223516547] [2024-02-07 19:20:08,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223516547] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:20:08,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562242541] [2024-02-07 19:20:08,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:20:08,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:20:08,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:20:08,199 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 19:20:08,242 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 19:20:08,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:20:08,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:20:08,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 19:20:08,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:20:08,377 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 19:20:08,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:20:08,484 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 19:20:08,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562242541] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:20:08,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:20:08,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-02-07 19:20:08,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776705692] [2024-02-07 19:20:08,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:20:08,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 19:20:08,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:08,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 19:20:08,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2024-02-07 19:20:08,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 19:20:08,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 292 flow. Second operand has 11 states, 11 states have (on average 14.909090909090908) internal successors, (164), 11 states have internal predecessors, (164), 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 19:20:08,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:08,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 19:20:08,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:10,354 INFO L124 PetriNetUnfolderBase]: 20219/28365 cut-off events. [2024-02-07 19:20:10,354 INFO L125 PetriNetUnfolderBase]: For 76986/76986 co-relation queries the response was YES. [2024-02-07 19:20:10,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97503 conditions, 28365 events. 20219/28365 cut-off events. For 76986/76986 co-relation queries the response was YES. Maximal size of possible extension queue 1383. Compared 179643 event pairs, 1511 based on Foata normal form. 2168/28506 useless extension candidates. Maximal degree in co-relation 97489. Up to 11557 conditions per place. [2024-02-07 19:20:10,683 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 193 selfloop transitions, 72 changer transitions 1/275 dead transitions. [2024-02-07 19:20:10,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 275 transitions, 1826 flow [2024-02-07 19:20:10,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 19:20:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 19:20:10,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 389 transitions. [2024-02-07 19:20:10,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7524177949709865 [2024-02-07 19:20:10,686 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 292 flow. Second operand 11 states and 389 transitions. [2024-02-07 19:20:10,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 275 transitions, 1826 flow [2024-02-07 19:20:10,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 275 transitions, 1760 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-02-07 19:20:10,849 INFO L231 Difference]: Finished difference. Result has 69 places, 111 transitions, 1129 flow [2024-02-07 19:20:10,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1129, PETRI_PLACES=69, PETRI_TRANSITIONS=111} [2024-02-07 19:20:10,850 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2024-02-07 19:20:10,851 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 111 transitions, 1129 flow [2024-02-07 19:20:10,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.909090909090908) internal successors, (164), 11 states have internal predecessors, (164), 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 19:20:10,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:10,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:20:10,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-07 19:20:11,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:20:11,066 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread4Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:20:11,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:11,067 INFO L85 PathProgramCache]: Analyzing trace with hash 125486164, now seen corresponding path program 1 times [2024-02-07 19:20:11,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:11,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678363149] [2024-02-07 19:20:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:11,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:11,131 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 19:20:11,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:11,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678363149] [2024-02-07 19:20:11,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678363149] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:11,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:11,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:20:11,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966279751] [2024-02-07 19:20:11,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:11,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:20:11,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:11,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:20:11,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:20:11,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 19:20:11,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 111 transitions, 1129 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 19:20:11,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:11,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 19:20:11,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:13,382 INFO L124 PetriNetUnfolderBase]: 21347/30156 cut-off events. [2024-02-07 19:20:13,383 INFO L125 PetriNetUnfolderBase]: For 123014/123100 co-relation queries the response was YES. [2024-02-07 19:20:13,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121996 conditions, 30156 events. 21347/30156 cut-off events. For 123014/123100 co-relation queries the response was YES. Maximal size of possible extension queue 1517. Compared 195150 event pairs, 2345 based on Foata normal form. 22/28213 useless extension candidates. Maximal degree in co-relation 121972. Up to 25747 conditions per place. [2024-02-07 19:20:13,587 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 133 selfloop transitions, 16 changer transitions 3/161 dead transitions. [2024-02-07 19:20:13,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 161 transitions, 1692 flow [2024-02-07 19:20:13,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:20:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:20:13,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-02-07 19:20:13,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-02-07 19:20:13,588 INFO L175 Difference]: Start difference. First operand has 69 places, 111 transitions, 1129 flow. Second operand 4 states and 124 transitions. [2024-02-07 19:20:13,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 161 transitions, 1692 flow [2024-02-07 19:20:14,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 161 transitions, 1562 flow, removed 65 selfloop flow, removed 0 redundant places. [2024-02-07 19:20:14,065 INFO L231 Difference]: Finished difference. Result has 74 places, 124 transitions, 1251 flow [2024-02-07 19:20:14,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1009, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1251, PETRI_PLACES=74, PETRI_TRANSITIONS=124} [2024-02-07 19:20:14,066 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 23 predicate places. [2024-02-07 19:20:14,066 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 124 transitions, 1251 flow [2024-02-07 19:20:14,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 19:20:14,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:14,066 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:20:14,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-07 19:20:14,067 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread4Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:20:14,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:14,067 INFO L85 PathProgramCache]: Analyzing trace with hash 317013808, now seen corresponding path program 2 times [2024-02-07 19:20:14,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:14,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56712371] [2024-02-07 19:20:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:14,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:14,118 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 19:20:14,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:14,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56712371] [2024-02-07 19:20:14,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56712371] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:20:14,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261145616] [2024-02-07 19:20:14,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:20:14,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:20:14,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:20:14,120 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 19:20:14,136 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 19:20:14,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:20:14,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:20:14,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 19:20:14,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:20:14,268 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 19:20:14,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:20:14,336 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 19:20:14,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261145616] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:20:14,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:20:14,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-02-07 19:20:14,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880716788] [2024-02-07 19:20:14,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:20:14,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 19:20:14,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:14,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 19:20:14,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2024-02-07 19:20:14,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 19:20:14,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 124 transitions, 1251 flow. Second operand has 11 states, 11 states have (on average 16.0) internal successors, (176), 11 states have internal predecessors, (176), 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 19:20:14,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:14,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 19:20:14,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:17,675 INFO L124 PetriNetUnfolderBase]: 28861/40867 cut-off events. [2024-02-07 19:20:17,675 INFO L125 PetriNetUnfolderBase]: For 175120/175370 co-relation queries the response was YES. [2024-02-07 19:20:17,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154885 conditions, 40867 events. 28861/40867 cut-off events. For 175120/175370 co-relation queries the response was YES. Maximal size of possible extension queue 1309. Compared 263651 event pairs, 2778 based on Foata normal form. 66/39967 useless extension candidates. Maximal degree in co-relation 154857. Up to 15843 conditions per place. [2024-02-07 19:20:18,137 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 207 selfloop transitions, 143 changer transitions 3/362 dead transitions. [2024-02-07 19:20:18,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 362 transitions, 3375 flow [2024-02-07 19:20:18,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 19:20:18,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 19:20:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 365 transitions. [2024-02-07 19:20:18,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7059961315280464 [2024-02-07 19:20:18,139 INFO L175 Difference]: Start difference. First operand has 74 places, 124 transitions, 1251 flow. Second operand 11 states and 365 transitions. [2024-02-07 19:20:18,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 362 transitions, 3375 flow [2024-02-07 19:20:18,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 362 transitions, 3360 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-02-07 19:20:18,650 INFO L231 Difference]: Finished difference. Result has 87 places, 204 transitions, 2657 flow [2024-02-07 19:20:18,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2657, PETRI_PLACES=87, PETRI_TRANSITIONS=204} [2024-02-07 19:20:18,651 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 36 predicate places. [2024-02-07 19:20:18,651 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 204 transitions, 2657 flow [2024-02-07 19:20:18,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.0) internal successors, (176), 11 states have internal predecessors, (176), 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 19:20:18,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:18,651 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:20:18,663 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 19:20:18,863 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,SelfDestructingSolverStorable9 [2024-02-07 19:20:18,863 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:20:18,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:18,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1161698157, now seen corresponding path program 3 times [2024-02-07 19:20:18,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:18,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587782035] [2024-02-07 19:20:18,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:18,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:18,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:18,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587782035] [2024-02-07 19:20:18,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587782035] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:20:18,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116156338] [2024-02-07 19:20:18,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 19:20:18,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:20:18,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:20:18,980 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 19:20:19,004 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 19:20:19,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-02-07 19:20:19,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:20:19,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 19:20:19,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:20:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:19,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:20:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:19,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116156338] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:20:19,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:20:19,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-02-07 19:20:19,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578418809] [2024-02-07 19:20:19,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:20:19,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-07 19:20:19,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:19,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-07 19:20:19,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=274, Unknown=0, NotChecked=0, Total=506 [2024-02-07 19:20:19,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 19:20:19,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 204 transitions, 2657 flow. Second operand has 23 states, 23 states have (on average 14.434782608695652) internal successors, (332), 23 states have internal predecessors, (332), 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 19:20:19,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:19,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 19:20:19,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand