./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 958ec4d9 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-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-dev-958ec4d-m [2024-02-07 14:42:07,560 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:42:07,625 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:42:07,636 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:42:07,637 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:42:07,679 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:42:07,680 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:42:07,680 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:42:07,681 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:42:07,684 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:42:07,684 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:42:07,685 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:42:07,686 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:42:07,687 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:42:07,687 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:42:07,687 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:42:07,688 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:42:07,688 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:42:07,688 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:42:07,688 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:42:07,689 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:42:07,690 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:42:07,690 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:42:07,690 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:42:07,690 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:42:07,691 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:42:07,691 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:42:07,691 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:42:07,692 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:42:07,692 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:42:07,693 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:42:07,693 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:42:07,693 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:42:07,693 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:42:07,693 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:42:07,694 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:42:07,694 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:42:07,694 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:42:07,694 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:42:07,694 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:42:07,695 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:42:07,695 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:42:07,695 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:42:07,695 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:42:07,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:42:07,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:42:07,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:42:07,957 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:42:07,958 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:42:07,959 INFO L431 ainManager$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 14:42:09,036 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:42:09,213 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:42:09,214 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2024-02-07 14:42:09,224 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da5280694/44afda092cc5457eb170032b45f10975/FLAGe9bc44fbe [2024-02-07 14:42:09,605 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da5280694/44afda092cc5457eb170032b45f10975 [2024-02-07 14:42:09,607 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:42:09,608 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:42:09,610 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-proofs-counter-add-4-semi-Q67.wvr.yml/witness.yml [2024-02-07 14:42:09,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:42:09,661 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:42:09,662 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:42:09,662 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:42:09,666 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:42:09,666 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:42:09" (1/2) ... [2024-02-07 14:42:09,667 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bcc24ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:42:09, skipping insertion in model container [2024-02-07 14:42:09,667 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:42:09" (1/2) ... [2024-02-07 14:42:09,669 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2fa6994f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:42:09, skipping insertion in model container [2024-02-07 14:42:09,669 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:42:09" (2/2) ... [2024-02-07 14:42:09,670 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bcc24ab and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:42:09, skipping insertion in model container [2024-02-07 14:42:09,670 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:42:09" (2/2) ... [2024-02-07 14:42:09,670 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:42:09,689 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:42:09,691 INFO L76 edCorrectnessWitness]: Location invariant before [L67-L67] 1 <= j1 [2024-02-07 14:42:09,691 INFO L76 edCorrectnessWitness]: Location invariant before [L44-L44] 1 <= i1 [2024-02-07 14:42:09,691 INFO L76 edCorrectnessWitness]: Location invariant before [L55-L55] (0 <= i2) && (counter <= 2147483646) [2024-02-07 14:42:09,691 INFO L76 edCorrectnessWitness]: Location invariant before [L43-L43] (-2147483647 <= counter) && (0 <= i1) [2024-02-07 14:42:09,693 INFO L76 edCorrectnessWitness]: Location invariant before [L78-L78] (0 <= j2) && (counter <= 2147483646) [2024-02-07 14:42:09,694 INFO L76 edCorrectnessWitness]: Location invariant before [L79-L79] 1 <= j2 [2024-02-07 14:42:09,694 INFO L76 edCorrectnessWitness]: Location invariant before [L66-L66] (-2147483647 <= counter) && (0 <= j1) [2024-02-07 14:42:09,694 INFO L76 edCorrectnessWitness]: Location invariant before [L56-L56] 1 <= i2 [2024-02-07 14:42:09,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:42:09,868 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 14:42:09,871 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:42:09,877 INFO L203 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 14:42:09,939 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 14:42:09,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:42:09,964 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:42:09,965 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:42:09 WrapperNode [2024-02-07 14:42:09,965 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:42:09,966 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:42:09,966 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:42:09,966 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:42:09,971 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:42:09" (1/1) ... [2024-02-07 14:42:09,986 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:42:09" (1/1) ... [2024-02-07 14:42:10,015 INFO L138 Inliner]: procedures = 22, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 142 [2024-02-07 14:42:10,016 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:42:10,017 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:42:10,017 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:42:10,017 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:42:10,030 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:42:09" (1/1) ... [2024-02-07 14:42:10,030 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:42:09" (1/1) ... [2024-02-07 14:42:10,044 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:42:09" (1/1) ... [2024-02-07 14:42:10,062 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-02-07 14:42:10,068 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:42:09" (1/1) ... [2024-02-07 14:42:10,068 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:42:09" (1/1) ... [2024-02-07 14:42:10,072 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:42:09" (1/1) ... [2024-02-07 14:42:10,086 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:42:09" (1/1) ... [2024-02-07 14:42:10,088 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:42:09" (1/1) ... [2024-02-07 14:42:10,089 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:42:09" (1/1) ... [2024-02-07 14:42:10,096 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:42:10,096 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:42:10,097 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:42:10,097 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:42:10,097 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:42:09" (1/1) ... [2024-02-07 14:42:10,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:42:10,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:42:10,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-07 14:42:10,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-07 14:42:10,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:42:10,176 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 14:42:10,177 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 14:42:10,177 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 14:42:10,177 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 14:42:10,177 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-07 14:42:10,177 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-07 14:42:10,178 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-02-07 14:42:10,178 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-02-07 14:42:10,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:42:10,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:42:10,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:42:10,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 14:42:10,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-07 14:42:10,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:42:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:42:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:42:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:42:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 14:42:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-07 14:42:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 14:42:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 14:42:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:42:10,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:42:10,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:42:10,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:42:10,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:42:10,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 14:42:10,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-07 14:42:10,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:42:10,186 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 14:42:10,308 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:42:10,309 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:42:10,565 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:42:10,565 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:42:10,729 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:42:10,729 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-02-07 14:42:10,729 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:42:10 BoogieIcfgContainer [2024-02-07 14:42:10,729 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:42:10,731 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:42:10,731 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:42:10,733 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:42:10,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:42:09" (1/4) ... [2024-02-07 14:42:10,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6629518c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:42:10, skipping insertion in model container [2024-02-07 14:42:10,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:42:09" (2/4) ... [2024-02-07 14:42:10,734 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6629518c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:42:10, skipping insertion in model container [2024-02-07 14:42:10,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:42:09" (3/4) ... [2024-02-07 14:42:10,734 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6629518c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:42:10, skipping insertion in model container [2024-02-07 14:42:10,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:42:10" (4/4) ... [2024-02-07 14:42:10,735 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-proofs-counter-add-4-semi-Q67.wvr.c [2024-02-07 14:42:10,748 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:42:10,748 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-02-07 14:42:10,748 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:42:10,784 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-02-07 14:42:10,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 122 flow [2024-02-07 14:42:10,825 INFO L124 PetriNetUnfolderBase]: 4/43 cut-off events. [2024-02-07 14:42:10,825 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-07 14:42:10,828 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 14:42:10,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 122 flow [2024-02-07 14:42:10,830 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 42 transitions, 108 flow [2024-02-07 14:42:10,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:42:10,841 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;@124aeee5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:42:10,841 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2024-02-07 14:42:10,844 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:42:10,844 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2024-02-07 14:42:10,844 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:42:10,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:42:10,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:42:10,845 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:42:10,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:42:10,849 INFO L85 PathProgramCache]: Analyzing trace with hash 435045937, now seen corresponding path program 1 times [2024-02-07 14:42:10,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:42:10,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148458716] [2024-02-07 14:42:10,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:42:10,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:42:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:42:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:11,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:42:11,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148458716] [2024-02-07 14:42:11,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148458716] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:42:11,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:42:11,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:42:11,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983592914] [2024-02-07 14:42:11,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:42:11,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:42:11,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:42:11,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:42:11,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:42:11,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 14:42:11,184 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 14:42:11,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:42:11,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 14:42:11,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:42:11,841 INFO L124 PetriNetUnfolderBase]: 4029/5253 cut-off events. [2024-02-07 14:42:11,841 INFO L125 PetriNetUnfolderBase]: For 303/303 co-relation queries the response was YES. [2024-02-07 14:42:11,851 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 14:42:11,878 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 43 selfloop transitions, 4 changer transitions 3/59 dead transitions. [2024-02-07 14:42:11,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 263 flow [2024-02-07 14:42:11,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:42:11,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:42:11,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-02-07 14:42:11,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7304964539007093 [2024-02-07 14:42:11,892 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 108 flow. Second operand 3 states and 103 transitions. [2024-02-07 14:42:11,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 263 flow [2024-02-07 14:42:11,898 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 14:42:11,902 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 120 flow [2024-02-07 14:42:11,904 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 14:42:11,908 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -9 predicate places. [2024-02-07 14:42:11,908 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 120 flow [2024-02-07 14:42:11,908 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 14:42:11,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:42:11,909 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-02-07 14:42:11,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:42:11,909 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:42:11,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:42:11,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1467333397, now seen corresponding path program 1 times [2024-02-07 14:42:11,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:42:11,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605266034] [2024-02-07 14:42:11,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:42:11,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:42:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:42:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:11,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:42:11,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605266034] [2024-02-07 14:42:11,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605266034] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:42:11,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:42:11,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:42:11,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353099699] [2024-02-07 14:42:11,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:42:11,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:42:11,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:42:11,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:42:11,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:42:11,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 14:42:11,987 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 14:42:11,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:42:11,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 14:42:11,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:42:12,433 INFO L124 PetriNetUnfolderBase]: 4403/5818 cut-off events. [2024-02-07 14:42:12,438 INFO L125 PetriNetUnfolderBase]: For 988/988 co-relation queries the response was YES. [2024-02-07 14:42:12,443 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 14:42:12,469 INFO L140 encePairwiseOnDemand]: 45/47 looper letters, 56 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-02-07 14:42:12,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 67 transitions, 311 flow [2024-02-07 14:42:12,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:42:12,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:42:12,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-02-07 14:42:12,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6737588652482269 [2024-02-07 14:42:12,471 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 120 flow. Second operand 3 states and 95 transitions. [2024-02-07 14:42:12,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 67 transitions, 311 flow [2024-02-07 14:42:12,472 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 14:42:12,473 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 132 flow [2024-02-07 14:42:12,473 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 14:42:12,473 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2024-02-07 14:42:12,474 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 132 flow [2024-02-07 14:42:12,474 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 14:42:12,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:42:12,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:42:12,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:42:12,474 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:42:12,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:42:12,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1147096530, now seen corresponding path program 1 times [2024-02-07 14:42:12,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:42:12,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631473007] [2024-02-07 14:42:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:42:12,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:42:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:42:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:12,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:42:12,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631473007] [2024-02-07 14:42:12,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631473007] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:42:12,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:42:12,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:42:12,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111335566] [2024-02-07 14:42:12,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:42:12,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:42:12,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:42:12,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:42:12,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:42:12,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 14:42:12,564 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 14:42:12,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:42:12,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 14:42:12,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:42:12,955 INFO L124 PetriNetUnfolderBase]: 4451/5890 cut-off events. [2024-02-07 14:42:12,955 INFO L125 PetriNetUnfolderBase]: For 1848/1848 co-relation queries the response was YES. [2024-02-07 14:42:12,962 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 14:42:12,994 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 44 selfloop transitions, 3 changer transitions 3/59 dead transitions. [2024-02-07 14:42:12,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 271 flow [2024-02-07 14:42:12,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:42:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:42:12,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-02-07 14:42:12,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2024-02-07 14:42:12,999 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 132 flow. Second operand 3 states and 89 transitions. [2024-02-07 14:42:12,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 271 flow [2024-02-07 14:42:13,006 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 14:42:13,008 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 132 flow [2024-02-07 14:42:13,008 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 14:42:13,010 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2024-02-07 14:42:13,011 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 132 flow [2024-02-07 14:42:13,011 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 14:42:13,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:42:13,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:42:13,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:42:13,011 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:42:13,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:42:13,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1693045379, now seen corresponding path program 1 times [2024-02-07 14:42:13,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:42:13,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210395156] [2024-02-07 14:42:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:42:13,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:42:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:42:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:13,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:42:13,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210395156] [2024-02-07 14:42:13,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210395156] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:42:13,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:42:13,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:42:13,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109663062] [2024-02-07 14:42:13,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:42:13,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:42:13,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:42:13,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:42:13,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:42:13,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 14:42:13,079 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 14:42:13,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:42:13,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 14:42:13,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:42:13,691 INFO L124 PetriNetUnfolderBase]: 6847/9329 cut-off events. [2024-02-07 14:42:13,691 INFO L125 PetriNetUnfolderBase]: For 2416/2416 co-relation queries the response was YES. [2024-02-07 14:42:13,702 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 14:42:13,739 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 65 selfloop transitions, 16 changer transitions 1/91 dead transitions. [2024-02-07 14:42:13,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 91 transitions, 452 flow [2024-02-07 14:42:13,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:42:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:42:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-02-07 14:42:13,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7180851063829787 [2024-02-07 14:42:13,740 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 132 flow. Second operand 4 states and 135 transitions. [2024-02-07 14:42:13,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 91 transitions, 452 flow [2024-02-07 14:42:13,742 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 14:42:13,743 INFO L231 Difference]: Finished difference. Result has 49 places, 54 transitions, 277 flow [2024-02-07 14:42:13,743 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 14:42:13,744 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2024-02-07 14:42:13,744 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 54 transitions, 277 flow [2024-02-07 14:42:13,744 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 14:42:13,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:42:13,744 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:42:13,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 14:42:13,745 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:42:13,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:42:13,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1767017616, now seen corresponding path program 1 times [2024-02-07 14:42:13,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:42:13,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371418512] [2024-02-07 14:42:13,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:42:13,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:42:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:42:13,787 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 14:42:13,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:42:13,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371418512] [2024-02-07 14:42:13,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371418512] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:42:13,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:42:13,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:42:13,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853969891] [2024-02-07 14:42:13,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:42:13,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:42:13,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:42:13,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:42:13,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:42:13,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 14:42:13,792 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 14:42:13,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:42:13,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 14:42:13,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:42:14,240 INFO L124 PetriNetUnfolderBase]: 4607/6333 cut-off events. [2024-02-07 14:42:14,240 INFO L125 PetriNetUnfolderBase]: For 7656/7656 co-relation queries the response was YES. [2024-02-07 14:42:14,247 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 14:42:14,269 INFO L140 encePairwiseOnDemand]: 45/47 looper letters, 41 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2024-02-07 14:42:14,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 51 transitions, 340 flow [2024-02-07 14:42:14,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:42:14,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:42:14,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-02-07 14:42:14,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48226950354609927 [2024-02-07 14:42:14,271 INFO L175 Difference]: Start difference. First operand has 49 places, 54 transitions, 277 flow. Second operand 3 states and 68 transitions. [2024-02-07 14:42:14,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 51 transitions, 340 flow [2024-02-07 14:42:14,273 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 14:42:14,274 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 258 flow [2024-02-07 14:42:14,274 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 14:42:14,276 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2024-02-07 14:42:14,276 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 258 flow [2024-02-07 14:42:14,276 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 14:42:14,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:42:14,277 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:42:14,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:42:14,277 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:42:14,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:42:14,278 INFO L85 PathProgramCache]: Analyzing trace with hash 582184376, now seen corresponding path program 1 times [2024-02-07 14:42:14,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:42:14,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786137080] [2024-02-07 14:42:14,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:42:14,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:42:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:42:14,352 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 14:42:14,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:42:14,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786137080] [2024-02-07 14:42:14,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786137080] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:42:14,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:42:14,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:42:14,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28004029] [2024-02-07 14:42:14,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:42:14,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:42:14,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:42:14,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:42:14,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:42:14,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 14:42:14,358 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 14:42:14,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:42:14,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 14:42:14,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:42:14,764 INFO L124 PetriNetUnfolderBase]: 4357/6026 cut-off events. [2024-02-07 14:42:14,764 INFO L125 PetriNetUnfolderBase]: For 6866/6866 co-relation queries the response was YES. [2024-02-07 14:42:14,772 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 14:42:14,797 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 63 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2024-02-07 14:42:14,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 492 flow [2024-02-07 14:42:14,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:42:14,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:42:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-02-07 14:42:14,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6524822695035462 [2024-02-07 14:42:14,799 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 258 flow. Second operand 3 states and 92 transitions. [2024-02-07 14:42:14,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 492 flow [2024-02-07 14:42:14,802 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 14:42:14,804 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 240 flow [2024-02-07 14:42:14,804 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 14:42:14,806 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2024-02-07 14:42:14,807 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 240 flow [2024-02-07 14:42:14,807 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 14:42:14,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:42:14,807 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:42:14,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 14:42:14,807 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:42:14,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:42:14,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1223925581, now seen corresponding path program 1 times [2024-02-07 14:42:14,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:42:14,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981547945] [2024-02-07 14:42:14,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:42:14,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:42:14,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:42:14,864 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 14:42:14,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:42:14,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981547945] [2024-02-07 14:42:14,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981547945] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:42:14,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:42:14,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:42:14,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019667496] [2024-02-07 14:42:14,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:42:14,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:42:14,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:42:14,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:42:14,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:42:14,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 14:42:14,869 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 14:42:14,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:42:14,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 14:42:14,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:42:15,360 INFO L124 PetriNetUnfolderBase]: 5339/7388 cut-off events. [2024-02-07 14:42:15,361 INFO L125 PetriNetUnfolderBase]: For 10348/10348 co-relation queries the response was YES. [2024-02-07 14:42:15,371 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 14:42:15,396 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 57 selfloop transitions, 5 changer transitions 0/71 dead transitions. [2024-02-07 14:42:15,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 457 flow [2024-02-07 14:42:15,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:42:15,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:42:15,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-02-07 14:42:15,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2024-02-07 14:42:15,398 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 240 flow. Second operand 3 states and 89 transitions. [2024-02-07 14:42:15,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 457 flow [2024-02-07 14:42:15,401 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 14:42:15,402 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 292 flow [2024-02-07 14:42:15,402 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 14:42:15,403 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2024-02-07 14:42:15,403 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 292 flow [2024-02-07 14:42:15,403 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 14:42:15,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:42:15,403 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:42:15,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 14:42:15,404 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:42:15,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:42:15,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1637810557, now seen corresponding path program 2 times [2024-02-07 14:42:15,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:42:15,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692709558] [2024-02-07 14:42:15,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:42:15,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:42:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:42:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:15,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:42:15,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692709558] [2024-02-07 14:42:15,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692709558] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:42:15,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291693009] [2024-02-07 14:42:15,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:42:15,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:42:15,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:42:15,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:42:15,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 14:42:15,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:42:15,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:42:15,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:42:15,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:42:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:15,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:42:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:15,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291693009] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:42:15,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:42:15,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-02-07 14:42:15,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663841068] [2024-02-07 14:42:15,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:42:15,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 14:42:15,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:42:15,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 14:42:15,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2024-02-07 14:42:15,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 14:42:15,700 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 14:42:15,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:42:15,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 14:42:15,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:42:17,532 INFO L124 PetriNetUnfolderBase]: 20219/28365 cut-off events. [2024-02-07 14:42:17,533 INFO L125 PetriNetUnfolderBase]: For 76986/76986 co-relation queries the response was YES. [2024-02-07 14:42:17,596 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 14:42:17,712 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 193 selfloop transitions, 72 changer transitions 1/275 dead transitions. [2024-02-07 14:42:17,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 275 transitions, 1826 flow [2024-02-07 14:42:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 14:42:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 14:42:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 389 transitions. [2024-02-07 14:42:17,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7524177949709865 [2024-02-07 14:42:17,714 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 292 flow. Second operand 11 states and 389 transitions. [2024-02-07 14:42:17,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 275 transitions, 1826 flow [2024-02-07 14:42:18,077 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 14:42:18,081 INFO L231 Difference]: Finished difference. Result has 69 places, 111 transitions, 1129 flow [2024-02-07 14:42:18,081 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 14:42:18,082 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2024-02-07 14:42:18,083 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 111 transitions, 1129 flow [2024-02-07 14:42:18,083 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 14:42:18,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:42:18,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:42:18,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-07 14:42:18,295 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 14:42:18,295 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread4Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:42:18,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:42:18,296 INFO L85 PathProgramCache]: Analyzing trace with hash 125486164, now seen corresponding path program 1 times [2024-02-07 14:42:18,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:42:18,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180547583] [2024-02-07 14:42:18,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:42:18,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:42:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:42:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:18,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:42:18,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180547583] [2024-02-07 14:42:18,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180547583] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:42:18,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:42:18,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:42:18,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481862066] [2024-02-07 14:42:18,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:42:18,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:42:18,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:42:18,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:42:18,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:42:18,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 14:42:18,398 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 14:42:18,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:42:18,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 14:42:18,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:42:20,864 INFO L124 PetriNetUnfolderBase]: 21347/30156 cut-off events. [2024-02-07 14:42:20,864 INFO L125 PetriNetUnfolderBase]: For 123014/123100 co-relation queries the response was YES. [2024-02-07 14:42:20,955 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 14:42:21,244 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 133 selfloop transitions, 16 changer transitions 3/161 dead transitions. [2024-02-07 14:42:21,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 161 transitions, 1692 flow [2024-02-07 14:42:21,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:42:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:42:21,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-02-07 14:42:21,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-02-07 14:42:21,245 INFO L175 Difference]: Start difference. First operand has 69 places, 111 transitions, 1129 flow. Second operand 4 states and 124 transitions. [2024-02-07 14:42:21,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 161 transitions, 1692 flow [2024-02-07 14:42:21,733 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 14:42:21,735 INFO L231 Difference]: Finished difference. Result has 74 places, 124 transitions, 1251 flow [2024-02-07 14:42:21,735 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 14:42:21,736 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 23 predicate places. [2024-02-07 14:42:21,736 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 124 transitions, 1251 flow [2024-02-07 14:42:21,736 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 14:42:21,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:42:21,736 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:42:21,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-07 14:42:21,737 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread4Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:42:21,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:42:21,738 INFO L85 PathProgramCache]: Analyzing trace with hash 317013808, now seen corresponding path program 2 times [2024-02-07 14:42:21,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:42:21,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257231269] [2024-02-07 14:42:21,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:42:21,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:42:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:42:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:21,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:42:21,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257231269] [2024-02-07 14:42:21,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257231269] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:42:21,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785891689] [2024-02-07 14:42:21,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:42:21,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:42:21,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:42:21,799 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:42:21,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 14:42:21,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:42:21,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:42:21,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:42:21,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:42:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:21,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:42:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:22,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785891689] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:42:22,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:42:22,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-02-07 14:42:22,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304996552] [2024-02-07 14:42:22,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:42:22,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 14:42:22,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:42:22,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 14:42:22,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2024-02-07 14:42:22,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 14:42:22,023 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 14:42:22,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:42:22,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 14:42:22,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:42:25,402 INFO L124 PetriNetUnfolderBase]: 28861/40867 cut-off events. [2024-02-07 14:42:25,403 INFO L125 PetriNetUnfolderBase]: For 175120/175370 co-relation queries the response was YES. [2024-02-07 14:42:25,534 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 14:42:25,824 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 207 selfloop transitions, 143 changer transitions 3/362 dead transitions. [2024-02-07 14:42:25,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 362 transitions, 3375 flow [2024-02-07 14:42:25,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 14:42:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 14:42:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 365 transitions. [2024-02-07 14:42:25,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7059961315280464 [2024-02-07 14:42:25,831 INFO L175 Difference]: Start difference. First operand has 74 places, 124 transitions, 1251 flow. Second operand 11 states and 365 transitions. [2024-02-07 14:42:25,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 362 transitions, 3375 flow [2024-02-07 14:42:26,340 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 14:42:26,343 INFO L231 Difference]: Finished difference. Result has 87 places, 204 transitions, 2657 flow [2024-02-07 14:42:26,344 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 14:42:26,344 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 36 predicate places. [2024-02-07 14:42:26,344 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 204 transitions, 2657 flow [2024-02-07 14:42:26,344 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 14:42:26,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:42:26,345 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:42:26,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-02-07 14:42:26,555 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 14:42:26,556 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:42:26,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:42:26,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1161698157, now seen corresponding path program 3 times [2024-02-07 14:42:26,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:42:26,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326279189] [2024-02-07 14:42:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:42:26,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:42:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:42:26,684 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 14:42:26,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:42:26,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326279189] [2024-02-07 14:42:26,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326279189] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:42:26,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149032657] [2024-02-07 14:42:26,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:42:26,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:42:26,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:42:26,701 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:42:26,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 14:42:26,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-02-07 14:42:26,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:42:26,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:42:26,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:42:26,924 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 14:42:26,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:42:27,115 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 14:42:27,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149032657] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:42:27,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:42:27,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-02-07 14:42:27,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869332345] [2024-02-07 14:42:27,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:42:27,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-07 14:42:27,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:42:27,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-07 14:42:27,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=274, Unknown=0, NotChecked=0, Total=506 [2024-02-07 14:42:27,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-07 14:42:27,136 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 14:42:27,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:42:27,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-07 14:42:27,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand