./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/mutex-meet/popl20-bad-dot-product.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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-bad-dot-product.wvr.c ./goblint.2024-05-07_14-17-48.files/mutex-meet/popl20-bad-dot-product.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 10:52:59,643 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 10:52:59,719 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 10:52:59,724 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 10:52:59,725 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 10:52:59,757 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 10:52:59,760 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 10:52:59,760 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 10:52:59,761 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 10:52:59,766 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 10:52:59,766 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 10:52:59,767 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 10:52:59,768 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 10:52:59,769 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 10:52:59,769 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 10:52:59,770 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 10:52:59,770 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 10:52:59,770 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 10:52:59,771 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 10:52:59,771 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 10:52:59,771 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 10:52:59,772 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 10:52:59,772 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 10:52:59,772 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 10:52:59,773 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 10:52:59,773 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 10:52:59,773 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 10:52:59,773 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 10:52:59,774 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 10:52:59,774 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 10:52:59,775 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 10:52:59,775 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 10:52:59,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:52:59,776 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 10:52:59,776 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 10:52:59,776 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 10:52:59,777 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 10:52:59,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 10:52:59,777 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 10:52:59,777 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 10:52:59,777 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 10:52:59,778 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 10:52:59,778 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 10:52:59,778 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 10:53:00,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 10:53:00,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 10:53:00,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 10:53:00,090 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 10:53:00,091 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 10:53:00,092 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/popl20-bad-dot-product.wvr.yml/witness.yml [2024-05-12 10:53:00,196 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 10:53:00,197 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 10:53:00,198 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2024-05-12 10:53:01,350 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 10:53:01,577 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 10:53:01,578 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2024-05-12 10:53:01,587 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec90af652/c5d6ff22212e49d3ac6d676ac256a33b/FLAGc5825b558 [2024-05-12 10:53:01,604 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec90af652/c5d6ff22212e49d3ac6d676ac256a33b [2024-05-12 10:53:01,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 10:53:01,607 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 10:53:01,609 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 10:53:01,609 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 10:53:01,613 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 10:53:01,614 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:53:00" (1/2) ... [2024-05-12 10:53:01,615 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ca547c1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:53:01, skipping insertion in model container [2024-05-12 10:53:01,615 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:53:00" (1/2) ... [2024-05-12 10:53:01,617 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@46b96d9e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:53:01, skipping insertion in model container [2024-05-12 10:53:01,618 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:53:01" (2/2) ... [2024-05-12 10:53:01,628 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ca547c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:53:01, skipping insertion in model container [2024-05-12 10:53:01,629 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:53:01" (2/2) ... [2024-05-12 10:53:01,629 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 10:53:01,649 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 10:53:01,650 INFO L97 edCorrectnessWitness]: Location invariant before [L100-L100] ! multithreaded || ((((((((((((4294967296LL + (long long )N) + (long long )size >= 0LL && (4294967296LL + (long long )M) + (long long )N >= 0LL) && (4294967296LL + (long long )M) + (long long )size >= 0LL) && (4294967295LL - (long long )N) + (long long )size >= 0LL) && (4294967295LL - (long long )M) + (long long )N >= 0LL) && (4294967295LL - (long long )M) + (long long )size >= 0LL) && (4294967295LL + (long long )N) - (long long )size >= 0LL) && (4294967295LL + (long long )M) - (long long )N >= 0LL) && (4294967295LL + (long long )M) - (long long )size >= 0LL) && (4294967294LL - (long long )N) - (long long )size >= 0LL) && (4294967294LL - (long long )M) - (long long )N >= 0LL) && (4294967294LL - (long long )M) - (long long )size >= 0LL) [2024-05-12 10:53:01,650 INFO L97 edCorrectnessWitness]: Location invariant before [L102-L102] ! multithreaded || ((((((((((((4294967296LL + (long long )N) + (long long )size >= 0LL && (4294967296LL + (long long )M) + (long long )N >= 0LL) && (4294967296LL + (long long )M) + (long long )size >= 0LL) && (4294967295LL - (long long )N) + (long long )size >= 0LL) && (4294967295LL - (long long )M) + (long long )N >= 0LL) && (4294967295LL - (long long )M) + (long long )size >= 0LL) && (4294967295LL + (long long )N) - (long long )size >= 0LL) && (4294967295LL + (long long )M) - (long long )N >= 0LL) && (4294967295LL + (long long )M) - (long long )size >= 0LL) && (4294967294LL - (long long )N) - (long long )size >= 0LL) && (4294967294LL - (long long )M) - (long long )N >= 0LL) && (4294967294LL - (long long )M) - (long long )size >= 0LL) [2024-05-12 10:53:01,650 INFO L97 edCorrectnessWitness]: Location invariant before [L101-L101] ! multithreaded || ((((((((((((4294967296LL + (long long )N) + (long long )size >= 0LL && (4294967296LL + (long long )M) + (long long )N >= 0LL) && (4294967296LL + (long long )M) + (long long )size >= 0LL) && (4294967295LL - (long long )N) + (long long )size >= 0LL) && (4294967295LL - (long long )M) + (long long )N >= 0LL) && (4294967295LL - (long long )M) + (long long )size >= 0LL) && (4294967295LL + (long long )N) - (long long )size >= 0LL) && (4294967295LL + (long long )M) - (long long )N >= 0LL) && (4294967295LL + (long long )M) - (long long )size >= 0LL) && (4294967294LL - (long long )N) - (long long )size >= 0LL) && (4294967294LL - (long long )M) - (long long )N >= 0LL) && (4294967294LL - (long long )M) - (long long )size >= 0LL) [2024-05-12 10:53:01,651 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 10:53:01,651 INFO L106 edCorrectnessWitness]: ghost_update [L99-L99] multithreaded = 1; [2024-05-12 10:53:01,675 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 10:53:01,897 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c[2865,2878] [2024-05-12 10:53:01,912 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:53:01,921 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 10:53:02,004 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c[2865,2878] [2024-05-12 10:53:02,008 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:53:02,024 INFO L206 MainTranslator]: Completed translation [2024-05-12 10:53:02,024 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:53:02 WrapperNode [2024-05-12 10:53:02,024 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 10:53:02,025 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 10:53:02,026 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 10:53:02,026 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 10:53:02,032 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:53:02" (1/1) ... [2024-05-12 10:53:02,051 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:53:02" (1/1) ... [2024-05-12 10:53:02,093 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 293 [2024-05-12 10:53:02,095 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 10:53:02,096 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 10:53:02,096 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 10:53:02,096 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 10:53:02,106 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:53:02" (1/1) ... [2024-05-12 10:53:02,106 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:53:02" (1/1) ... [2024-05-12 10:53:02,113 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:53:02" (1/1) ... [2024-05-12 10:53:02,141 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 11, 2, 2, 2]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 5 writes are split as follows [0, 2, 1, 1, 1]. [2024-05-12 10:53:02,142 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:53:02" (1/1) ... [2024-05-12 10:53:02,142 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:53:02" (1/1) ... [2024-05-12 10:53:02,151 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:53:02" (1/1) ... [2024-05-12 10:53:02,165 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:53:02" (1/1) ... [2024-05-12 10:53:02,167 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:53:02" (1/1) ... [2024-05-12 10:53:02,173 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:53:02" (1/1) ... [2024-05-12 10:53:02,176 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 10:53:02,180 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 10:53:02,180 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 10:53:02,180 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 10:53:02,181 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:53:02" (1/1) ... [2024-05-12 10:53:02,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:53:02,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:53:02,206 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) [2024-05-12 10:53:02,215 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 [2024-05-12 10:53:02,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 10:53:02,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 10:53:02,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 10:53:02,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 10:53:02,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 10:53:02,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 10:53:02,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-05-12 10:53:02,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-05-12 10:53:02,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-05-12 10:53:02,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-05-12 10:53:02,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-05-12 10:53:02,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-05-12 10:53:02,242 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-05-12 10:53:02,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-05-12 10:53:02,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-05-12 10:53:02,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-05-12 10:53:02,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-05-12 10:53:02,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-05-12 10:53:02,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 10:53:02,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 10:53:02,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 10:53:02,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 10:53:02,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-05-12 10:53:02,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 10:53:02,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 10:53:02,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-05-12 10:53:02,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 10:53:02,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 10:53:02,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 10:53:02,247 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 10:53:02,363 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 10:53:02,365 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 10:53:02,807 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 10:53:02,807 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 10:53:03,155 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 10:53:03,155 INFO L320 CfgBuilder]: Removed 8 assume(true) statements. [2024-05-12 10:53:03,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:53:03 BoogieIcfgContainer [2024-05-12 10:53:03,156 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 10:53:03,158 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 10:53:03,159 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 10:53:03,161 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 10:53:03,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:53:00" (1/4) ... [2024-05-12 10:53:03,163 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@492942eb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:53:03, skipping insertion in model container [2024-05-12 10:53:03,163 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 10:53:01" (2/4) ... [2024-05-12 10:53:03,163 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@492942eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:53:03, skipping insertion in model container [2024-05-12 10:53:03,163 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:53:02" (3/4) ... [2024-05-12 10:53:03,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@492942eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:53:03, skipping insertion in model container [2024-05-12 10:53:03,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:53:03" (4/4) ... [2024-05-12 10:53:03,166 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2024-05-12 10:53:03,183 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 10:53:03,183 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-05-12 10:53:03,183 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 10:53:03,243 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-05-12 10:53:03,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 60 transitions, 141 flow [2024-05-12 10:53:03,303 INFO L124 PetriNetUnfolderBase]: 11/57 cut-off events. [2024-05-12 10:53:03,303 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-05-12 10:53:03,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 11/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 100 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-05-12 10:53:03,307 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 60 transitions, 141 flow [2024-05-12 10:53:03,311 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 56 transitions, 130 flow [2024-05-12 10:53:03,327 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 10:53:03,334 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;@57fc40dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 10:53:03,334 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-05-12 10:53:03,339 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 10:53:03,340 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2024-05-12 10:53:03,340 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:53:03,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:53:03,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:53:03,341 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:53:03,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:53:03,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1397062844, now seen corresponding path program 1 times [2024-05-12 10:53:03,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:53:03,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529971056] [2024-05-12 10:53:03,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:03,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:53:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:53:04,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:53:04,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529971056] [2024-05-12 10:53:04,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529971056] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:53:04,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:53:04,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:53:04,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570111018] [2024-05-12 10:53:04,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:53:04,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:53:04,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:53:04,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:53:04,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:53:04,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 60 [2024-05-12 10:53:04,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:53:04,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:53:04,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 60 [2024-05-12 10:53:04,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:53:04,994 INFO L124 PetriNetUnfolderBase]: 4129/5487 cut-off events. [2024-05-12 10:53:04,995 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2024-05-12 10:53:05,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11067 conditions, 5487 events. 4129/5487 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 25576 event pairs, 2635 based on Foata normal form. 503/4449 useless extension candidates. Maximal degree in co-relation 10218. Up to 5400 conditions per place. [2024-05-12 10:53:05,027 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 41 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2024-05-12 10:53:05,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 50 transitions, 204 flow [2024-05-12 10:53:05,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:53:05,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:53:05,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-05-12 10:53:05,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37083333333333335 [2024-05-12 10:53:05,040 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 130 flow. Second operand 4 states and 89 transitions. [2024-05-12 10:53:05,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 50 transitions, 204 flow [2024-05-12 10:53:05,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 192 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 10:53:05,047 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 110 flow [2024-05-12 10:53:05,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=49, PETRI_TRANSITIONS=50} [2024-05-12 10:53:05,051 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -6 predicate places. [2024-05-12 10:53:05,052 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 110 flow [2024-05-12 10:53:05,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:53:05,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:53:05,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:53:05,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 10:53:05,053 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:53:05,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:53:05,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1733204896, now seen corresponding path program 1 times [2024-05-12 10:53:05,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:53:05,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536464721] [2024-05-12 10:53:05,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:05,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:53:05,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:53:05,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:53:05,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536464721] [2024-05-12 10:53:05,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536464721] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:53:05,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:53:05,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:53:05,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404668584] [2024-05-12 10:53:05,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:53:05,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 10:53:05,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:53:05,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 10:53:05,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 10:53:05,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 60 [2024-05-12 10:53:05,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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) [2024-05-12 10:53:05,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:53:05,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 60 [2024-05-12 10:53:05,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:53:06,081 INFO L124 PetriNetUnfolderBase]: 7011/9407 cut-off events. [2024-05-12 10:53:06,083 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-05-12 10:53:06,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18650 conditions, 9407 events. 7011/9407 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 48303 event pairs, 1670 based on Foata normal form. 1/6725 useless extension candidates. Maximal degree in co-relation 18635. Up to 5946 conditions per place. [2024-05-12 10:53:06,136 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 69 selfloop transitions, 4 changer transitions 1/81 dead transitions. [2024-05-12 10:53:06,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 81 transitions, 325 flow [2024-05-12 10:53:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 10:53:06,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 10:53:06,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2024-05-12 10:53:06,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-05-12 10:53:06,145 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 110 flow. Second operand 3 states and 114 transitions. [2024-05-12 10:53:06,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 81 transitions, 325 flow [2024-05-12 10:53:06,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 81 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 10:53:06,148 INFO L231 Difference]: Finished difference. Result has 50 places, 53 transitions, 133 flow [2024-05-12 10:53:06,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=50, PETRI_TRANSITIONS=53} [2024-05-12 10:53:06,149 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -5 predicate places. [2024-05-12 10:53:06,149 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 53 transitions, 133 flow [2024-05-12 10:53:06,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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) [2024-05-12 10:53:06,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:53:06,150 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:53:06,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 10:53:06,151 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:53:06,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:53:06,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1055457602, now seen corresponding path program 1 times [2024-05-12 10:53:06,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:53:06,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956988323] [2024-05-12 10:53:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:06,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:53:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 10:53:06,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:53:06,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956988323] [2024-05-12 10:53:06,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956988323] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:53:06,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:53:06,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:53:06,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120573143] [2024-05-12 10:53:06,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:53:06,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:53:06,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:53:06,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:53:06,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:53:06,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 60 [2024-05-12 10:53:06,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 53 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-05-12 10:53:06,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:53:06,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 60 [2024-05-12 10:53:06,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:53:07,206 INFO L124 PetriNetUnfolderBase]: 6991/9297 cut-off events. [2024-05-12 10:53:07,206 INFO L125 PetriNetUnfolderBase]: For 731/731 co-relation queries the response was YES. [2024-05-12 10:53:07,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19789 conditions, 9297 events. 6991/9297 cut-off events. For 731/731 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 46895 event pairs, 4298 based on Foata normal form. 0/6597 useless extension candidates. Maximal degree in co-relation 19765. Up to 9116 conditions per place. [2024-05-12 10:53:07,257 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 45 selfloop transitions, 2 changer transitions 3/57 dead transitions. [2024-05-12 10:53:07,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 241 flow [2024-05-12 10:53:07,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:53:07,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:53:07,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-05-12 10:53:07,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-05-12 10:53:07,261 INFO L175 Difference]: Start difference. First operand has 50 places, 53 transitions, 133 flow. Second operand 5 states and 114 transitions. [2024-05-12 10:53:07,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 241 flow [2024-05-12 10:53:07,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 57 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 10:53:07,264 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 147 flow [2024-05-12 10:53:07,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-05-12 10:53:07,266 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 1 predicate places. [2024-05-12 10:53:07,266 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 147 flow [2024-05-12 10:53:07,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-05-12 10:53:07,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:53:07,267 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:53:07,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 10:53:07,267 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:53:07,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:53:07,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1606881531, now seen corresponding path program 1 times [2024-05-12 10:53:07,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:53:07,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315909947] [2024-05-12 10:53:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:07,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:53:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 10:53:07,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:53:07,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315909947] [2024-05-12 10:53:07,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315909947] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:53:07,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:53:07,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:53:07,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664201541] [2024-05-12 10:53:07,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:53:07,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:53:07,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:53:07,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:53:07,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:53:07,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 60 [2024-05-12 10:53:07,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:53:07,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:53:07,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 60 [2024-05-12 10:53:07,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:53:08,347 INFO L124 PetriNetUnfolderBase]: 7751/10533 cut-off events. [2024-05-12 10:53:08,348 INFO L125 PetriNetUnfolderBase]: For 694/694 co-relation queries the response was YES. [2024-05-12 10:53:08,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21828 conditions, 10533 events. 7751/10533 cut-off events. For 694/694 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 56481 event pairs, 2120 based on Foata normal form. 0/7871 useless extension candidates. Maximal degree in co-relation 21813. Up to 5963 conditions per place. [2024-05-12 10:53:08,398 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 67 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2024-05-12 10:53:08,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 77 transitions, 345 flow [2024-05-12 10:53:08,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:53:08,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:53:08,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-05-12 10:53:08,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-05-12 10:53:08,401 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 147 flow. Second operand 4 states and 114 transitions. [2024-05-12 10:53:08,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 77 transitions, 345 flow [2024-05-12 10:53:08,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 77 transitions, 335 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-05-12 10:53:08,408 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 158 flow [2024-05-12 10:53:08,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2024-05-12 10:53:08,410 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 1 predicate places. [2024-05-12 10:53:08,410 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 158 flow [2024-05-12 10:53:08,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:53:08,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:53:08,410 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:53:08,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 10:53:08,411 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:53:08,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:53:08,411 INFO L85 PathProgramCache]: Analyzing trace with hash 331513937, now seen corresponding path program 1 times [2024-05-12 10:53:08,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:53:08,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475278818] [2024-05-12 10:53:08,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:08,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:53:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 10:53:08,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:53:08,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475278818] [2024-05-12 10:53:08,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475278818] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:53:08,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892094943] [2024-05-12 10:53:08,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:08,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:53:08,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:53:08,562 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) [2024-05-12 10:53:08,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-05-12 10:53:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:08,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 6 conjunts are in the unsatisfiable core [2024-05-12 10:53:08,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:53:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 10:53:08,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:53:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 10:53:08,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892094943] provided 1 perfect and 1 imperfect interpolant sequences [2024-05-12 10:53:08,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-05-12 10:53:08,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-05-12 10:53:08,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333145525] [2024-05-12 10:53:08,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:53:08,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:53:08,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:53:08,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:53:08,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:53:08,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 60 [2024-05-12 10:53:08,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 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) [2024-05-12 10:53:08,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:53:08,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 60 [2024-05-12 10:53:08,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:53:09,758 INFO L124 PetriNetUnfolderBase]: 7451/10155 cut-off events. [2024-05-12 10:53:09,759 INFO L125 PetriNetUnfolderBase]: For 1616/2216 co-relation queries the response was YES. [2024-05-12 10:53:09,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23134 conditions, 10155 events. 7451/10155 cut-off events. For 1616/2216 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 51788 event pairs, 3250 based on Foata normal form. 600/8693 useless extension candidates. Maximal degree in co-relation 23115. Up to 6005 conditions per place. [2024-05-12 10:53:09,812 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 70 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2024-05-12 10:53:09,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 81 transitions, 382 flow [2024-05-12 10:53:09,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:53:09,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:53:09,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-05-12 10:53:09,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-05-12 10:53:09,814 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 158 flow. Second operand 5 states and 129 transitions. [2024-05-12 10:53:09,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 81 transitions, 382 flow [2024-05-12 10:53:09,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 81 transitions, 376 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 10:53:09,838 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 177 flow [2024-05-12 10:53:09,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-05-12 10:53:09,841 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2024-05-12 10:53:09,841 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 177 flow [2024-05-12 10:53:09,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 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) [2024-05-12 10:53:09,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:53:09,842 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:53:09,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-05-12 10:53:10,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:53:10,056 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:53:10,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:53:10,057 INFO L85 PathProgramCache]: Analyzing trace with hash 573607219, now seen corresponding path program 1 times [2024-05-12 10:53:10,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:53:10,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710620032] [2024-05-12 10:53:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:10,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:53:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 10:53:10,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:53:10,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710620032] [2024-05-12 10:53:10,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710620032] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:53:10,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:53:10,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:53:10,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513467265] [2024-05-12 10:53:10,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:53:10,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:53:10,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:53:10,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:53:10,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:53:10,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 60 [2024-05-12 10:53:10,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 177 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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) [2024-05-12 10:53:10,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:53:10,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 60 [2024-05-12 10:53:10,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:53:12,243 INFO L124 PetriNetUnfolderBase]: 14865/20186 cut-off events. [2024-05-12 10:53:12,243 INFO L125 PetriNetUnfolderBase]: For 9026/10100 co-relation queries the response was YES. [2024-05-12 10:53:12,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50083 conditions, 20186 events. 14865/20186 cut-off events. For 9026/10100 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 114570 event pairs, 8448 based on Foata normal form. 1074/17988 useless extension candidates. Maximal degree in co-relation 50060. Up to 11097 conditions per place. [2024-05-12 10:53:12,365 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 136 selfloop transitions, 8 changer transitions 0/149 dead transitions. [2024-05-12 10:53:12,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 149 transitions, 736 flow [2024-05-12 10:53:12,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:53:12,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:53:12,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-05-12 10:53:12,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-05-12 10:53:12,369 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 177 flow. Second operand 6 states and 195 transitions. [2024-05-12 10:53:12,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 149 transitions, 736 flow [2024-05-12 10:53:12,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 149 transitions, 727 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 10:53:12,400 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 242 flow [2024-05-12 10:53:12,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=242, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-05-12 10:53:12,403 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2024-05-12 10:53:12,403 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 242 flow [2024-05-12 10:53:12,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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) [2024-05-12 10:53:12,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:53:12,404 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:53:12,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 10:53:12,405 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:53:12,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:53:12,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1219485629, now seen corresponding path program 1 times [2024-05-12 10:53:12,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:53:12,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976098411] [2024-05-12 10:53:12,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:12,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:53:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 10:53:12,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:53:12,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976098411] [2024-05-12 10:53:12,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976098411] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:53:12,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:53:12,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:53:12,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759106443] [2024-05-12 10:53:12,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:53:12,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:53:12,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:53:12,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:53:12,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:53:12,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 60 [2024-05-12 10:53:12,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 242 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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) [2024-05-12 10:53:12,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:53:12,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 60 [2024-05-12 10:53:12,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:53:14,197 INFO L124 PetriNetUnfolderBase]: 12783/17278 cut-off events. [2024-05-12 10:53:14,197 INFO L125 PetriNetUnfolderBase]: For 15973/17567 co-relation queries the response was YES. [2024-05-12 10:53:14,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46474 conditions, 17278 events. 12783/17278 cut-off events. For 15973/17567 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 94060 event pairs, 7737 based on Foata normal form. 1594/16325 useless extension candidates. Maximal degree in co-relation 46447. Up to 11021 conditions per place. [2024-05-12 10:53:14,293 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 120 selfloop transitions, 8 changer transitions 0/134 dead transitions. [2024-05-12 10:53:14,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 134 transitions, 731 flow [2024-05-12 10:53:14,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:53:14,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:53:14,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-05-12 10:53:14,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055555555555555 [2024-05-12 10:53:14,295 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 242 flow. Second operand 6 states and 182 transitions. [2024-05-12 10:53:14,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 134 transitions, 731 flow [2024-05-12 10:53:14,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 134 transitions, 727 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-05-12 10:53:14,323 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 295 flow [2024-05-12 10:53:14,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-05-12 10:53:14,324 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-05-12 10:53:14,324 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 295 flow [2024-05-12 10:53:14,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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) [2024-05-12 10:53:14,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:53:14,325 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:53:14,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 10:53:14,325 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:53:14,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:53:14,325 INFO L85 PathProgramCache]: Analyzing trace with hash -581762260, now seen corresponding path program 1 times [2024-05-12 10:53:14,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:53:14,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604317177] [2024-05-12 10:53:14,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:14,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:53:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 10:53:14,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:53:14,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604317177] [2024-05-12 10:53:14,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604317177] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:53:14,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834562372] [2024-05-12 10:53:14,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:14,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:53:14,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:53:14,536 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) [2024-05-12 10:53:14,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-05-12 10:53:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:14,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 9 conjunts are in the unsatisfiable core [2024-05-12 10:53:14,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:53:14,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2024-05-12 10:53:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 10:53:14,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:53:14,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2024-05-12 10:53:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 10:53:14,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834562372] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:53:14,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:53:14,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-05-12 10:53:14,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793592046] [2024-05-12 10:53:14,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:53:14,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-05-12 10:53:14,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:53:14,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-05-12 10:53:14,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-05-12 10:53:14,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 60 [2024-05-12 10:53:14,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 295 flow. Second operand has 15 states, 15 states have (on average 14.266666666666667) internal successors, (214), 15 states have internal predecessors, (214), 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) [2024-05-12 10:53:14,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:53:14,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 60 [2024-05-12 10:53:14,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:53:17,171 INFO L124 PetriNetUnfolderBase]: 19413/26505 cut-off events. [2024-05-12 10:53:17,171 INFO L125 PetriNetUnfolderBase]: For 26171/27982 co-relation queries the response was YES. [2024-05-12 10:53:17,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75712 conditions, 26505 events. 19413/26505 cut-off events. For 26171/27982 co-relation queries the response was YES. Maximal size of possible extension queue 1008. Compared 156892 event pairs, 10453 based on Foata normal form. 1811/24341 useless extension candidates. Maximal degree in co-relation 75681. Up to 11097 conditions per place. [2024-05-12 10:53:17,336 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 148 selfloop transitions, 15 changer transitions 0/169 dead transitions. [2024-05-12 10:53:17,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 169 transitions, 997 flow [2024-05-12 10:53:17,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:53:17,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:53:17,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-05-12 10:53:17,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-05-12 10:53:17,339 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 295 flow. Second operand 7 states and 208 transitions. [2024-05-12 10:53:17,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 169 transitions, 997 flow [2024-05-12 10:53:17,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 169 transitions, 992 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 10:53:17,460 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 400 flow [2024-05-12 10:53:17,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=400, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2024-05-12 10:53:17,462 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2024-05-12 10:53:17,463 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 400 flow [2024-05-12 10:53:17,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.266666666666667) internal successors, (214), 15 states have internal predecessors, (214), 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) [2024-05-12 10:53:17,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:53:17,463 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:53:17,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-05-12 10:53:17,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-05-12 10:53:17,680 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:53:17,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:53:17,681 INFO L85 PathProgramCache]: Analyzing trace with hash 725073058, now seen corresponding path program 1 times [2024-05-12 10:53:17,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:53:17,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659079598] [2024-05-12 10:53:17,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:17,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:53:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 10:53:17,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:53:17,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659079598] [2024-05-12 10:53:17,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659079598] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:53:17,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721017152] [2024-05-12 10:53:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:17,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:53:17,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:53:17,892 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) [2024-05-12 10:53:17,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-05-12 10:53:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:18,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 9 conjunts are in the unsatisfiable core [2024-05-12 10:53:18,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:53:18,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2024-05-12 10:53:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 10:53:18,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:53:18,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2024-05-12 10:53:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 10:53:18,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721017152] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:53:18,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:53:18,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-05-12 10:53:18,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857271006] [2024-05-12 10:53:18,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:53:18,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-05-12 10:53:18,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:53:18,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-05-12 10:53:18,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-05-12 10:53:18,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 60 [2024-05-12 10:53:18,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 400 flow. Second operand has 15 states, 15 states have (on average 14.266666666666667) internal successors, (214), 15 states have internal predecessors, (214), 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) [2024-05-12 10:53:18,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:53:18,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 60 [2024-05-12 10:53:18,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:53:21,032 INFO L124 PetriNetUnfolderBase]: 17276/23495 cut-off events. [2024-05-12 10:53:21,036 INFO L125 PetriNetUnfolderBase]: For 49026/51774 co-relation queries the response was YES. [2024-05-12 10:53:21,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74424 conditions, 23495 events. 17276/23495 cut-off events. For 49026/51774 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 134943 event pairs, 9761 based on Foata normal form. 2748/23021 useless extension candidates. Maximal degree in co-relation 74389. Up to 11021 conditions per place. [2024-05-12 10:53:21,175 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 132 selfloop transitions, 15 changer transitions 0/154 dead transitions. [2024-05-12 10:53:21,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 154 transitions, 1049 flow [2024-05-12 10:53:21,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:53:21,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:53:21,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-05-12 10:53:21,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-05-12 10:53:21,178 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 400 flow. Second operand 7 states and 195 transitions. [2024-05-12 10:53:21,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 154 transitions, 1049 flow [2024-05-12 10:53:21,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 154 transitions, 1026 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-05-12 10:53:21,363 INFO L231 Difference]: Finished difference. Result has 88 places, 80 transitions, 469 flow [2024-05-12 10:53:21,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=469, PETRI_PLACES=88, PETRI_TRANSITIONS=80} [2024-05-12 10:53:21,364 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 33 predicate places. [2024-05-12 10:53:21,364 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 80 transitions, 469 flow [2024-05-12 10:53:21,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.266666666666667) internal successors, (214), 15 states have internal predecessors, (214), 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) [2024-05-12 10:53:21,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:53:21,365 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:53:21,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-05-12 10:53:21,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:53:21,580 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:53:21,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:53:21,581 INFO L85 PathProgramCache]: Analyzing trace with hash -488240467, now seen corresponding path program 2 times [2024-05-12 10:53:21,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:53:21,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156326977] [2024-05-12 10:53:21,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:21,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:53:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:53:22,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:53:22,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156326977] [2024-05-12 10:53:22,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156326977] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:53:22,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790843496] [2024-05-12 10:53:22,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 10:53:22,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:53:22,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:53:22,492 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 10:53:22,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-05-12 10:53:22,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 10:53:22,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:53:22,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 21 conjunts are in the unsatisfiable core [2024-05-12 10:53:22,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:53:23,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-05-12 10:53:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 10:53:23,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:53:23,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-05-12 10:53:23,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2024-05-12 10:53:23,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 10:53:23,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790843496] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:53:23,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:53:23,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 37 [2024-05-12 10:53:23,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409790713] [2024-05-12 10:53:23,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:53:23,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-05-12 10:53:23,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:53:23,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-05-12 10:53:23,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2024-05-12 10:53:23,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 60 [2024-05-12 10:53:23,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 80 transitions, 469 flow. Second operand has 38 states, 38 states have (on average 11.657894736842104) internal successors, (443), 38 states have internal predecessors, (443), 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) [2024-05-12 10:53:23,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:53:23,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 60 [2024-05-12 10:53:23,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:53:40,054 INFO L124 PetriNetUnfolderBase]: 103228/138271 cut-off events. [2024-05-12 10:53:40,055 INFO L125 PetriNetUnfolderBase]: For 195908/195908 co-relation queries the response was YES. [2024-05-12 10:53:40,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428687 conditions, 138271 events. 103228/138271 cut-off events. For 195908/195908 co-relation queries the response was YES. Maximal size of possible extension queue 3917. Compared 916548 event pairs, 37773 based on Foata normal form. 0/117530 useless extension candidates. Maximal degree in co-relation 329400. Up to 30725 conditions per place. [2024-05-12 10:53:41,100 INFO L140 encePairwiseOnDemand]: 41/60 looper letters, 907 selfloop transitions, 109 changer transitions 0/1019 dead transitions. [2024-05-12 10:53:41,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 1019 transitions, 6313 flow [2024-05-12 10:53:41,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-05-12 10:53:41,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-05-12 10:53:41,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 1281 transitions. [2024-05-12 10:53:41,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48522727272727273 [2024-05-12 10:53:41,125 INFO L175 Difference]: Start difference. First operand has 88 places, 80 transitions, 469 flow. Second operand 44 states and 1281 transitions. [2024-05-12 10:53:41,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 1019 transitions, 6313 flow [2024-05-12 10:53:48,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 1019 transitions, 6007 flow, removed 145 selfloop flow, removed 3 redundant places. [2024-05-12 10:53:48,061 INFO L231 Difference]: Finished difference. Result has 165 places, 187 transitions, 1653 flow [2024-05-12 10:53:48,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1653, PETRI_PLACES=165, PETRI_TRANSITIONS=187} [2024-05-12 10:53:48,062 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 110 predicate places. [2024-05-12 10:53:48,062 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 187 transitions, 1653 flow [2024-05-12 10:53:48,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 11.657894736842104) internal successors, (443), 38 states have internal predecessors, (443), 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) [2024-05-12 10:53:48,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:53:48,063 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:53:48,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-05-12 10:53:48,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:53:48,263 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:53:48,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:53:48,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1715830995, now seen corresponding path program 2 times [2024-05-12 10:53:48,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:53:48,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972618455] [2024-05-12 10:53:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:48,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:53:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:53:48,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:53:48,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972618455] [2024-05-12 10:53:48,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972618455] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:53:48,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308039168] [2024-05-12 10:53:48,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 10:53:48,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:53:48,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:53:48,997 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 10:53:48,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-05-12 10:53:49,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 10:53:49,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:53:49,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 21 conjunts are in the unsatisfiable core [2024-05-12 10:53:49,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:53:49,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-05-12 10:53:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 10:53:49,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:53:49,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-05-12 10:53:49,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2024-05-12 10:53:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 10:53:49,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308039168] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:53:49,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:53:49,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 36 [2024-05-12 10:53:49,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508243520] [2024-05-12 10:53:49,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:53:49,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-05-12 10:53:49,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:53:49,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-05-12 10:53:49,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2024-05-12 10:53:50,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 60 [2024-05-12 10:53:50,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 187 transitions, 1653 flow. Second operand has 37 states, 37 states have (on average 11.513513513513514) internal successors, (426), 37 states have internal predecessors, (426), 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) [2024-05-12 10:53:50,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:53:50,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 60 [2024-05-12 10:53:50,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand