./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longest-2.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/stack_longest-2.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 958ec4d9 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/stack_longest-2.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/stack_longest-2.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-958ec4d-m [2024-02-07 14:21:15,211 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:21:15,274 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:21:15,284 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:21:15,284 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:21:15,313 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:21:15,313 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:21:15,314 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:21:15,314 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:21:15,317 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:21:15,317 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:21:15,318 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:21:15,318 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:21:15,319 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:21:15,319 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:21:15,320 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:21:15,320 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:21:15,320 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:21:15,320 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:21:15,321 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:21:15,321 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:21:15,321 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:21:15,321 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:21:15,321 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:21:15,322 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:21:15,322 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:21:15,322 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:21:15,322 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:21:15,323 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:21:15,323 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:21:15,324 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:21:15,324 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:21:15,324 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:21:15,324 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:21:15,324 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:21:15,324 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:21:15,325 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:21:15,325 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:21:15,325 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:21:15,325 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:21:15,325 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:21:15,326 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:21:15,326 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:21:15,326 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:21:15,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:21:15,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:21:15,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:21:15,551 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:21:15,557 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:21:15,558 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/stack_longest-2.yml/witness.yml [2024-02-07 14:21:15,644 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:21:15,644 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:21:15,646 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2024-02-07 14:21:16,648 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:21:16,911 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:21:16,911 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2024-02-07 14:21:16,928 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1593366b/256f07c973f94ef6ae1f5d64b1b76bf0/FLAG4cd141fe8 [2024-02-07 14:21:16,941 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1593366b/256f07c973f94ef6ae1f5d64b1b76bf0 [2024-02-07 14:21:16,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:21:16,943 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:21:16,945 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:21:16,946 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:21:16,949 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:21:16,950 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:21:15" (1/2) ... [2024-02-07 14:21:16,951 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7df10b44 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:21:16, skipping insertion in model container [2024-02-07 14:21:16,951 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:21:15" (1/2) ... [2024-02-07 14:21:16,952 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2f2513ae and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:21:16, skipping insertion in model container [2024-02-07 14:21:16,952 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:21:16" (2/2) ... [2024-02-07 14:21:16,952 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7df10b44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:16, skipping insertion in model container [2024-02-07 14:21:16,953 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:21:16" (2/2) ... [2024-02-07 14:21:16,953 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:21:16,957 INFO L71 edCorrectnessWitness]: Witness did not contain any usable entries. [2024-02-07 14:21:16,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:21:17,352 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] [2024-02-07 14:21:17,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:21:17,395 INFO L203 MainTranslator]: Completed pre-run [2024-02-07 14:21:17,445 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] [2024-02-07 14:21:17,451 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:21:17,509 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:21:17,510 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:17 WrapperNode [2024-02-07 14:21:17,510 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:21:17,511 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:21:17,511 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:21:17,511 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:21:17,516 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:17" (1/1) ... [2024-02-07 14:21:17,532 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:17" (1/1) ... [2024-02-07 14:21:17,550 INFO L138 Inliner]: procedures = 278, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 156 [2024-02-07 14:21:17,551 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:21:17,551 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:21:17,551 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:21:17,551 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:21:17,578 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:17" (1/1) ... [2024-02-07 14:21:17,578 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:17" (1/1) ... [2024-02-07 14:21:17,580 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:17" (1/1) ... [2024-02-07 14:21:17,601 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 5, 2, 3, 2]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0, 0]. The 4 writes are split as follows [0, 0, 1, 2, 1]. [2024-02-07 14:21:17,602 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:17" (1/1) ... [2024-02-07 14:21:17,602 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:17" (1/1) ... [2024-02-07 14:21:17,607 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:17" (1/1) ... [2024-02-07 14:21:17,609 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:17" (1/1) ... [2024-02-07 14:21:17,611 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:17" (1/1) ... [2024-02-07 14:21:17,612 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:17" (1/1) ... [2024-02-07 14:21:17,614 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:21:17,615 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:21:17,615 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:21:17,615 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:21:17,615 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:17" (1/1) ... [2024-02-07 14:21:17,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:21:17,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:17,658 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-07 14:21:17,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-07 14:21:17,700 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-02-07 14:21:17,700 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-02-07 14:21:17,700 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-02-07 14:21:17,701 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-02-07 14:21:17,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:21:17,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:21:17,701 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-07 14:21:17,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:21:17,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:21:17,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:21:17,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 14:21:17,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-07 14:21:17,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:21:17,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:21:17,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:21:17,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 14:21:17,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-07 14:21:17,703 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-07 14:21:17,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:21:17,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:21:17,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:21:17,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:21:17,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 14:21:17,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-07 14:21:17,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:21:17,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:21:17,705 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 14:21:17,824 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:21:17,825 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:21:18,008 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:21:18,008 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:21:18,183 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:21:18,183 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-07 14:21:18,184 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:21:18 BoogieIcfgContainer [2024-02-07 14:21:18,184 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:21:18,185 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:21:18,187 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:21:18,189 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:21:18,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:21:15" (1/4) ... [2024-02-07 14:21:18,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a49137 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:21:18, skipping insertion in model container [2024-02-07 14:21:18,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:21:16" (2/4) ... [2024-02-07 14:21:18,191 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a49137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:21:18, skipping insertion in model container [2024-02-07 14:21:18,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:17" (3/4) ... [2024-02-07 14:21:18,191 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a49137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:21:18, skipping insertion in model container [2024-02-07 14:21:18,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:21:18" (4/4) ... [2024-02-07 14:21:18,192 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2024-02-07 14:21:18,205 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:21:18,206 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-02-07 14:21:18,206 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:21:18,261 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 14:21:18,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 35 transitions, 84 flow [2024-02-07 14:21:18,311 INFO L124 PetriNetUnfolderBase]: 5/33 cut-off events. [2024-02-07 14:21:18,312 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 14:21:18,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 5/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 61 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2024-02-07 14:21:18,314 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 35 transitions, 84 flow [2024-02-07 14:21:18,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 31 transitions, 71 flow [2024-02-07 14:21:18,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:21:18,336 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;@22cdef7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:21:18,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-02-07 14:21:18,351 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:21:18,351 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-02-07 14:21:18,351 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 14:21:18,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:18,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:18,353 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-07 14:21:18,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:18,357 INFO L85 PathProgramCache]: Analyzing trace with hash -28897917, now seen corresponding path program 1 times [2024-02-07 14:21:18,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:18,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395177323] [2024-02-07 14:21:18,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:18,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:18,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:18,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:18,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395177323] [2024-02-07 14:21:18,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395177323] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:18,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:18,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:21:18,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151821420] [2024-02-07 14:21:18,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:18,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:18,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:18,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:18,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:21:18,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-02-07 14:21:18,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:18,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:18,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-02-07 14:21:18,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:19,000 INFO L124 PetriNetUnfolderBase]: 321/604 cut-off events. [2024-02-07 14:21:19,000 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-02-07 14:21:19,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1187 conditions, 604 events. 321/604 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2742 event pairs, 57 based on Foata normal form. 45/610 useless extension candidates. Maximal degree in co-relation 1056. Up to 375 conditions per place. [2024-02-07 14:21:19,010 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 42 selfloop transitions, 3 changer transitions 3/54 dead transitions. [2024-02-07 14:21:19,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 54 transitions, 222 flow [2024-02-07 14:21:19,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:21:19,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:21:19,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-02-07 14:21:19,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-02-07 14:21:19,023 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 71 flow. Second operand 4 states and 85 transitions. [2024-02-07 14:21:19,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 54 transitions, 222 flow [2024-02-07 14:21:19,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 54 transitions, 213 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 14:21:19,029 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 84 flow [2024-02-07 14:21:19,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2024-02-07 14:21:19,034 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2024-02-07 14:21:19,034 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 84 flow [2024-02-07 14:21:19,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:19,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:19,035 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:19,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:21:19,035 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-07 14:21:19,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:19,036 INFO L85 PathProgramCache]: Analyzing trace with hash 994745822, now seen corresponding path program 1 times [2024-02-07 14:21:19,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:19,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605311575] [2024-02-07 14:21:19,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:19,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:19,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:19,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605311575] [2024-02-07 14:21:19,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605311575] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:19,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113077263] [2024-02-07 14:21:19,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:19,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:19,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:19,333 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:21:19,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 14:21:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:19,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 14:21:19,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:19,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-07 14:21:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:19,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:21:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:19,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113077263] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:21:19,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:21:19,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-02-07 14:21:19,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176086883] [2024-02-07 14:21:19,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:21:19,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:21:19,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:19,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:21:19,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:21:19,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 14:21:19,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 84 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:19,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:19,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 14:21:19,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:20,240 INFO L124 PetriNetUnfolderBase]: 1316/2439 cut-off events. [2024-02-07 14:21:20,240 INFO L125 PetriNetUnfolderBase]: For 275/277 co-relation queries the response was YES. [2024-02-07 14:21:20,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5145 conditions, 2439 events. 1316/2439 cut-off events. For 275/277 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 12722 event pairs, 140 based on Foata normal form. 52/2385 useless extension candidates. Maximal degree in co-relation 4556. Up to 377 conditions per place. [2024-02-07 14:21:20,251 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 170 selfloop transitions, 30 changer transitions 6/211 dead transitions. [2024-02-07 14:21:20,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 211 transitions, 928 flow [2024-02-07 14:21:20,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-07 14:21:20,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-07 14:21:20,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 320 transitions. [2024-02-07 14:21:20,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-02-07 14:21:20,258 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 84 flow. Second operand 15 states and 320 transitions. [2024-02-07 14:21:20,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 211 transitions, 928 flow [2024-02-07 14:21:20,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 211 transitions, 924 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:21:20,265 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 353 flow [2024-02-07 14:21:20,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=353, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2024-02-07 14:21:20,266 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 27 predicate places. [2024-02-07 14:21:20,266 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 353 flow [2024-02-07 14:21:20,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:20,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:20,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:20,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-07 14:21:20,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:20,482 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-07 14:21:20,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:20,482 INFO L85 PathProgramCache]: Analyzing trace with hash 134985196, now seen corresponding path program 1 times [2024-02-07 14:21:20,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:20,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156805348] [2024-02-07 14:21:20,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:20,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:20,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:20,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156805348] [2024-02-07 14:21:20,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156805348] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:20,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:20,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:21:20,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183181315] [2024-02-07 14:21:20,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:20,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:21:20,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:20,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:21:20,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:21:20,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-02-07 14:21:20,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 353 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:20,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:20,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-02-07 14:21:20,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:20,729 INFO L124 PetriNetUnfolderBase]: 743/1518 cut-off events. [2024-02-07 14:21:20,729 INFO L125 PetriNetUnfolderBase]: For 1696/1696 co-relation queries the response was YES. [2024-02-07 14:21:20,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3610 conditions, 1518 events. 743/1518 cut-off events. For 1696/1696 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7560 event pairs, 250 based on Foata normal form. 72/1565 useless extension candidates. Maximal degree in co-relation 3029. Up to 707 conditions per place. [2024-02-07 14:21:20,737 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 44 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-02-07 14:21:20,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 60 transitions, 376 flow [2024-02-07 14:21:20,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:21:20,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:21:20,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-02-07 14:21:20,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-02-07 14:21:20,739 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 353 flow. Second operand 3 states and 60 transitions. [2024-02-07 14:21:20,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 60 transitions, 376 flow [2024-02-07 14:21:20,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 60 transitions, 342 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-02-07 14:21:20,749 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 229 flow [2024-02-07 14:21:20,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=229, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-02-07 14:21:20,750 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 23 predicate places. [2024-02-07 14:21:20,750 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 229 flow [2024-02-07 14:21:20,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:20,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:20,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:20,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:21:20,751 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-07 14:21:20,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:20,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1587857623, now seen corresponding path program 1 times [2024-02-07 14:21:20,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:20,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965721980] [2024-02-07 14:21:20,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:20,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:20,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:20,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:20,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965721980] [2024-02-07 14:21:20,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965721980] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:20,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:20,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:21:20,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252571418] [2024-02-07 14:21:20,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:20,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:21:20,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:20,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:21:20,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:21:20,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-02-07 14:21:20,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 229 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:20,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:20,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-02-07 14:21:20,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:21,274 INFO L124 PetriNetUnfolderBase]: 919/1874 cut-off events. [2024-02-07 14:21:21,275 INFO L125 PetriNetUnfolderBase]: For 1026/1028 co-relation queries the response was YES. [2024-02-07 14:21:21,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4444 conditions, 1874 events. 919/1874 cut-off events. For 1026/1028 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 9943 event pairs, 282 based on Foata normal form. 2/1846 useless extension candidates. Maximal degree in co-relation 3775. Up to 1103 conditions per place. [2024-02-07 14:21:21,281 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 58 selfloop transitions, 7 changer transitions 8/85 dead transitions. [2024-02-07 14:21:21,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 85 transitions, 486 flow [2024-02-07 14:21:21,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:21:21,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:21:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-02-07 14:21:21,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-02-07 14:21:21,283 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 229 flow. Second operand 5 states and 100 transitions. [2024-02-07 14:21:21,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 85 transitions, 486 flow [2024-02-07 14:21:21,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 475 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:21:21,288 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 287 flow [2024-02-07 14:21:21,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=287, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2024-02-07 14:21:21,289 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 28 predicate places. [2024-02-07 14:21:21,289 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 287 flow [2024-02-07 14:21:21,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:21,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:21,290 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:21,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 14:21:21,290 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-07 14:21:21,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:21,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1262244014, now seen corresponding path program 1 times [2024-02-07 14:21:21,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:21,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339229074] [2024-02-07 14:21:21,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:21,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:21,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:21,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339229074] [2024-02-07 14:21:21,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339229074] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:21,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20859569] [2024-02-07 14:21:21,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:21,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:21,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:21,638 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:21:21,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 14:21:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:21,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-07 14:21:21,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:21,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-07 14:21:21,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2024-02-07 14:21:21,887 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 80 treesize of output 32 [2024-02-07 14:21:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:21,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:21:22,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2024-02-07 14:21:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:22,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20859569] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:21:22,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:21:22,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-02-07 14:21:22,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728076830] [2024-02-07 14:21:22,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:21:22,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 14:21:22,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:22,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 14:21:22,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:21:22,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 14:21:22,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 287 flow. Second operand has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:22,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:22,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 14:21:22,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:22,964 INFO L124 PetriNetUnfolderBase]: 2279/4521 cut-off events. [2024-02-07 14:21:22,964 INFO L125 PetriNetUnfolderBase]: For 4352/4352 co-relation queries the response was YES. [2024-02-07 14:21:22,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10845 conditions, 4521 events. 2279/4521 cut-off events. For 4352/4352 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 25461 event pairs, 317 based on Foata normal form. 16/4503 useless extension candidates. Maximal degree in co-relation 9683. Up to 674 conditions per place. [2024-02-07 14:21:22,985 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 201 selfloop transitions, 56 changer transitions 27/289 dead transitions. [2024-02-07 14:21:22,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 289 transitions, 1711 flow [2024-02-07 14:21:22,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-07 14:21:22,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-07 14:21:22,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 381 transitions. [2024-02-07 14:21:22,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5729323308270676 [2024-02-07 14:21:22,988 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 287 flow. Second operand 19 states and 381 transitions. [2024-02-07 14:21:22,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 289 transitions, 1711 flow [2024-02-07 14:21:22,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 289 transitions, 1703 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-02-07 14:21:22,997 INFO L231 Difference]: Finished difference. Result has 80 places, 98 transitions, 732 flow [2024-02-07 14:21:22,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=732, PETRI_PLACES=80, PETRI_TRANSITIONS=98} [2024-02-07 14:21:22,998 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 47 predicate places. [2024-02-07 14:21:22,999 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 98 transitions, 732 flow [2024-02-07 14:21:22,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:22,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:22,999 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:23,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-07 14:21:23,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:23,211 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-07 14:21:23,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:23,211 INFO L85 PathProgramCache]: Analyzing trace with hash -235686699, now seen corresponding path program 1 times [2024-02-07 14:21:23,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:23,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613999857] [2024-02-07 14:21:23,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:23,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:23,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:23,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:23,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613999857] [2024-02-07 14:21:23,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613999857] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:23,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958437515] [2024-02-07 14:21:23,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:23,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:23,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:23,985 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:21:24,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 14:21:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:24,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:21:24,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:24,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-02-07 14:21:24,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 82 treesize of output 66 [2024-02-07 14:21:24,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 94 [2024-02-07 14:21:24,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 43 [2024-02-07 14:21:24,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-07 14:21:24,699 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 113 treesize of output 57 [2024-02-07 14:21:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:24,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:21:25,180 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-07 14:21:25,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 12 [2024-02-07 14:21:25,215 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-02-07 14:21:25,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 63 [2024-02-07 14:21:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:25,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958437515] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:21:25,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:21:25,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-02-07 14:21:25,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272565701] [2024-02-07 14:21:25,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:21:25,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-07 14:21:25,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:25,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-07 14:21:25,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-02-07 14:21:25,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 14:21:25,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 98 transitions, 732 flow. Second operand has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:25,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:25,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 14:21:25,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:27,855 INFO L124 PetriNetUnfolderBase]: 4663/9194 cut-off events. [2024-02-07 14:21:27,855 INFO L125 PetriNetUnfolderBase]: For 13879/13879 co-relation queries the response was YES. [2024-02-07 14:21:27,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23289 conditions, 9194 events. 4663/9194 cut-off events. For 13879/13879 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 59715 event pairs, 787 based on Foata normal form. 96/9288 useless extension candidates. Maximal degree in co-relation 22104. Up to 1400 conditions per place. [2024-02-07 14:21:27,909 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 260 selfloop transitions, 131 changer transitions 69/465 dead transitions. [2024-02-07 14:21:27,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 465 transitions, 3190 flow [2024-02-07 14:21:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-02-07 14:21:27,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-02-07 14:21:27,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 563 transitions. [2024-02-07 14:21:27,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5361904761904762 [2024-02-07 14:21:27,912 INFO L175 Difference]: Start difference. First operand has 80 places, 98 transitions, 732 flow. Second operand 30 states and 563 transitions. [2024-02-07 14:21:27,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 465 transitions, 3190 flow [2024-02-07 14:21:27,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 465 transitions, 2900 flow, removed 133 selfloop flow, removed 4 redundant places. [2024-02-07 14:21:27,943 INFO L231 Difference]: Finished difference. Result has 115 places, 177 transitions, 1587 flow [2024-02-07 14:21:27,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1587, PETRI_PLACES=115, PETRI_TRANSITIONS=177} [2024-02-07 14:21:27,945 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 82 predicate places. [2024-02-07 14:21:27,946 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 177 transitions, 1587 flow [2024-02-07 14:21:27,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:27,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:27,946 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2024-02-07 14:21:27,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-07 14:21:28,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:28,158 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-07 14:21:28,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:28,158 INFO L85 PathProgramCache]: Analyzing trace with hash 449342831, now seen corresponding path program 2 times [2024-02-07 14:21:28,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:28,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229563334] [2024-02-07 14:21:28,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:28,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:28,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:28,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229563334] [2024-02-07 14:21:28,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229563334] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:28,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431361905] [2024-02-07 14:21:28,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:21:28,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:28,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:28,424 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) [2024-02-07 14:21:28,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-07 14:21:28,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:21:28,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:21:28,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:21:28,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:28,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-07 14:21:28,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-07 14:21:28,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-07 14:21:28,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-07 14:21:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:28,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:21:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:28,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431361905] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:21:28,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:21:28,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2024-02-07 14:21:28,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876139032] [2024-02-07 14:21:28,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:21:28,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-07 14:21:28,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:28,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-07 14:21:28,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2024-02-07 14:21:28,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 14:21:28,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 177 transitions, 1587 flow. Second operand has 19 states, 19 states have (on average 10.789473684210526) internal successors, (205), 19 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:28,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:28,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 14:21:28,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:31,801 INFO L124 PetriNetUnfolderBase]: 11605/22760 cut-off events. [2024-02-07 14:21:31,802 INFO L125 PetriNetUnfolderBase]: For 40458/40458 co-relation queries the response was YES. [2024-02-07 14:21:31,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60045 conditions, 22760 events. 11605/22760 cut-off events. For 40458/40458 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 170149 event pairs, 2528 based on Foata normal form. 560/23318 useless extension candidates. Maximal degree in co-relation 58060. Up to 3883 conditions per place. [2024-02-07 14:21:32,104 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 491 selfloop transitions, 363 changer transitions 0/859 dead transitions. [2024-02-07 14:21:32,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 859 transitions, 7147 flow [2024-02-07 14:21:32,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-02-07 14:21:32,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-02-07 14:21:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 830 transitions. [2024-02-07 14:21:32,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5514950166112956 [2024-02-07 14:21:32,107 INFO L175 Difference]: Start difference. First operand has 115 places, 177 transitions, 1587 flow. Second operand 43 states and 830 transitions. [2024-02-07 14:21:32,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 859 transitions, 7147 flow [2024-02-07 14:21:32,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 859 transitions, 6897 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-02-07 14:21:32,442 INFO L231 Difference]: Finished difference. Result has 170 places, 430 transitions, 4730 flow [2024-02-07 14:21:32,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=4730, PETRI_PLACES=170, PETRI_TRANSITIONS=430} [2024-02-07 14:21:32,442 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 137 predicate places. [2024-02-07 14:21:32,443 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 430 transitions, 4730 flow [2024-02-07 14:21:32,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.789473684210526) internal successors, (205), 19 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:32,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:32,443 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:32,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-07 14:21:32,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:32,655 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-07 14:21:32,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:32,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1522174711, now seen corresponding path program 2 times [2024-02-07 14:21:32,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:32,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097578993] [2024-02-07 14:21:32,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:32,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:35,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:35,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097578993] [2024-02-07 14:21:35,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097578993] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:35,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669785264] [2024-02-07 14:21:35,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:21:35,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:35,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:35,076 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) [2024-02-07 14:21:35,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-07 14:21:35,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:21:35,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:21:35,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-07 14:21:35,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:35,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-02-07 14:21:35,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 66 treesize of output 50 [2024-02-07 14:21:35,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 72 [2024-02-07 14:21:35,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2024-02-07 14:21:35,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 123 treesize of output 95 [2024-02-07 14:21:35,488 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-07 14:21:35,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 111 [2024-02-07 14:21:35,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2024-02-07 14:21:36,784 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-07 14:21:36,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 227 treesize of output 107 [2024-02-07 14:21:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:36,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:21:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:37,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669785264] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:21:37,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:21:37,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2024-02-07 14:21:37,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234179870] [2024-02-07 14:21:37,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:21:37,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-07 14:21:37,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:37,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-07 14:21:37,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2024-02-07 14:21:37,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 14:21:37,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 430 transitions, 4730 flow. Second operand has 24 states, 24 states have (on average 11.125) internal successors, (267), 24 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:37,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:37,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 14:21:37,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:52,855 INFO L124 PetriNetUnfolderBase]: 30477/59440 cut-off events. [2024-02-07 14:21:52,855 INFO L125 PetriNetUnfolderBase]: For 182994/182994 co-relation queries the response was YES. [2024-02-07 14:21:53,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171695 conditions, 59440 events. 30477/59440 cut-off events. For 182994/182994 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 494914 event pairs, 4321 based on Foata normal form. 648/60046 useless extension candidates. Maximal degree in co-relation 169504. Up to 9318 conditions per place. [2024-02-07 14:21:53,573 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 588 selfloop transitions, 910 changer transitions 72/1575 dead transitions. [2024-02-07 14:21:53,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 1575 transitions, 17679 flow [2024-02-07 14:21:53,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-02-07 14:21:53,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-02-07 14:21:53,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 804 transitions. [2024-02-07 14:21:53,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104761904761905 [2024-02-07 14:21:53,577 INFO L175 Difference]: Start difference. First operand has 170 places, 430 transitions, 4730 flow. Second operand 45 states and 804 transitions. [2024-02-07 14:21:53,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 1575 transitions, 17679 flow [2024-02-07 14:21:54,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 1575 transitions, 16717 flow, removed 438 selfloop flow, removed 1 redundant places. [2024-02-07 14:21:54,510 INFO L231 Difference]: Finished difference. Result has 235 places, 1084 transitions, 14195 flow [2024-02-07 14:21:54,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4414, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=14195, PETRI_PLACES=235, PETRI_TRANSITIONS=1084} [2024-02-07 14:21:54,511 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 202 predicate places. [2024-02-07 14:21:54,511 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 1084 transitions, 14195 flow [2024-02-07 14:21:54,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 11.125) internal successors, (267), 24 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:54,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:54,511 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:54,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-07 14:21:54,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:54,721 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-07 14:21:54,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:54,721 INFO L85 PathProgramCache]: Analyzing trace with hash -171303150, now seen corresponding path program 1 times [2024-02-07 14:21:54,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:54,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334159049] [2024-02-07 14:21:54,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:54,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:54,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-07 14:21:54,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:54,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334159049] [2024-02-07 14:21:54,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334159049] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:54,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653742890] [2024-02-07 14:21:54,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:54,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:54,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:54,977 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:21:55,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-07 14:21:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:55,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-07 14:21:55,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:55,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-07 14:21:55,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-07 14:21:55,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-07 14:21:55,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-07 14:21:55,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-07 14:21:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:55,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:21:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-02-07 14:21:55,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653742890] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:21:55,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:21:55,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 5] total 18 [2024-02-07 14:21:55,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914169396] [2024-02-07 14:21:55,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:21:55,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-07 14:21:55,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:55,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-07 14:21:55,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2024-02-07 14:21:55,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 14:21:55,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 1084 transitions, 14195 flow. Second operand has 18 states, 18 states have (on average 12.277777777777779) internal successors, (221), 18 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:55,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:55,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 14:21:55,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand