./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack-1.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack-1.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 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-1.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack-1.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-?-80b1b13-m [2024-01-31 16:40:40,529 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:40:40,615 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:40:40,620 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:40:40,620 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:40:40,644 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:40:40,645 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:40:40,645 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:40:40,646 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:40:40,649 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:40:40,649 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:40:40,650 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:40:40,650 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:40:40,651 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:40:40,652 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:40:40,652 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:40:40,652 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:40:40,652 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:40:40,653 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:40:40,653 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:40:40,653 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:40:40,653 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:40:40,654 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:40:40,654 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:40:40,654 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:40:40,654 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:40:40,655 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:40:40,655 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:40:40,655 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:40:40,656 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:40:40,656 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:40:40,657 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:40:40,657 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:40:40,657 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:40:40,657 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:40:40,657 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:40:40,658 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:40:40,658 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:40:40,658 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:40:40,658 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:40:40,658 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:40:40,659 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:40:40,659 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:40:40,659 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:40:40,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:40:40,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:40:40,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:40:40,916 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:40:40,917 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:40:40,918 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack-1.yml/witness.yml [2024-01-31 16:40:40,997 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:40:40,998 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:40:40,999 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-1.i [2024-01-31 16:40:42,052 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:40:42,295 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:40:42,295 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i [2024-01-31 16:40:42,313 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b596355f5/8cb3859fc0ea431d8afcf84c2f3c2d79/FLAGc4d6aced4 [2024-01-31 16:40:42,326 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b596355f5/8cb3859fc0ea431d8afcf84c2f3c2d79 [2024-01-31 16:40:42,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:40:42,327 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:40:42,330 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:40:42,330 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:40:42,333 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:40:42,334 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:40:40" (1/2) ... [2024-01-31 16:40:42,335 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@530f3890 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:42, skipping insertion in model container [2024-01-31 16:40:42,335 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:40:40" (1/2) ... [2024-01-31 16:40:42,336 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@75d84f90 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:42, skipping insertion in model container [2024-01-31 16:40:42,336 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:40:42" (2/2) ... [2024-01-31 16:40:42,337 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@530f3890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:42, skipping insertion in model container [2024-01-31 16:40:42,337 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:40:42" (2/2) ... [2024-01-31 16:40:42,337 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:40:42,396 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:40:42,397 INFO L98 nessWitnessExtractor]: Location invariant before [L997-L997] ((unsigned long )arg == 0UL) && (((((((((i == 4 || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (0 == i && i == 0)) || (0 == i && i == 0)) || i == 4) [2024-01-31 16:40:42,397 INFO L98 nessWitnessExtractor]: Location invariant before [L1011-L1011] ((unsigned long )arg == 0UL) && ((((((((i == 4 || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (0 == i && i == 0)) || (0 == i && i == 0)) [2024-01-31 16:40:42,437 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:40:42,748 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-1.i[41520,41533] [2024-01-31 16:40:42,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:40:42,781 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:40:42,837 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-1.i[41520,41533] Start Parsing Local Start Parsing Local [2024-01-31 16:40:42,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:40:42,972 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:40:42,972 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:42 WrapperNode [2024-01-31 16:40:42,972 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:40:42,974 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:40:42,974 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:40:42,974 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:40:42,980 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:42" (1/1) ... [2024-01-31 16:40:43,010 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:42" (1/1) ... [2024-01-31 16:40:43,035 INFO L138 Inliner]: procedures = 278, calls = 45, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 162 [2024-01-31 16:40:43,037 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:40:43,038 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:40:43,038 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:40:43,039 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:40:43,047 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:42" (1/1) ... [2024-01-31 16:40:43,047 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:42" (1/1) ... [2024-01-31 16:40:43,049 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:42" (1/1) ... [2024-01-31 16:40:43,065 INFO L175 MemorySlicer]: Split 18 memory accesses to 5 slices as follows [2, 5, 2, 2, 7]. 39 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 0, 0, 5]. The 3 writes are split as follows [0, 0, 1, 1, 1]. [2024-01-31 16:40:43,066 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:42" (1/1) ... [2024-01-31 16:40:43,066 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:42" (1/1) ... [2024-01-31 16:40:43,071 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:42" (1/1) ... [2024-01-31 16:40:43,073 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:42" (1/1) ... [2024-01-31 16:40:43,074 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:42" (1/1) ... [2024-01-31 16:40:43,075 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:42" (1/1) ... [2024-01-31 16:40:43,077 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:40:43,078 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:40:43,078 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:40:43,078 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:40:43,079 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:42" (1/1) ... [2024-01-31 16:40:43,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:40:43,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:43,114 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) [2024-01-31 16:40:43,128 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 [2024-01-31 16:40:43,144 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-31 16:40:43,145 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-31 16:40:43,145 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-31 16:40:43,146 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-31 16:40:43,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:40:43,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:40:43,146 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-31 16:40:43,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:40:43,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:40:43,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:40:43,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 16:40:43,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-31 16:40:43,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:40:43,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:40:43,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:40:43,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 16:40:43,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-31 16:40:43,151 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-31 16:40:43,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:40:43,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:40:43,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:40:43,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:40:43,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 16:40:43,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-31 16:40:43,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:40:43,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:40:43,154 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:40:43,263 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:40:43,265 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:40:43,495 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:40:43,495 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:40:43,653 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:40:43,658 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 16:40:43,659 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:40:43 BoogieIcfgContainer [2024-01-31 16:40:43,659 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:40:43,660 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:40:43,660 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:40:43,663 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:40:43,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:40:40" (1/4) ... [2024-01-31 16:40:43,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eba79b1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:40:43, skipping insertion in model container [2024-01-31 16:40:43,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:40:42" (2/4) ... [2024-01-31 16:40:43,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eba79b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:40:43, skipping insertion in model container [2024-01-31 16:40:43,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:42" (3/4) ... [2024-01-31 16:40:43,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eba79b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:40:43, skipping insertion in model container [2024-01-31 16:40:43,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:40:43" (4/4) ... [2024-01-31 16:40:43,665 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2024-01-31 16:40:43,678 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:40:43,678 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-01-31 16:40:43,678 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:40:43,728 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 16:40:43,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 39 transitions, 92 flow [2024-01-31 16:40:43,782 INFO L124 PetriNetUnfolderBase]: 5/37 cut-off events. [2024-01-31 16:40:43,783 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:40:43,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 37 events. 5/37 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2024-01-31 16:40:43,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 39 transitions, 92 flow [2024-01-31 16:40:43,789 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 35 transitions, 79 flow [2024-01-31 16:40:43,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:40:43,806 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;@df42b13, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:40:43,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-01-31 16:40:43,812 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:40:43,813 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2024-01-31 16:40:43,813 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:40:43,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:43,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:43,814 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:40:43,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:43,823 INFO L85 PathProgramCache]: Analyzing trace with hash 902133647, now seen corresponding path program 1 times [2024-01-31 16:40:43,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:43,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540032007] [2024-01-31 16:40:43,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:43,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:44,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:44,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540032007] [2024-01-31 16:40:44,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540032007] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:44,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:44,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:40:44,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212606227] [2024-01-31 16:40:44,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:44,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:40:44,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:44,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:40:44,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:40:44,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-01-31 16:40:44,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 79 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:44,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:44,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-01-31 16:40:44,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:44,468 INFO L124 PetriNetUnfolderBase]: 484/894 cut-off events. [2024-01-31 16:40:44,468 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-01-31 16:40:44,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1742 conditions, 894 events. 484/894 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4323 event pairs, 262 based on Foata normal form. 88/867 useless extension candidates. Maximal degree in co-relation 1656. Up to 493 conditions per place. [2024-01-31 16:40:44,478 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 40 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2024-01-31 16:40:44,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 200 flow [2024-01-31 16:40:44,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:40:44,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:40:44,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-01-31 16:40:44,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2024-01-31 16:40:44,496 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 79 flow. Second operand 4 states and 89 transitions. [2024-01-31 16:40:44,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 200 flow [2024-01-31 16:40:44,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 51 transitions, 194 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-31 16:40:44,502 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 86 flow [2024-01-31 16:40:44,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-01-31 16:40:44,507 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2024-01-31 16:40:44,507 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 86 flow [2024-01-31 16:40:44,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:44,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:44,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:44,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:40:44,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:40:44,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:44,509 INFO L85 PathProgramCache]: Analyzing trace with hash -632944974, now seen corresponding path program 1 times [2024-01-31 16:40:44,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:44,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272880287] [2024-01-31 16:40:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:44,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:44,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:44,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:44,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272880287] [2024-01-31 16:40:44,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272880287] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:44,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:44,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:40:44,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422463099] [2024-01-31 16:40:44,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:44,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:40:44,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:44,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:40:44,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:40:44,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-01-31 16:40:44,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:44,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:44,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-01-31 16:40:44,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:44,799 INFO L124 PetriNetUnfolderBase]: 430/792 cut-off events. [2024-01-31 16:40:44,800 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-01-31 16:40:44,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1657 conditions, 792 events. 430/792 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3704 event pairs, 49 based on Foata normal form. 4/743 useless extension candidates. Maximal degree in co-relation 1361. Up to 569 conditions per place. [2024-01-31 16:40:44,806 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 47 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2024-01-31 16:40:44,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 58 transitions, 238 flow [2024-01-31 16:40:44,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:40:44,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:40:44,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-01-31 16:40:44,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-01-31 16:40:44,813 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 86 flow. Second operand 4 states and 91 transitions. [2024-01-31 16:40:44,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 58 transitions, 238 flow [2024-01-31 16:40:44,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 58 transitions, 234 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:40:44,820 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 104 flow [2024-01-31 16:40:44,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2024-01-31 16:40:44,821 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2024-01-31 16:40:44,821 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 104 flow [2024-01-31 16:40:44,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:44,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:44,822 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:44,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:40:44,822 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:40:44,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:44,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1579392078, now seen corresponding path program 1 times [2024-01-31 16:40:44,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:44,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197026412] [2024-01-31 16:40:44,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:44,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:44,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:44,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197026412] [2024-01-31 16:40:44,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197026412] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:44,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975515517] [2024-01-31 16:40:44,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:44,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:44,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:45,009 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) [2024-01-31 16:40:45,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 16:40:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:45,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:40:45,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:45,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:40:45,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:45,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975515517] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:40:45,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:40:45,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-01-31 16:40:45,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165853212] [2024-01-31 16:40:45,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:40:45,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:40:45,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:45,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:40:45,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:40:45,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:40:45,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 104 flow. Second operand has 10 states, 10 states have (on average 12.1) internal successors, (121), 10 states have internal predecessors, (121), 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) [2024-01-31 16:40:45,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:45,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:40:45,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:45,819 INFO L124 PetriNetUnfolderBase]: 922/1600 cut-off events. [2024-01-31 16:40:45,819 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-01-31 16:40:45,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3535 conditions, 1600 events. 922/1600 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 7251 event pairs, 22 based on Foata normal form. 108/1570 useless extension candidates. Maximal degree in co-relation 3139. Up to 388 conditions per place. [2024-01-31 16:40:45,827 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 102 selfloop transitions, 7 changer transitions 0/116 dead transitions. [2024-01-31 16:40:45,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 116 transitions, 508 flow [2024-01-31 16:40:45,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:40:45,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:40:45,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-01-31 16:40:45,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993589743589743 [2024-01-31 16:40:45,831 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 104 flow. Second operand 8 states and 187 transitions. [2024-01-31 16:40:45,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 116 transitions, 508 flow [2024-01-31 16:40:45,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 116 transitions, 506 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:40:45,836 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 139 flow [2024-01-31 16:40:45,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=139, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2024-01-31 16:40:45,837 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 13 predicate places. [2024-01-31 16:40:45,838 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 139 flow [2024-01-31 16:40:45,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.1) internal successors, (121), 10 states have internal predecessors, (121), 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) [2024-01-31 16:40:45,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:45,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:45,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 16:40:46,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:46,050 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:40:46,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:46,050 INFO L85 PathProgramCache]: Analyzing trace with hash -2051165161, now seen corresponding path program 1 times [2024-01-31 16:40:46,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:46,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668283751] [2024-01-31 16:40:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:46,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:46,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:46,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668283751] [2024-01-31 16:40:46,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668283751] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:46,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:46,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:40:46,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313933609] [2024-01-31 16:40:46,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:46,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:40:46,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:46,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:40:46,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:40:46,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-01-31 16:40:46,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:46,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:46,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-01-31 16:40:46,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:46,294 INFO L124 PetriNetUnfolderBase]: 478/1024 cut-off events. [2024-01-31 16:40:46,294 INFO L125 PetriNetUnfolderBase]: For 425/425 co-relation queries the response was YES. [2024-01-31 16:40:46,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2403 conditions, 1024 events. 478/1024 cut-off events. For 425/425 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4343 event pairs, 129 based on Foata normal form. 58/1028 useless extension candidates. Maximal degree in co-relation 1701. Up to 569 conditions per place. [2024-01-31 16:40:46,300 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 39 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-01-31 16:40:46,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 291 flow [2024-01-31 16:40:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:40:46,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:40:46,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-01-31 16:40:46,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982905982905983 [2024-01-31 16:40:46,302 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 139 flow. Second operand 3 states and 70 transitions. [2024-01-31 16:40:46,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 291 flow [2024-01-31 16:40:46,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 271 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-01-31 16:40:46,306 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 136 flow [2024-01-31 16:40:46,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2024-01-31 16:40:46,307 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 12 predicate places. [2024-01-31 16:40:46,307 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 136 flow [2024-01-31 16:40:46,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:40:46,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:46,308 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:46,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:40:46,308 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:40:46,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:46,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1672345521, now seen corresponding path program 1 times [2024-01-31 16:40:46,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:46,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881990558] [2024-01-31 16:40:46,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:46,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:46,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:46,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881990558] [2024-01-31 16:40:46,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881990558] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:46,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990515929] [2024-01-31 16:40:46,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:46,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:46,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:46,394 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) [2024-01-31 16:40:46,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 16:40:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:46,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 16:40:46,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:46,513 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 [2024-01-31 16:40:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:46,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:40:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:46,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990515929] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:40:46,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:40:46,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-01-31 16:40:46,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822393777] [2024-01-31 16:40:46,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:40:46,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:40:46,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:46,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:40:46,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:40:46,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:40:46,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 136 flow. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 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) [2024-01-31 16:40:46,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:46,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:40:46,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:47,026 INFO L124 PetriNetUnfolderBase]: 1402/2780 cut-off events. [2024-01-31 16:40:47,027 INFO L125 PetriNetUnfolderBase]: For 1347/1347 co-relation queries the response was YES. [2024-01-31 16:40:47,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6960 conditions, 2780 events. 1402/2780 cut-off events. For 1347/1347 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 15169 event pairs, 211 based on Foata normal form. 40/2763 useless extension candidates. Maximal degree in co-relation 6061. Up to 527 conditions per place. [2024-01-31 16:40:47,042 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 141 selfloop transitions, 19 changer transitions 3/170 dead transitions. [2024-01-31 16:40:47,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 170 transitions, 911 flow [2024-01-31 16:40:47,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:40:47,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:40:47,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-01-31 16:40:47,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5598290598290598 [2024-01-31 16:40:47,044 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 136 flow. Second operand 12 states and 262 transitions. [2024-01-31 16:40:47,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 170 transitions, 911 flow [2024-01-31 16:40:47,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 170 transitions, 889 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:40:47,050 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 266 flow [2024-01-31 16:40:47,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=266, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2024-01-31 16:40:47,051 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 28 predicate places. [2024-01-31 16:40:47,051 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 266 flow [2024-01-31 16:40:47,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 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) [2024-01-31 16:40:47,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:47,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:47,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 16:40:47,263 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 [2024-01-31 16:40:47,263 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:40:47,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:47,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1204701114, now seen corresponding path program 1 times [2024-01-31 16:40:47,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:47,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665157776] [2024-01-31 16:40:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:47,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:47,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:47,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665157776] [2024-01-31 16:40:47,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665157776] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:47,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:47,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:40:47,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691325395] [2024-01-31 16:40:47,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:47,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:40:47,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:47,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:40:47,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:40:47,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-01-31 16:40:47,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 266 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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) [2024-01-31 16:40:47,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:47,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-01-31 16:40:47,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:47,714 INFO L124 PetriNetUnfolderBase]: 1795/3612 cut-off events. [2024-01-31 16:40:47,714 INFO L125 PetriNetUnfolderBase]: For 2557/2561 co-relation queries the response was YES. [2024-01-31 16:40:47,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9400 conditions, 3612 events. 1795/3612 cut-off events. For 2557/2561 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 22214 event pairs, 812 based on Foata normal form. 84/3556 useless extension candidates. Maximal degree in co-relation 7751. Up to 2359 conditions per place. [2024-01-31 16:40:47,735 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 94 selfloop transitions, 3 changer transitions 0/111 dead transitions. [2024-01-31 16:40:47,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 111 transitions, 777 flow [2024-01-31 16:40:47,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:40:47,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:40:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-01-31 16:40:47,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-01-31 16:40:47,737 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 266 flow. Second operand 4 states and 94 transitions. [2024-01-31 16:40:47,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 111 transitions, 777 flow [2024-01-31 16:40:47,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 111 transitions, 751 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-01-31 16:40:47,751 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 272 flow [2024-01-31 16:40:47,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2024-01-31 16:40:47,754 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 32 predicate places. [2024-01-31 16:40:47,754 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 272 flow [2024-01-31 16:40:47,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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) [2024-01-31 16:40:47,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:47,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:47,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:40:47,755 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:40:47,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:47,755 INFO L85 PathProgramCache]: Analyzing trace with hash 899204212, now seen corresponding path program 1 times [2024-01-31 16:40:47,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:47,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998176174] [2024-01-31 16:40:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:47,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:48,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:48,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998176174] [2024-01-31 16:40:48,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998176174] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:48,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:48,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:40:48,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892314787] [2024-01-31 16:40:48,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:48,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:40:48,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:48,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:40:48,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:40:48,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:40:48,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 272 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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) [2024-01-31 16:40:48,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:48,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:40:48,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:48,642 INFO L124 PetriNetUnfolderBase]: 1839/3618 cut-off events. [2024-01-31 16:40:48,643 INFO L125 PetriNetUnfolderBase]: For 3574/3574 co-relation queries the response was YES. [2024-01-31 16:40:48,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10518 conditions, 3618 events. 1839/3618 cut-off events. For 3574/3574 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 21247 event pairs, 521 based on Foata normal form. 8/3577 useless extension candidates. Maximal degree in co-relation 8416. Up to 2729 conditions per place. [2024-01-31 16:40:48,665 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 89 selfloop transitions, 7 changer transitions 0/103 dead transitions. [2024-01-31 16:40:48,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 103 transitions, 642 flow [2024-01-31 16:40:48,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:40:48,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:40:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-01-31 16:40:48,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018315018315018 [2024-01-31 16:40:48,666 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 272 flow. Second operand 7 states and 137 transitions. [2024-01-31 16:40:48,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 103 transitions, 642 flow [2024-01-31 16:40:48,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 103 transitions, 625 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:40:48,675 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 327 flow [2024-01-31 16:40:48,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=327, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2024-01-31 16:40:48,675 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 40 predicate places. [2024-01-31 16:40:48,675 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 327 flow [2024-01-31 16:40:48,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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) [2024-01-31 16:40:48,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:48,676 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:48,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:40:48,676 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:40:48,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:48,676 INFO L85 PathProgramCache]: Analyzing trace with hash 824614131, now seen corresponding path program 1 times [2024-01-31 16:40:48,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:48,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320234324] [2024-01-31 16:40:48,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:48,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:48,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:48,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320234324] [2024-01-31 16:40:48,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320234324] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:48,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877487241] [2024-01-31 16:40:48,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:48,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:48,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:48,816 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) [2024-01-31 16:40:48,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 16:40:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:48,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 16:40:48,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:48,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:40:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:49,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877487241] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:40:49,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:40:49,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-01-31 16:40:49,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665017402] [2024-01-31 16:40:49,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:40:49,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:40:49,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:49,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:40:49,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:40:49,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-01-31 16:40:49,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 327 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 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) [2024-01-31 16:40:49,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:49,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-01-31 16:40:49,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:50,268 INFO L124 PetriNetUnfolderBase]: 3832/8637 cut-off events. [2024-01-31 16:40:50,268 INFO L125 PetriNetUnfolderBase]: For 9381/9393 co-relation queries the response was YES. [2024-01-31 16:40:50,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23528 conditions, 8637 events. 3832/8637 cut-off events. For 9381/9393 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 66748 event pairs, 678 based on Foata normal form. 798/9300 useless extension candidates. Maximal degree in co-relation 20003. Up to 2002 conditions per place. [2024-01-31 16:40:50,349 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 212 selfloop transitions, 11 changer transitions 0/237 dead transitions. [2024-01-31 16:40:50,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 237 transitions, 1814 flow [2024-01-31 16:40:50,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:40:50,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:40:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-01-31 16:40:50,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6593406593406593 [2024-01-31 16:40:50,351 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 327 flow. Second operand 7 states and 180 transitions. [2024-01-31 16:40:50,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 237 transitions, 1814 flow [2024-01-31 16:40:50,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 237 transitions, 1790 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:40:50,385 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 427 flow [2024-01-31 16:40:50,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=427, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2024-01-31 16:40:50,389 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 48 predicate places. [2024-01-31 16:40:50,389 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 427 flow [2024-01-31 16:40:50,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 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) [2024-01-31 16:40:50,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:50,390 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:50,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 16:40:50,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:50,657 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:40:50,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:50,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1910375051, now seen corresponding path program 1 times [2024-01-31 16:40:50,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:50,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907949556] [2024-01-31 16:40:50,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:50,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:51,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:51,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907949556] [2024-01-31 16:40:51,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907949556] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:51,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296977602] [2024-01-31 16:40:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:51,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:51,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:51,173 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) [2024-01-31 16:40:51,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 16:40:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:51,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 16:40:51,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:51,317 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 [2024-01-31 16:40:51,394 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 [2024-01-31 16:40:51,502 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 [2024-01-31 16:40:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:51,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:40:51,872 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 [2024-01-31 16:40:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:51,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296977602] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:40:51,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:40:51,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-01-31 16:40:51,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982258936] [2024-01-31 16:40:51,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:40:51,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:40:51,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:51,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:40:51,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:40:51,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:40:51,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 427 flow. Second operand has 21 states, 21 states have (on average 12.0) internal successors, (252), 21 states have internal predecessors, (252), 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) [2024-01-31 16:40:51,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:51,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:40:51,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:57,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 16:41:00,226 INFO L124 PetriNetUnfolderBase]: 8778/17703 cut-off events. [2024-01-31 16:41:00,226 INFO L125 PetriNetUnfolderBase]: For 35034/35034 co-relation queries the response was YES. [2024-01-31 16:41:00,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57871 conditions, 17703 events. 8778/17703 cut-off events. For 35034/35034 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 141087 event pairs, 741 based on Foata normal form. 28/17674 useless extension candidates. Maximal degree in co-relation 47021. Up to 3087 conditions per place. [2024-01-31 16:41:00,357 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 512 selfloop transitions, 99 changer transitions 30/648 dead transitions. [2024-01-31 16:41:00,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 648 transitions, 5019 flow [2024-01-31 16:41:00,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-01-31 16:41:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-01-31 16:41:00,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 918 transitions. [2024-01-31 16:41:00,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803767660910518 [2024-01-31 16:41:00,361 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 427 flow. Second operand 49 states and 918 transitions. [2024-01-31 16:41:00,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 648 transitions, 5019 flow [2024-01-31 16:41:00,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 648 transitions, 4795 flow, removed 91 selfloop flow, removed 2 redundant places. [2024-01-31 16:41:00,445 INFO L231 Difference]: Finished difference. Result has 146 places, 152 transitions, 1270 flow [2024-01-31 16:41:00,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=1270, PETRI_PLACES=146, PETRI_TRANSITIONS=152} [2024-01-31 16:41:00,447 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 109 predicate places. [2024-01-31 16:41:00,447 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 152 transitions, 1270 flow [2024-01-31 16:41:00,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 12.0) internal successors, (252), 21 states have internal predecessors, (252), 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) [2024-01-31 16:41:00,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:00,448 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:00,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-01-31 16:41:00,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:00,673 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:41:00,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:00,673 INFO L85 PathProgramCache]: Analyzing trace with hash 139023932, now seen corresponding path program 1 times [2024-01-31 16:41:00,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:00,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448795223] [2024-01-31 16:41:00,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:00,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:00,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:00,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448795223] [2024-01-31 16:41:00,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448795223] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:00,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53239072] [2024-01-31 16:41:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:00,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:00,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:00,869 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) [2024-01-31 16:41:00,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 16:41:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:00,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:41:00,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:01,006 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 [2024-01-31 16:41:01,046 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 [2024-01-31 16:41:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:01,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 16:41:01,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53239072] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:01,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:01,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 15 [2024-01-31 16:41:01,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25727194] [2024-01-31 16:41:01,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:01,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:41:01,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:01,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:41:01,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:41:01,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:41:01,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 152 transitions, 1270 flow. Second operand has 15 states, 15 states have (on average 14.133333333333333) internal successors, (212), 15 states have internal predecessors, (212), 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) [2024-01-31 16:41:01,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:01,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:41:01,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:04,797 INFO L124 PetriNetUnfolderBase]: 10545/21448 cut-off events. [2024-01-31 16:41:04,798 INFO L125 PetriNetUnfolderBase]: For 75279/75349 co-relation queries the response was YES. [2024-01-31 16:41:04,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77775 conditions, 21448 events. 10545/21448 cut-off events. For 75279/75349 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 174659 event pairs, 1565 based on Foata normal form. 782/22229 useless extension candidates. Maximal degree in co-relation 76167. Up to 3740 conditions per place. [2024-01-31 16:41:05,020 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 386 selfloop transitions, 125 changer transitions 9/527 dead transitions. [2024-01-31 16:41:05,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 527 transitions, 4708 flow [2024-01-31 16:41:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 16:41:05,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 16:41:05,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 544 transitions. [2024-01-31 16:41:05,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51661918328585 [2024-01-31 16:41:05,023 INFO L175 Difference]: Start difference. First operand has 146 places, 152 transitions, 1270 flow. Second operand 27 states and 544 transitions. [2024-01-31 16:41:05,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 527 transitions, 4708 flow [2024-01-31 16:41:05,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 527 transitions, 4321 flow, removed 182 selfloop flow, removed 7 redundant places. [2024-01-31 16:41:05,201 INFO L231 Difference]: Finished difference. Result has 175 places, 200 transitions, 1826 flow [2024-01-31 16:41:05,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1826, PETRI_PLACES=175, PETRI_TRANSITIONS=200} [2024-01-31 16:41:05,202 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 138 predicate places. [2024-01-31 16:41:05,202 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 200 transitions, 1826 flow [2024-01-31 16:41:05,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.133333333333333) internal successors, (212), 15 states have internal predecessors, (212), 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) [2024-01-31 16:41:05,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:05,204 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:05,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 16:41:05,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-01-31 16:41:05,418 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:41:05,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:05,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1649500180, now seen corresponding path program 1 times [2024-01-31 16:41:05,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:05,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725298624] [2024-01-31 16:41:05,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:05,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:05,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:05,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:05,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725298624] [2024-01-31 16:41:05,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725298624] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:05,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876146892] [2024-01-31 16:41:05,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:05,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:05,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:05,962 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) [2024-01-31 16:41:05,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 16:41:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:06,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 16 conjunts are in the unsatisfiable core [2024-01-31 16:41:06,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:06,111 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 [2024-01-31 16:41:06,317 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 50 treesize of output 19 [2024-01-31 16:41:06,492 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 56 treesize of output 32 [2024-01-31 16:41:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:06,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:06,966 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:41:06,967 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 [2024-01-31 16:41:07,030 INFO L349 Elim1Store]: treesize reduction 8, result has 70.4 percent of original size [2024-01-31 16:41:07,031 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 107 treesize of output 94 [2024-01-31 16:41:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:07,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876146892] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:07,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:07,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2024-01-31 16:41:07,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960163846] [2024-01-31 16:41:07,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:07,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 16:41:07,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:07,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 16:41:07,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2024-01-31 16:41:07,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:41:07,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 200 transitions, 1826 flow. Second operand has 25 states, 25 states have (on average 12.24) internal successors, (306), 25 states have internal predecessors, (306), 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) [2024-01-31 16:41:07,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:07,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:41:07,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:14,711 INFO L124 PetriNetUnfolderBase]: 14773/29953 cut-off events. [2024-01-31 16:41:14,711 INFO L125 PetriNetUnfolderBase]: For 110570/110672 co-relation queries the response was YES. [2024-01-31 16:41:14,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111325 conditions, 29953 events. 14773/29953 cut-off events. For 110570/110672 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 258242 event pairs, 1901 based on Foata normal form. 152/30104 useless extension candidates. Maximal degree in co-relation 110168. Up to 5146 conditions per place. [2024-01-31 16:41:15,082 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 609 selfloop transitions, 221 changer transitions 42/879 dead transitions. [2024-01-31 16:41:15,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 879 transitions, 8023 flow [2024-01-31 16:41:15,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-01-31 16:41:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2024-01-31 16:41:15,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 1033 transitions. [2024-01-31 16:41:15,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905033238366572 [2024-01-31 16:41:15,085 INFO L175 Difference]: Start difference. First operand has 175 places, 200 transitions, 1826 flow. Second operand 54 states and 1033 transitions. [2024-01-31 16:41:15,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 879 transitions, 8023 flow [2024-01-31 16:41:15,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 879 transitions, 7937 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-01-31 16:41:15,651 INFO L231 Difference]: Finished difference. Result has 247 places, 307 transitions, 3635 flow [2024-01-31 16:41:15,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=3635, PETRI_PLACES=247, PETRI_TRANSITIONS=307} [2024-01-31 16:41:15,652 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 210 predicate places. [2024-01-31 16:41:15,652 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 307 transitions, 3635 flow [2024-01-31 16:41:15,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 12.24) internal successors, (306), 25 states have internal predecessors, (306), 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) [2024-01-31 16:41:15,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:15,653 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2024-01-31 16:41:15,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-01-31 16:41:15,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:15,854 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:41:15,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:15,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1522961166, now seen corresponding path program 2 times [2024-01-31 16:41:15,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:15,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298273621] [2024-01-31 16:41:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:15,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:16,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:16,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298273621] [2024-01-31 16:41:16,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298273621] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:16,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817560577] [2024-01-31 16:41:16,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:41:16,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:16,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:16,047 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:41:16,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 16:41:16,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:41:16,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:41:16,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:41:16,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:16,216 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 [2024-01-31 16:41:16,256 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 [2024-01-31 16:41:16,314 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 [2024-01-31 16:41:16,369 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 [2024-01-31 16:41:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:16,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:16,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817560577] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:16,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:16,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 15] total 32 [2024-01-31 16:41:16,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18232899] [2024-01-31 16:41:16,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:16,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-31 16:41:16,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:16,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-31 16:41:16,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 16:41:16,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-01-31 16:41:16,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 307 transitions, 3635 flow. Second operand has 33 states, 33 states have (on average 11.151515151515152) internal successors, (368), 33 states have internal predecessors, (368), 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) [2024-01-31 16:41:16,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:16,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-01-31 16:41:16,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:30,649 INFO L124 PetriNetUnfolderBase]: 33426/62605 cut-off events. [2024-01-31 16:41:30,649 INFO L125 PetriNetUnfolderBase]: For 559110/559444 co-relation queries the response was YES. [2024-01-31 16:41:31,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271428 conditions, 62605 events. 33426/62605 cut-off events. For 559110/559444 co-relation queries the response was YES. Maximal size of possible extension queue 1183. Compared 555227 event pairs, 3465 based on Foata normal form. 396/63001 useless extension candidates. Maximal degree in co-relation 269802. Up to 11041 conditions per place. [2024-01-31 16:41:31,700 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 1363 selfloop transitions, 633 changer transitions 49/2050 dead transitions. [2024-01-31 16:41:31,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 2050 transitions, 23595 flow [2024-01-31 16:41:31,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-01-31 16:41:31,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2024-01-31 16:41:31,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 1842 transitions. [2024-01-31 16:41:31,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49198717948717946 [2024-01-31 16:41:31,703 INFO L175 Difference]: Start difference. First operand has 247 places, 307 transitions, 3635 flow. Second operand 96 states and 1842 transitions. [2024-01-31 16:41:31,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 2050 transitions, 23595 flow [2024-01-31 16:41:34,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 2050 transitions, 22698 flow, removed 270 selfloop flow, removed 12 redundant places. [2024-01-31 16:41:34,294 INFO L231 Difference]: Finished difference. Result has 376 places, 791 transitions, 10934 flow [2024-01-31 16:41:34,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3234, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=10934, PETRI_PLACES=376, PETRI_TRANSITIONS=791} [2024-01-31 16:41:34,295 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 339 predicate places. [2024-01-31 16:41:34,295 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 791 transitions, 10934 flow [2024-01-31 16:41:34,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 11.151515151515152) internal successors, (368), 33 states have internal predecessors, (368), 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) [2024-01-31 16:41:34,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:34,296 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:34,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-31 16:41:34,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:34,507 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:41:34,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:34,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1910210098, now seen corresponding path program 2 times [2024-01-31 16:41:34,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:34,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609233902] [2024-01-31 16:41:34,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:34,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 30 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:34,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:34,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609233902] [2024-01-31 16:41:34,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609233902] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:34,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498027340] [2024-01-31 16:41:34,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:41:34,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:34,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:34,710 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:41:34,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 16:41:34,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:41:34,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:41:34,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-31 16:41:34,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:34,988 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:41:34,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498027340] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:41:34,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:41:34,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2024-01-31 16:41:34,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420534431] [2024-01-31 16:41:34,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:41:34,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:41:34,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:34,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:41:34,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:41:34,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:41:34,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 791 transitions, 10934 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 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) [2024-01-31 16:41:34,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:34,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:41:34,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand