./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longest-2.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack_longest-2.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_longest-2.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack_longest-2.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-?-80b1b13-m [2024-01-31 16:40:50,077 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:40:50,144 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:40:50,149 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:40:50,149 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:40:50,330 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:40:50,331 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:40:50,331 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:40:50,332 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:40:50,332 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:40:50,332 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:40:50,333 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:40:50,333 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:40:50,333 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:40:50,334 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:40:50,334 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:40:50,334 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:40:50,334 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:40:50,335 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:40:50,335 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:40:50,335 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:40:50,336 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:40:50,336 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:40:50,336 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:40:50,337 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:40:50,337 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:40:50,337 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:40:50,337 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:40:50,338 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:40:50,338 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:40:50,338 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:40:50,338 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:40:50,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:40:50,339 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:40:50,339 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:40:50,339 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:40:50,340 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:40:50,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:40:50,340 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:40:50,340 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:40:50,340 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:40:50,341 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:40:50,341 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:40:50,341 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:40:50,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:40:50,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:40:50,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:40:50,572 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:40:50,572 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:40:50,573 INFO L431 ainManager$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_longest-2.yml/witness.yml [2024-01-31 16:40:50,715 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:40:50,715 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:40:50,717 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2024-01-31 16:40:51,841 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:40:52,105 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:40:52,105 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2024-01-31 16:40:52,126 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f4e109a6/b2cbdbf7389a46f8b19238dfeb65eb6e/FLAGdc067944c [2024-01-31 16:40:52,142 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f4e109a6/b2cbdbf7389a46f8b19238dfeb65eb6e [2024-01-31 16:40:52,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:40:52,143 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:40:52,144 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:40:52,144 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:40:52,148 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:40:52,149 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:40:50" (1/2) ... [2024-01-31 16:40:52,150 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bdaabb7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:52, skipping insertion in model container [2024-01-31 16:40:52,150 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:40:50" (1/2) ... [2024-01-31 16:40:52,151 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@462f2e64 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:52, skipping insertion in model container [2024-01-31 16:40:52,151 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:40:52" (2/2) ... [2024-01-31 16:40:52,152 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bdaabb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:52, skipping insertion in model container [2024-01-31 16:40:52,152 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:40:52" (2/2) ... [2024-01-31 16:40:52,152 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:40:52,240 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:40:52,241 INFO L98 nessWitnessExtractor]: Location invariant before [L1010-L1010] ((unsigned long )arg == 0UL) && ((((((((((((((((i == 5 || i == 4) || i == 4) || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 7) || i == 6) || i == 6) [2024-01-31 16:40:52,241 INFO L98 nessWitnessExtractor]: Location invariant before [L996-L996] ((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)) || (5 <= i && i <= 799)) || (5 <= i && i <= 799)) || i == 4) [2024-01-31 16:40:52,301 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:40:52,676 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] [2024-01-31 16:40:52,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:40:52,707 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:40:52,736 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] Start Parsing Local Start Parsing Local [2024-01-31 16:40:52,786 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:40:52,831 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:40:52,831 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:52 WrapperNode [2024-01-31 16:40:52,831 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:40:52,832 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:40:52,832 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:40:52,832 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:40:52,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,863 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,899 INFO L138 Inliner]: procedures = 278, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 158 [2024-01-31 16:40:52,899 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:40:52,900 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:40:52,900 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:40:52,900 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:40:52,909 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,909 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,922 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,938 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 2, 5, 3, 2]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0, 0]. The 4 writes are split as follows [0, 1, 0, 2, 1]. [2024-01-31 16:40:52,944 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,944 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,952 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,960 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,964 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,968 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,970 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:40:52,973 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:40:52,973 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:40:52,973 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:40:52,974 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:52" (1/1) ... [2024-01-31 16:40:52,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:40:52,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:53,017 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 16:40:53,053 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 16:40:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-31 16:40:53,076 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-31 16:40:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-31 16:40:53,077 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-31 16:40:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:40:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:40:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-31 16:40:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:40:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:40:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:40:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 16:40:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-31 16:40:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:40:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:40:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:40:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 16:40:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-31 16:40:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-31 16:40:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:40:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:40:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:40:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:40:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 16:40:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-31 16:40:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:40:53,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:40:53,083 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 16:40:53,227 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:40:53,229 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:40:53,409 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:40:53,410 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:40:53,632 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:40:53,633 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 16:40:53,634 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:40:53 BoogieIcfgContainer [2024-01-31 16:40:53,634 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:40:53,635 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:40:53,636 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:40:53,639 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:40:53,639 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:40:50" (1/4) ... [2024-01-31 16:40:53,640 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79dd3ba0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:40:53, skipping insertion in model container [2024-01-31 16:40:53,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:40:52" (2/4) ... [2024-01-31 16:40:53,640 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79dd3ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:40:53, skipping insertion in model container [2024-01-31 16:40:53,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:52" (3/4) ... [2024-01-31 16:40:53,641 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79dd3ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:40:53, skipping insertion in model container [2024-01-31 16:40:53,641 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:40:53" (4/4) ... [2024-01-31 16:40:53,642 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2024-01-31 16:40:53,655 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:40:53,655 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-01-31 16:40:53,655 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:40:53,750 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 16:40:53,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 39 transitions, 92 flow [2024-01-31 16:40:53,819 INFO L124 PetriNetUnfolderBase]: 5/37 cut-off events. [2024-01-31 16:40:53,819 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:40:53,823 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 6. Compared 85 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 16:40:53,823 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 39 transitions, 92 flow [2024-01-31 16:40:53,826 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 35 transitions, 79 flow [2024-01-31 16:40:53,837 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:40:53,847 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;@1ae069c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:40:53,847 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-01-31 16:40:53,853 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:40:53,853 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2024-01-31 16:40:53,853 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:40:53,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:53,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:53,855 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 16:40:53,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:53,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1267867462, now seen corresponding path program 1 times [2024-01-31 16:40:53,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:53,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927711197] [2024-01-31 16:40:53,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:53,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:54,291 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 16:40:54,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:54,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927711197] [2024-01-31 16:40:54,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927711197] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:54,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:54,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:40:54,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151631807] [2024-01-31 16:40:54,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:54,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:40:54,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:54,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:40:54,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:40:54,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-01-31 16:40:54,338 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 16:40:54,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:54,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-01-31 16:40:54,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:54,509 INFO L124 PetriNetUnfolderBase]: 478/902 cut-off events. [2024-01-31 16:40:54,510 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-01-31 16:40:54,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1741 conditions, 902 events. 478/902 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4414 event pairs, 258 based on Foata normal form. 88/879 useless extension candidates. Maximal degree in co-relation 1655. Up to 492 conditions per place. [2024-01-31 16:40:54,518 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 40 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2024-01-31 16:40:54,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 200 flow [2024-01-31 16:40:54,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:40:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:40:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-01-31 16:40:54,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2024-01-31 16:40:54,529 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 79 flow. Second operand 4 states and 89 transitions. [2024-01-31 16:40:54,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 200 flow [2024-01-31 16:40:54,532 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 16:40:54,534 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 86 flow [2024-01-31 16:40:54,535 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 16:40:54,537 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2024-01-31 16:40:54,537 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 86 flow [2024-01-31 16:40:54,538 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 16:40:54,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:54,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:54,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:40:54,538 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 16:40:54,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:54,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1350067287, now seen corresponding path program 1 times [2024-01-31 16:40:54,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:54,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928204225] [2024-01-31 16:40:54,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:54,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:54,631 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 16:40:54,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:54,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928204225] [2024-01-31 16:40:54,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928204225] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:54,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:54,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:40:54,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417174947] [2024-01-31 16:40:54,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:54,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:40:54,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:54,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:40:54,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:40:54,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-01-31 16:40:54,638 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 16:40:54,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:54,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-01-31 16:40:54,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:54,744 INFO L124 PetriNetUnfolderBase]: 430/800 cut-off events. [2024-01-31 16:40:54,744 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-01-31 16:40:54,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1665 conditions, 800 events. 430/800 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3803 event pairs, 49 based on Foata normal form. 6/757 useless extension candidates. Maximal degree in co-relation 1364. Up to 569 conditions per place. [2024-01-31 16:40:54,749 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 47 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2024-01-31 16:40:54,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 58 transitions, 238 flow [2024-01-31 16:40:54,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:40:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:40:54,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-01-31 16:40:54,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-01-31 16:40:54,751 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 86 flow. Second operand 4 states and 91 transitions. [2024-01-31 16:40:54,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 58 transitions, 238 flow [2024-01-31 16:40:54,752 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 16:40:54,753 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 104 flow [2024-01-31 16:40:54,753 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 16:40:54,754 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2024-01-31 16:40:54,754 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 104 flow [2024-01-31 16:40:54,754 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 16:40:54,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:54,754 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:54,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:40:54,755 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 16:40:54,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:54,755 INFO L85 PathProgramCache]: Analyzing trace with hash -607712337, now seen corresponding path program 1 times [2024-01-31 16:40:54,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:54,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14854785] [2024-01-31 16:40:54,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:54,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:54,933 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 16:40:54,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:54,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14854785] [2024-01-31 16:40:54,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14854785] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:54,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185631554] [2024-01-31 16:40:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:54,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:54,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:54,935 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 16:40:54,963 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 16:40:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:55,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:40:55,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:55,115 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 16:40:55,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:40:55,550 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 16:40:55,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185631554] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:40:55,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:40:55,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-01-31 16:40:55,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740494940] [2024-01-31 16:40:55,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:40:55,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:40:55,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:55,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:40:55,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:40:55,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:40:55,566 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 16:40:55,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:55,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:40:55,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:56,053 INFO L124 PetriNetUnfolderBase]: 922/1603 cut-off events. [2024-01-31 16:40:56,054 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-01-31 16:40:56,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3538 conditions, 1603 events. 922/1603 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 7267 event pairs, 22 based on Foata normal form. 108/1575 useless extension candidates. Maximal degree in co-relation 3142. Up to 388 conditions per place. [2024-01-31 16:40:56,061 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 102 selfloop transitions, 7 changer transitions 0/116 dead transitions. [2024-01-31 16:40:56,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 116 transitions, 508 flow [2024-01-31 16:40:56,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:40:56,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:40:56,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-01-31 16:40:56,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993589743589743 [2024-01-31 16:40:56,064 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 104 flow. Second operand 8 states and 187 transitions. [2024-01-31 16:40:56,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 116 transitions, 508 flow [2024-01-31 16:40:56,067 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 16:40:56,068 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 139 flow [2024-01-31 16:40:56,068 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 16:40:56,069 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 13 predicate places. [2024-01-31 16:40:56,069 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 139 flow [2024-01-31 16:40:56,069 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 16:40:56,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:56,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:56,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-31 16:40:56,282 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 16:40:56,282 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 16:40:56,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:56,283 INFO L85 PathProgramCache]: Analyzing trace with hash -566933092, now seen corresponding path program 1 times [2024-01-31 16:40:56,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:56,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96987003] [2024-01-31 16:40:56,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:56,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:56,386 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 16:40:56,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:56,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96987003] [2024-01-31 16:40:56,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96987003] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:56,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:56,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:40:56,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139599978] [2024-01-31 16:40:56,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:56,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:40:56,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:56,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:40:56,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:40:56,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-01-31 16:40:56,389 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 16:40:56,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:56,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-01-31 16:40:56,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:56,602 INFO L124 PetriNetUnfolderBase]: 478/1027 cut-off events. [2024-01-31 16:40:56,602 INFO L125 PetriNetUnfolderBase]: For 425/425 co-relation queries the response was YES. [2024-01-31 16:40:56,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2406 conditions, 1027 events. 478/1027 cut-off events. For 425/425 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4359 event pairs, 129 based on Foata normal form. 58/1034 useless extension candidates. Maximal degree in co-relation 1702. Up to 569 conditions per place. [2024-01-31 16:40:56,607 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 39 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-01-31 16:40:56,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 291 flow [2024-01-31 16:40:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:40:56,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:40:56,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-01-31 16:40:56,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982905982905983 [2024-01-31 16:40:56,621 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 139 flow. Second operand 3 states and 70 transitions. [2024-01-31 16:40:56,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 291 flow [2024-01-31 16:40:56,624 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 16:40:56,625 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 136 flow [2024-01-31 16:40:56,625 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 16:40:56,625 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 12 predicate places. [2024-01-31 16:40:56,626 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 136 flow [2024-01-31 16:40:56,626 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 16:40:56,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:56,626 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:56,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:40:56,626 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 16:40:56,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:56,628 INFO L85 PathProgramCache]: Analyzing trace with hash 104010194, now seen corresponding path program 1 times [2024-01-31 16:40:56,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:56,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047374365] [2024-01-31 16:40:56,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:56,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:56,777 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 16:40:56,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:56,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047374365] [2024-01-31 16:40:56,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047374365] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:56,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585935492] [2024-01-31 16:40:56,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:56,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:56,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:56,785 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 16:40:56,812 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 16:40:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:56,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 16:40:56,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:56,905 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 16:40:56,954 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 16:40:56,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:40:57,007 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 16:40:57,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585935492] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:40:57,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:40:57,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-01-31 16:40:57,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226097213] [2024-01-31 16:40:57,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:40:57,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:40:57,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:57,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:40:57,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:40:57,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:40:57,016 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 16:40:57,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:57,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:40:57,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:57,444 INFO L124 PetriNetUnfolderBase]: 1402/2785 cut-off events. [2024-01-31 16:40:57,444 INFO L125 PetriNetUnfolderBase]: For 1345/1345 co-relation queries the response was YES. [2024-01-31 16:40:57,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6965 conditions, 2785 events. 1402/2785 cut-off events. For 1345/1345 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 15165 event pairs, 211 based on Foata normal form. 40/2772 useless extension candidates. Maximal degree in co-relation 6062. Up to 527 conditions per place. [2024-01-31 16:40:57,461 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 141 selfloop transitions, 19 changer transitions 3/170 dead transitions. [2024-01-31 16:40:57,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 170 transitions, 911 flow [2024-01-31 16:40:57,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:40:57,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:40:57,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-01-31 16:40:57,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5598290598290598 [2024-01-31 16:40:57,464 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 136 flow. Second operand 12 states and 262 transitions. [2024-01-31 16:40:57,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 170 transitions, 911 flow [2024-01-31 16:40:57,468 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 16:40:57,470 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 266 flow [2024-01-31 16:40:57,471 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 16:40:57,472 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 28 predicate places. [2024-01-31 16:40:57,472 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 266 flow [2024-01-31 16:40:57,473 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 16:40:57,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:57,473 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 16:40:57,489 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 16:40:57,686 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 16:40:57,687 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 16:40:57,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:57,688 INFO L85 PathProgramCache]: Analyzing trace with hash 955453007, now seen corresponding path program 1 times [2024-01-31 16:40:57,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:57,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094506754] [2024-01-31 16:40:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:57,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:57,782 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 16:40:57,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:57,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094506754] [2024-01-31 16:40:57,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094506754] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:57,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:57,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:40:57,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679830764] [2024-01-31 16:40:57,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:57,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:40:57,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:57,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:40:57,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:40:57,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-01-31 16:40:57,787 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 16:40:57,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:57,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-01-31 16:40:57,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:58,142 INFO L124 PetriNetUnfolderBase]: 1790/3647 cut-off events. [2024-01-31 16:40:58,143 INFO L125 PetriNetUnfolderBase]: For 2553/2557 co-relation queries the response was YES. [2024-01-31 16:40:58,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9421 conditions, 3647 events. 1790/3647 cut-off events. For 2553/2557 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 22555 event pairs, 809 based on Foata normal form. 84/3632 useless extension candidates. Maximal degree in co-relation 7760. Up to 2339 conditions per place. [2024-01-31 16:40:58,165 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 94 selfloop transitions, 3 changer transitions 0/111 dead transitions. [2024-01-31 16:40:58,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 111 transitions, 777 flow [2024-01-31 16:40:58,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:40:58,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:40:58,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-01-31 16:40:58,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-01-31 16:40:58,167 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 266 flow. Second operand 4 states and 94 transitions. [2024-01-31 16:40:58,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 111 transitions, 777 flow [2024-01-31 16:40:58,177 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 16:40:58,178 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 272 flow [2024-01-31 16:40:58,178 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 16:40:58,179 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 32 predicate places. [2024-01-31 16:40:58,179 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 272 flow [2024-01-31 16:40:58,179 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 16:40:58,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:58,179 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 16:40:58,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:40:58,180 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 16:40:58,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:58,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1512258483, now seen corresponding path program 1 times [2024-01-31 16:40:58,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:58,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888380335] [2024-01-31 16:40:58,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:58,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:58,506 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 16:40:58,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:58,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888380335] [2024-01-31 16:40:58,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888380335] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:58,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:58,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:40:58,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117086663] [2024-01-31 16:40:58,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:58,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:40:58,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:58,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:40:58,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:40:58,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:40:58,513 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 16:40:58,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:58,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:40:58,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:59,121 INFO L124 PetriNetUnfolderBase]: 1839/3618 cut-off events. [2024-01-31 16:40:59,122 INFO L125 PetriNetUnfolderBase]: For 3574/3574 co-relation queries the response was YES. [2024-01-31 16:40:59,129 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 21242 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 16:40:59,142 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 89 selfloop transitions, 7 changer transitions 0/103 dead transitions. [2024-01-31 16:40:59,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 103 transitions, 642 flow [2024-01-31 16:40:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:40:59,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:40:59,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-01-31 16:40:59,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018315018315018 [2024-01-31 16:40:59,143 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 272 flow. Second operand 7 states and 137 transitions. [2024-01-31 16:40:59,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 103 transitions, 642 flow [2024-01-31 16:40:59,151 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 16:40:59,152 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 327 flow [2024-01-31 16:40:59,152 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 16:40:59,153 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 40 predicate places. [2024-01-31 16:40:59,153 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 327 flow [2024-01-31 16:40:59,153 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 16:40:59,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:59,153 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 16:40:59,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:40:59,154 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 16:40:59,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:59,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1578851608, now seen corresponding path program 1 times [2024-01-31 16:40:59,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:59,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401869009] [2024-01-31 16:40:59,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:59,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:59,266 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 16:40:59,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:59,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401869009] [2024-01-31 16:40:59,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401869009] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:59,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870866859] [2024-01-31 16:40:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:59,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:59,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:59,268 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 16:40:59,309 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 16:40:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:59,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 16:40:59,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:59,454 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 16:40:59,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:40:59,993 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 16:40:59,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870866859] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:40:59,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:40:59,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-01-31 16:40:59,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765324385] [2024-01-31 16:40:59,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:40:59,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:40:59,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:59,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:40:59,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:41:00,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-01-31 16:41:00,008 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 16:41:00,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:00,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-01-31 16:41:00,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:01,168 INFO L124 PetriNetUnfolderBase]: 3832/8637 cut-off events. [2024-01-31 16:41:01,168 INFO L125 PetriNetUnfolderBase]: For 9365/9373 co-relation queries the response was YES. [2024-01-31 16:41:01,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23528 conditions, 8637 events. 3832/8637 cut-off events. For 9365/9373 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 66640 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 16:41:01,331 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 212 selfloop transitions, 11 changer transitions 0/237 dead transitions. [2024-01-31 16:41:01,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 237 transitions, 1814 flow [2024-01-31 16:41:01,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:41:01,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:41:01,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-01-31 16:41:01,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6593406593406593 [2024-01-31 16:41:01,341 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 327 flow. Second operand 7 states and 180 transitions. [2024-01-31 16:41:01,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 237 transitions, 1814 flow [2024-01-31 16:41:01,380 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 16:41:01,398 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 427 flow [2024-01-31 16:41:01,398 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 16:41:01,399 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 48 predicate places. [2024-01-31 16:41:01,399 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 427 flow [2024-01-31 16:41:01,399 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 16:41:01,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:01,399 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 16:41:01,414 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 16:41:01,614 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 16:41:01,614 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 16:41:01,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:01,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1588554674, now seen corresponding path program 1 times [2024-01-31 16:41:01,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:01,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081094406] [2024-01-31 16:41:01,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:01,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:02,226 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 16:41:02,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:02,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081094406] [2024-01-31 16:41:02,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081094406] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:02,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380148039] [2024-01-31 16:41:02,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:02,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:02,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:02,245 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 16:41:02,284 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 16:41:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:02,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 16:41:02,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:02,430 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 16:41:02,508 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 16:41:02,607 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 16:41:02,649 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 16:41:02,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:02,992 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 16:41:03,025 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 16:41:03,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380148039] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:03,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:03,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-01-31 16:41:03,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836980178] [2024-01-31 16:41:03,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:03,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:41:03,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:03,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:41:03,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:41:03,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:41:03,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 427 flow. Second operand has 20 states, 20 states have (on average 12.15) internal successors, (243), 20 states have internal predecessors, (243), 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 16:41:03,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:03,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:41:03,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:07,679 INFO L124 PetriNetUnfolderBase]: 11110/22436 cut-off events. [2024-01-31 16:41:07,688 INFO L125 PetriNetUnfolderBase]: For 47185/47199 co-relation queries the response was YES. [2024-01-31 16:41:07,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73762 conditions, 22436 events. 11110/22436 cut-off events. For 47185/47199 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 185730 event pairs, 1293 based on Foata normal form. 260/22611 useless extension candidates. Maximal degree in co-relation 58188. Up to 3825 conditions per place. [2024-01-31 16:41:07,867 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 483 selfloop transitions, 102 changer transitions 24/616 dead transitions. [2024-01-31 16:41:07,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 616 transitions, 4843 flow [2024-01-31 16:41:07,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-31 16:41:07,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-31 16:41:07,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 764 transitions. [2024-01-31 16:41:07,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155195681511471 [2024-01-31 16:41:07,871 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 427 flow. Second operand 38 states and 764 transitions. [2024-01-31 16:41:07,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 616 transitions, 4843 flow [2024-01-31 16:41:07,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 616 transitions, 4628 flow, removed 87 selfloop flow, removed 2 redundant places. [2024-01-31 16:41:07,976 INFO L231 Difference]: Finished difference. Result has 132 places, 157 transitions, 1298 flow [2024-01-31 16:41:07,976 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=38, PETRI_FLOW=1298, PETRI_PLACES=132, PETRI_TRANSITIONS=157} [2024-01-31 16:41:07,977 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 95 predicate places. [2024-01-31 16:41:07,977 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 157 transitions, 1298 flow [2024-01-31 16:41:07,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.15) internal successors, (243), 20 states have internal predecessors, (243), 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 16:41:07,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:07,978 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 16:41:08,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 16:41:08,191 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 16:41:08,191 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 16:41:08,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:08,193 INFO L85 PathProgramCache]: Analyzing trace with hash -768569091, now seen corresponding path program 1 times [2024-01-31 16:41:08,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:08,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457770871] [2024-01-31 16:41:08,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:08,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 16:41:08,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:08,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457770871] [2024-01-31 16:41:08,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457770871] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:08,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815133965] [2024-01-31 16:41:08,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:08,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:08,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:08,567 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 16:41:08,577 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 16:41:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:08,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:41:08,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:08,715 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 16:41:08,752 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 16:41:08,885 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 16:41:08,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:08,919 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 16:41:08,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815133965] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:08,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:08,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 14 [2024-01-31 16:41:08,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240932615] [2024-01-31 16:41:08,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:08,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 16:41:08,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:08,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 16:41:08,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:41:08,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:41:08,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 157 transitions, 1298 flow. Second operand has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 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 16:41:08,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:08,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:41:08,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:13,686 INFO L124 PetriNetUnfolderBase]: 16197/32719 cut-off events. [2024-01-31 16:41:13,686 INFO L125 PetriNetUnfolderBase]: For 111916/111998 co-relation queries the response was YES. [2024-01-31 16:41:13,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118209 conditions, 32719 events. 16197/32719 cut-off events. For 111916/111998 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 279434 event pairs, 2495 based on Foata normal form. 490/33204 useless extension candidates. Maximal degree in co-relation 106614. Up to 5510 conditions per place. [2024-01-31 16:41:13,984 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 400 selfloop transitions, 168 changer transitions 9/584 dead transitions. [2024-01-31 16:41:13,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 584 transitions, 5362 flow [2024-01-31 16:41:13,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 16:41:13,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 16:41:13,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 509 transitions. [2024-01-31 16:41:13,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5438034188034188 [2024-01-31 16:41:13,987 INFO L175 Difference]: Start difference. First operand has 132 places, 157 transitions, 1298 flow. Second operand 24 states and 509 transitions. [2024-01-31 16:41:13,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 584 transitions, 5362 flow [2024-01-31 16:41:14,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 584 transitions, 4922 flow, removed 217 selfloop flow, removed 3 redundant places. [2024-01-31 16:41:14,274 INFO L231 Difference]: Finished difference. Result has 165 places, 248 transitions, 2374 flow [2024-01-31 16:41:14,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2374, PETRI_PLACES=165, PETRI_TRANSITIONS=248} [2024-01-31 16:41:14,275 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 128 predicate places. [2024-01-31 16:41:14,275 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 248 transitions, 2374 flow [2024-01-31 16:41:14,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 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 16:41:14,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:14,276 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 16:41:14,287 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 16:41:14,487 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 16:41:14,487 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 16:41:14,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:14,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1213291707, now seen corresponding path program 1 times [2024-01-31 16:41:14,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:14,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512375674] [2024-01-31 16:41:14,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:14,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:15,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:15,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512375674] [2024-01-31 16:41:15,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512375674] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:15,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050313129] [2024-01-31 16:41:15,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:15,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:15,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:15,268 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 16:41:15,288 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 16:41:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:15,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2024-01-31 16:41:15,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:15,453 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 16:41:15,527 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 16:41:15,687 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 16:41:15,714 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 16:41:15,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:16,215 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [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 1 case distinctions, treesize of input 16 treesize of output 12 [2024-01-31 16:41:16,282 INFO L349 Elim1Store]: treesize reduction 8, result has 70.4 percent of original size [2024-01-31 16:41:16,282 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 124 treesize of output 111 [2024-01-31 16:41:16,427 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 16:41:16,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050313129] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:16,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:16,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2024-01-31 16:41:16,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123414420] [2024-01-31 16:41:16,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:16,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 16:41:16,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:16,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 16:41:16,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2024-01-31 16:41:16,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:41:16,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 248 transitions, 2374 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 16:41:16,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:16,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:41:16,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:25,620 INFO L124 PetriNetUnfolderBase]: 23694/47646 cut-off events. [2024-01-31 16:41:25,621 INFO L125 PetriNetUnfolderBase]: For 172411/172578 co-relation queries the response was YES. [2024-01-31 16:41:26,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175922 conditions, 47646 events. 23694/47646 cut-off events. For 172411/172578 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 423084 event pairs, 3859 based on Foata normal form. 416/48057 useless extension candidates. Maximal degree in co-relation 167725. Up to 7935 conditions per place. [2024-01-31 16:41:26,397 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 639 selfloop transitions, 313 changer transitions 48/1007 dead transitions. [2024-01-31 16:41:26,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 1007 transitions, 9404 flow [2024-01-31 16:41:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-01-31 16:41:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-01-31 16:41:26,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 1006 transitions. [2024-01-31 16:41:26,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4960552268244576 [2024-01-31 16:41:26,401 INFO L175 Difference]: Start difference. First operand has 165 places, 248 transitions, 2374 flow. Second operand 52 states and 1006 transitions. [2024-01-31 16:41:26,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 1007 transitions, 9404 flow [2024-01-31 16:41:27,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 1007 transitions, 9155 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-01-31 16:41:27,484 INFO L231 Difference]: Finished difference. Result has 233 places, 404 transitions, 4769 flow [2024-01-31 16:41:27,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2217, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=4769, PETRI_PLACES=233, PETRI_TRANSITIONS=404} [2024-01-31 16:41:27,488 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 196 predicate places. [2024-01-31 16:41:27,488 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 404 transitions, 4769 flow [2024-01-31 16:41:27,489 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 16:41:27,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:27,490 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2024-01-31 16:41:27,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 16:41:27,691 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 16:41:27,691 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 16:41:27,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:27,692 INFO L85 PathProgramCache]: Analyzing trace with hash -283823255, now seen corresponding path program 2 times [2024-01-31 16:41:27,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:27,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592451984] [2024-01-31 16:41:27,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:27,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:28,032 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 16:41:28,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:28,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592451984] [2024-01-31 16:41:28,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592451984] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:28,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525996697] [2024-01-31 16:41:28,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:41:28,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:28,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:28,034 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 16:41:28,035 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 16:41:28,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:41:28,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:41:28,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 16:41:28,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:28,189 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 16:41:28,218 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 16:41:28,241 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 16:41:28,265 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 16:41:28,293 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 16:41:28,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:28,519 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 16:41:28,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525996697] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:28,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:28,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-01-31 16:41:28,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655233664] [2024-01-31 16:41:28,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:28,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:41:28,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:28,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:41:28,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:41:28,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-31 16:41:28,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 404 transitions, 4769 flow. Second operand has 17 states, 17 states have (on average 13.529411764705882) internal successors, (230), 17 states have internal predecessors, (230), 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 16:41:28,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:28,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-31 16:41:28,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand