./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/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/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 19:51:58,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:51:58,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:51:58,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:51:58,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:51:58,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:51:58,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:51:58,127 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:51:58,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:51:58,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:51:58,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:51:58,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:51:58,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:51:58,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:51:58,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:51:58,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:51:58,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:51:58,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:51:58,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:51:58,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:51:58,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:51:58,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:51:58,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:51:58,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:51:58,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:51:58,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:51:58,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:51:58,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:51:58,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:51:58,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:51:58,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:51:58,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:51:58,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:51:58,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:51:58,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:51:58,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:51:58,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:51:58,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:51:58,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:51:58,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:51:58,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:51:58,180 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:51:58,218 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:51:58,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:51:58,219 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:51:58,219 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:51:58,220 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:51:58,220 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:51:58,221 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:51:58,221 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:51:58,221 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:51:58,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:51:58,222 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:51:58,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:51:58,222 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:51:58,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:51:58,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:51:58,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:51:58,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:51:58,223 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:51:58,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:51:58,223 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:51:58,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:51:58,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:51:58,224 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:51:58,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:51:58,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:51:58,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:51:58,225 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:51:58,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:51:58,225 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:51:58,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:51:58,225 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:51:58,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:51:58,226 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:51:58,226 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:51:58,226 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:51:58,226 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:51:58,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:51:58,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:51:58,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:51:58,531 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:51:58,531 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:51:58,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-08-30 19:51:59,711 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:51:59,903 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:51:59,903 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-08-30 19:51:59,909 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72e8c929f/ec42ea6116d44143a06919f5d71503d6/FLAGc7cd71d46 [2023-08-30 19:51:59,923 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72e8c929f/ec42ea6116d44143a06919f5d71503d6 [2023-08-30 19:51:59,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:51:59,927 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:51:59,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:51:59,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:51:59,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:51:59,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:51:59" (1/1) ... [2023-08-30 19:51:59,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@614564c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:51:59, skipping insertion in model container [2023-08-30 19:51:59,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:51:59" (1/1) ... [2023-08-30 19:51:59,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:51:59,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:52:00,156 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-08-30 19:52:00,171 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:52:00,183 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:52:00,219 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-08-30 19:52:00,232 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:52:00,248 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:52:00,249 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:52:00,254 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:52:00,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:52:00 WrapperNode [2023-08-30 19:52:00,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:52:00,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:52:00,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:52:00,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:52:00,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:52:00" (1/1) ... [2023-08-30 19:52:00,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:52:00" (1/1) ... [2023-08-30 19:52:00,324 INFO L138 Inliner]: procedures = 29, calls = 88, calls flagged for inlining = 22, calls inlined = 32, statements flattened = 403 [2023-08-30 19:52:00,325 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:52:00,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:52:00,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:52:00,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:52:00,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:52:00" (1/1) ... [2023-08-30 19:52:00,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:52:00" (1/1) ... [2023-08-30 19:52:00,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:52:00" (1/1) ... [2023-08-30 19:52:00,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:52:00" (1/1) ... [2023-08-30 19:52:00,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:52:00" (1/1) ... [2023-08-30 19:52:00,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:52:00" (1/1) ... [2023-08-30 19:52:00,378 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:52:00" (1/1) ... [2023-08-30 19:52:00,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:52:00" (1/1) ... [2023-08-30 19:52:00,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:52:00,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:52:00,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:52:00,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:52:00,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:52:00" (1/1) ... [2023-08-30 19:52:00,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:52:00,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:52:00,419 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 19:52:00,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 19:52:00,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:52:00,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:52:00,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:52:00,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:52:00,444 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:52:00,444 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:52:00,444 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:52:00,444 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:52:00,444 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 19:52:00,445 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 19:52:00,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 19:52:00,445 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 19:52:00,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:52:00,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-30 19:52:00,445 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-30 19:52:00,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-08-30 19:52:00,446 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-08-30 19:52:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 19:52:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 19:52:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 19:52:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:52:00,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:52:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:52:00,448 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 19:52:00,626 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:52:00,628 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:52:01,187 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:52:01,348 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:52:01,349 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 19:52:01,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:52:01 BoogieIcfgContainer [2023-08-30 19:52:01,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:52:01,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:52:01,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:52:01,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:52:01,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:51:59" (1/3) ... [2023-08-30 19:52:01,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1ee62b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:52:01, skipping insertion in model container [2023-08-30 19:52:01,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:52:00" (2/3) ... [2023-08-30 19:52:01,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1ee62b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:52:01, skipping insertion in model container [2023-08-30 19:52:01,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:52:01" (3/3) ... [2023-08-30 19:52:01,357 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-2.wvr.c [2023-08-30 19:52:01,363 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:52:01,371 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:52:01,371 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:52:01,371 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:52:01,503 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-30 19:52:01,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 306 places, 310 transitions, 692 flow [2023-08-30 19:52:01,648 INFO L130 PetriNetUnfolder]: 21/266 cut-off events. [2023-08-30 19:52:01,649 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 19:52:01,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 266 events. 21/266 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 309 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 228. Up to 3 conditions per place. [2023-08-30 19:52:01,657 INFO L82 GeneralOperation]: Start removeDead. Operand has 306 places, 310 transitions, 692 flow [2023-08-30 19:52:01,666 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 256 places, 258 transitions, 564 flow [2023-08-30 19:52:01,669 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:52:01,681 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 256 places, 258 transitions, 564 flow [2023-08-30 19:52:01,683 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 256 places, 258 transitions, 564 flow [2023-08-30 19:52:01,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 258 transitions, 564 flow [2023-08-30 19:52:01,753 INFO L130 PetriNetUnfolder]: 21/258 cut-off events. [2023-08-30 19:52:01,753 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 19:52:01,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 258 events. 21/258 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 306 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 228. Up to 3 conditions per place. [2023-08-30 19:52:01,763 INFO L119 LiptonReduction]: Number of co-enabled transitions 8992 [2023-08-30 19:52:08,957 INFO L134 LiptonReduction]: Checked pairs total: 29590 [2023-08-30 19:52:08,957 INFO L136 LiptonReduction]: Total number of compositions: 237 [2023-08-30 19:52:08,968 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:52:08,973 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@58fa3733, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:52:08,973 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-30 19:52:08,983 INFO L130 PetriNetUnfolder]: 9/60 cut-off events. [2023-08-30 19:52:08,984 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 19:52:08,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:52:08,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:52:08,985 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-30 19:52:08,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:52:08,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1294203465, now seen corresponding path program 1 times [2023-08-30 19:52:08,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:52:08,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726205899] [2023-08-30 19:52:08,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:52:08,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:52:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:52:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:52:09,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:52:09,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726205899] [2023-08-30 19:52:09,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726205899] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:52:09,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:52:09,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:52:09,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995289453] [2023-08-30 19:52:09,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:52:09,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:52:09,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:52:09,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:52:09,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:52:09,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 551 [2023-08-30 19:52:09,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 263.5) internal successors, (1054), 4 states have internal predecessors, (1054), 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) [2023-08-30 19:52:09,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:52:09,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 551 [2023-08-30 19:52:09,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:52:10,620 INFO L130 PetriNetUnfolder]: 4669/6705 cut-off events. [2023-08-30 19:52:10,621 INFO L131 PetriNetUnfolder]: For 1489/1489 co-relation queries the response was YES. [2023-08-30 19:52:10,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14639 conditions, 6705 events. 4669/6705 cut-off events. For 1489/1489 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 31411 event pairs, 3014 based on Foata normal form. 36/4933 useless extension candidates. Maximal degree in co-relation 7761. Up to 3367 conditions per place. [2023-08-30 19:52:10,648 INFO L137 encePairwiseOnDemand]: 545/551 looper letters, 38 selfloop transitions, 2 changer transitions 31/93 dead transitions. [2023-08-30 19:52:10,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 421 flow [2023-08-30 19:52:10,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:52:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:52:10,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1098 transitions. [2023-08-30 19:52:10,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981851179673321 [2023-08-30 19:52:10,663 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1098 transitions. [2023-08-30 19:52:10,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1098 transitions. [2023-08-30 19:52:10,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:52:10,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1098 transitions. [2023-08-30 19:52:10,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 274.5) internal successors, (1098), 4 states have internal predecessors, (1098), 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) [2023-08-30 19:52:10,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 551.0) internal successors, (2755), 5 states have internal predecessors, (2755), 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) [2023-08-30 19:52:10,681 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 551.0) internal successors, (2755), 5 states have internal predecessors, (2755), 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) [2023-08-30 19:52:10,682 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 170 flow. Second operand 4 states and 1098 transitions. [2023-08-30 19:52:10,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 421 flow [2023-08-30 19:52:10,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 93 transitions, 359 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-30 19:52:10,722 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 156 flow [2023-08-30 19:52:10,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2023-08-30 19:52:10,727 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-08-30 19:52:10,727 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 156 flow [2023-08-30 19:52:10,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 263.5) internal successors, (1054), 4 states have internal predecessors, (1054), 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) [2023-08-30 19:52:10,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:52:10,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:52:10,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 19:52:10,729 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-30 19:52:10,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:52:10,730 INFO L85 PathProgramCache]: Analyzing trace with hash 117533720, now seen corresponding path program 1 times [2023-08-30 19:52:10,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:52:10,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520353593] [2023-08-30 19:52:10,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:52:10,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:52:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:52:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:52:11,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:52:11,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520353593] [2023-08-30 19:52:11,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520353593] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:52:11,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132442999] [2023-08-30 19:52:11,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:52:11,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:52:11,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:52:11,449 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) [2023-08-30 19:52:11,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 19:52:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:52:11,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 19:52:11,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:52:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:52:12,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:52:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:52:12,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132442999] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:52:12,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:52:12,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 13 [2023-08-30 19:52:12,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157725390] [2023-08-30 19:52:12,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:52:12,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:52:12,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:52:12,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:52:12,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-08-30 19:52:12,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 551 [2023-08-30 19:52:12,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 254.2) internal successors, (1271), 5 states have internal predecessors, (1271), 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) [2023-08-30 19:52:12,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:52:12,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 551 [2023-08-30 19:52:12,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:52:13,533 INFO L130 PetriNetUnfolder]: 5283/7284 cut-off events. [2023-08-30 19:52:13,534 INFO L131 PetriNetUnfolder]: For 1133/1141 co-relation queries the response was YES. [2023-08-30 19:52:13,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15431 conditions, 7284 events. 5283/7284 cut-off events. For 1133/1141 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 31914 event pairs, 2115 based on Foata normal form. 5/5876 useless extension candidates. Maximal degree in co-relation 15419. Up to 4193 conditions per place. [2023-08-30 19:52:13,572 INFO L137 encePairwiseOnDemand]: 543/551 looper letters, 81 selfloop transitions, 8 changer transitions 9/120 dead transitions. [2023-08-30 19:52:13,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 120 transitions, 504 flow [2023-08-30 19:52:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:52:13,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:52:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1338 transitions. [2023-08-30 19:52:13,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48566243194192377 [2023-08-30 19:52:13,576 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1338 transitions. [2023-08-30 19:52:13,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1338 transitions. [2023-08-30 19:52:13,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:52:13,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1338 transitions. [2023-08-30 19:52:13,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 267.6) internal successors, (1338), 5 states have internal predecessors, (1338), 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) [2023-08-30 19:52:13,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 551.0) internal successors, (3306), 6 states have internal predecessors, (3306), 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) [2023-08-30 19:52:13,586 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 551.0) internal successors, (3306), 6 states have internal predecessors, (3306), 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) [2023-08-30 19:52:13,586 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 156 flow. Second operand 5 states and 1338 transitions. [2023-08-30 19:52:13,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 120 transitions, 504 flow [2023-08-30 19:52:13,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 120 transitions, 494 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 19:52:13,597 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 211 flow [2023-08-30 19:52:13,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2023-08-30 19:52:13,598 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-08-30 19:52:13,598 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 211 flow [2023-08-30 19:52:13,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 254.2) internal successors, (1271), 5 states have internal predecessors, (1271), 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) [2023-08-30 19:52:13,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:52:13,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:52:13,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 19:52:13,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:52:13,804 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-30 19:52:13,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:52:13,805 INFO L85 PathProgramCache]: Analyzing trace with hash 918312716, now seen corresponding path program 2 times [2023-08-30 19:52:13,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:52:13,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101569265] [2023-08-30 19:52:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:52:13,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:52:13,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:52:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:52:14,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:52:14,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101569265] [2023-08-30 19:52:14,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101569265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:52:14,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860969321] [2023-08-30 19:52:14,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:52:14,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:52:14,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:52:14,417 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) [2023-08-30 19:52:14,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 19:52:14,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 19:52:14,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:52:14,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 19:52:14,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:52:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:52:14,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:52:14,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860969321] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:52:14,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:52:14,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-08-30 19:52:14,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391208684] [2023-08-30 19:52:14,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:52:14,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 19:52:14,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:52:14,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 19:52:14,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 19:52:14,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 551 [2023-08-30 19:52:14,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 211 flow. Second operand has 6 states, 6 states have (on average 260.1666666666667) internal successors, (1561), 6 states have internal predecessors, (1561), 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) [2023-08-30 19:52:14,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:52:14,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 551 [2023-08-30 19:52:14,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:52:16,011 INFO L130 PetriNetUnfolder]: 7715/10366 cut-off events. [2023-08-30 19:52:16,011 INFO L131 PetriNetUnfolder]: For 4941/4993 co-relation queries the response was YES. [2023-08-30 19:52:16,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25631 conditions, 10366 events. 7715/10366 cut-off events. For 4941/4993 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 46113 event pairs, 2067 based on Foata normal form. 31/9569 useless extension candidates. Maximal degree in co-relation 25617. Up to 3712 conditions per place. [2023-08-30 19:52:16,069 INFO L137 encePairwiseOnDemand]: 542/551 looper letters, 106 selfloop transitions, 12 changer transitions 9/149 dead transitions. [2023-08-30 19:52:16,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 149 transitions, 690 flow [2023-08-30 19:52:16,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:52:16,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:52:16,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1655 transitions. [2023-08-30 19:52:16,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500604960677556 [2023-08-30 19:52:16,074 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1655 transitions. [2023-08-30 19:52:16,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1655 transitions. [2023-08-30 19:52:16,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:52:16,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1655 transitions. [2023-08-30 19:52:16,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 275.8333333333333) internal successors, (1655), 6 states have internal predecessors, (1655), 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) [2023-08-30 19:52:16,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 551.0) internal successors, (3857), 7 states have internal predecessors, (3857), 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) [2023-08-30 19:52:16,085 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 551.0) internal successors, (3857), 7 states have internal predecessors, (3857), 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) [2023-08-30 19:52:16,085 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 211 flow. Second operand 6 states and 1655 transitions. [2023-08-30 19:52:16,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 149 transitions, 690 flow [2023-08-30 19:52:16,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 149 transitions, 670 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-30 19:52:16,108 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 267 flow [2023-08-30 19:52:16,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2023-08-30 19:52:16,109 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2023-08-30 19:52:16,109 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 267 flow [2023-08-30 19:52:16,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 260.1666666666667) internal successors, (1561), 6 states have internal predecessors, (1561), 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) [2023-08-30 19:52:16,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:52:16,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:52:16,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 19:52:16,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-30 19:52:16,320 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-30 19:52:16,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:52:16,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1783620550, now seen corresponding path program 1 times [2023-08-30 19:52:16,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:52:16,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293653963] [2023-08-30 19:52:16,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:52:16,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:52:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:52:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:52:16,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:52:16,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293653963] [2023-08-30 19:52:16,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293653963] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:52:16,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389410843] [2023-08-30 19:52:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:52:16,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:52:16,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:52:16,603 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) [2023-08-30 19:52:16,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 19:52:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:52:16,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 19:52:16,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:52:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:52:16,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:52:16,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389410843] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:52:16,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:52:16,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-30 19:52:16,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980520851] [2023-08-30 19:52:16,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:52:16,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:52:16,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:52:16,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:52:16,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 19:52:16,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 551 [2023-08-30 19:52:16,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 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) [2023-08-30 19:52:16,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:52:16,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 551 [2023-08-30 19:52:16,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:52:18,189 INFO L130 PetriNetUnfolder]: 11863/15713 cut-off events. [2023-08-30 19:52:18,189 INFO L131 PetriNetUnfolder]: For 8889/9087 co-relation queries the response was YES. [2023-08-30 19:52:18,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39689 conditions, 15713 events. 11863/15713 cut-off events. For 8889/9087 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 72010 event pairs, 2155 based on Foata normal form. 164/14651 useless extension candidates. Maximal degree in co-relation 39666. Up to 7293 conditions per place. [2023-08-30 19:52:18,272 INFO L137 encePairwiseOnDemand]: 545/551 looper letters, 96 selfloop transitions, 11 changer transitions 2/131 dead transitions. [2023-08-30 19:52:18,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 131 transitions, 648 flow [2023-08-30 19:52:18,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:52:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:52:18,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1135 transitions. [2023-08-30 19:52:18,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51497277676951 [2023-08-30 19:52:18,275 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1135 transitions. [2023-08-30 19:52:18,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1135 transitions. [2023-08-30 19:52:18,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:52:18,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1135 transitions. [2023-08-30 19:52:18,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 283.75) internal successors, (1135), 4 states have internal predecessors, (1135), 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) [2023-08-30 19:52:18,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 551.0) internal successors, (2755), 5 states have internal predecessors, (2755), 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) [2023-08-30 19:52:18,283 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 551.0) internal successors, (2755), 5 states have internal predecessors, (2755), 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) [2023-08-30 19:52:18,283 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 267 flow. Second operand 4 states and 1135 transitions. [2023-08-30 19:52:18,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 131 transitions, 648 flow [2023-08-30 19:52:18,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 131 transitions, 635 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 19:52:18,327 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 301 flow [2023-08-30 19:52:18,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=301, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2023-08-30 19:52:18,328 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2023-08-30 19:52:18,328 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 301 flow [2023-08-30 19:52:18,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 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) [2023-08-30 19:52:18,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:52:18,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:52:18,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 19:52:18,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:52:18,535 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-30 19:52:18,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:52:18,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1944478364, now seen corresponding path program 1 times [2023-08-30 19:52:18,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:52:18,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561680491] [2023-08-30 19:52:18,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:52:18,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:52:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:52:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:52:18,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:52:18,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561680491] [2023-08-30 19:52:18,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561680491] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:52:18,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977903648] [2023-08-30 19:52:18,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:52:18,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:52:18,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:52:18,833 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) [2023-08-30 19:52:18,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 19:52:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:52:18,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 19:52:18,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:52:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:52:19,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:52:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:52:19,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977903648] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:52:19,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:52:19,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-30 19:52:19,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216861477] [2023-08-30 19:52:19,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:52:19,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 19:52:19,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:52:19,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 19:52:19,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-08-30 19:52:19,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 551 [2023-08-30 19:52:19,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 301 flow. Second operand has 9 states, 9 states have (on average 262.77777777777777) internal successors, (2365), 9 states have internal predecessors, (2365), 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) [2023-08-30 19:52:19,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:52:19,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 551 [2023-08-30 19:52:19,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:52:21,127 INFO L130 PetriNetUnfolder]: 15199/20692 cut-off events. [2023-08-30 19:52:21,127 INFO L131 PetriNetUnfolder]: For 25443/25613 co-relation queries the response was YES. [2023-08-30 19:52:21,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52360 conditions, 20692 events. 15199/20692 cut-off events. For 25443/25613 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 105822 event pairs, 2824 based on Foata normal form. 1074/20023 useless extension candidates. Maximal degree in co-relation 49911. Up to 10211 conditions per place. [2023-08-30 19:52:21,227 INFO L137 encePairwiseOnDemand]: 542/551 looper letters, 122 selfloop transitions, 18 changer transitions 68/230 dead transitions. [2023-08-30 19:52:21,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 230 transitions, 1136 flow [2023-08-30 19:52:21,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 19:52:21,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 19:52:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2996 transitions. [2023-08-30 19:52:21,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943078699884508 [2023-08-30 19:52:21,235 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2996 transitions. [2023-08-30 19:52:21,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2996 transitions. [2023-08-30 19:52:21,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:52:21,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2996 transitions. [2023-08-30 19:52:21,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 272.3636363636364) internal successors, (2996), 11 states have internal predecessors, (2996), 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) [2023-08-30 19:52:21,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 551.0) internal successors, (6612), 12 states have internal predecessors, (6612), 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) [2023-08-30 19:52:21,253 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 551.0) internal successors, (6612), 12 states have internal predecessors, (6612), 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) [2023-08-30 19:52:21,253 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 301 flow. Second operand 11 states and 2996 transitions. [2023-08-30 19:52:21,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 230 transitions, 1136 flow [2023-08-30 19:52:21,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 230 transitions, 1120 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 19:52:21,273 INFO L231 Difference]: Finished difference. Result has 88 places, 81 transitions, 356 flow [2023-08-30 19:52:21,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=356, PETRI_PLACES=88, PETRI_TRANSITIONS=81} [2023-08-30 19:52:21,275 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 17 predicate places. [2023-08-30 19:52:21,276 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 356 flow [2023-08-30 19:52:21,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 262.77777777777777) internal successors, (2365), 9 states have internal predecessors, (2365), 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) [2023-08-30 19:52:21,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:52:21,278 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:52:21,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 19:52:21,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:52:21,483 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-30 19:52:21,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:52:21,484 INFO L85 PathProgramCache]: Analyzing trace with hash -501703849, now seen corresponding path program 1 times [2023-08-30 19:52:21,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:52:21,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073840616] [2023-08-30 19:52:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:52:21,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:52:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:52:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:52:22,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:52:22,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073840616] [2023-08-30 19:52:22,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073840616] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:52:22,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185326887] [2023-08-30 19:52:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:52:22,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:52:22,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:52:22,777 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) [2023-08-30 19:52:22,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 19:52:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:52:22,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 74 conjunts are in the unsatisfiable core [2023-08-30 19:52:22,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:52:23,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 19:52:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:52:23,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:52:23,798 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:52:23,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2023-08-30 19:52:23,813 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 19:52:23,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 14 [2023-08-30 19:52:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:52:24,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185326887] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:52:24,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:52:24,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2023-08-30 19:52:24,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110392976] [2023-08-30 19:52:24,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:52:24,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:52:24,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:52:24,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:52:24,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:52:24,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 551 [2023-08-30 19:52:24,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 81 transitions, 356 flow. Second operand has 18 states, 18 states have (on average 237.72222222222223) internal successors, (4279), 18 states have internal predecessors, (4279), 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) [2023-08-30 19:52:24,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:52:24,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 551 [2023-08-30 19:52:24,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:52:32,950 INFO L130 PetriNetUnfolder]: 65456/87003 cut-off events. [2023-08-30 19:52:32,950 INFO L131 PetriNetUnfolder]: For 89558/90137 co-relation queries the response was YES. [2023-08-30 19:52:33,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233976 conditions, 87003 events. 65456/87003 cut-off events. For 89558/90137 co-relation queries the response was YES. Maximal size of possible extension queue 1776. Compared 490236 event pairs, 6868 based on Foata normal form. 1980/82979 useless extension candidates. Maximal degree in co-relation 233961. Up to 13423 conditions per place. [2023-08-30 19:52:33,448 INFO L137 encePairwiseOnDemand]: 537/551 looper letters, 647 selfloop transitions, 170 changer transitions 81/915 dead transitions. [2023-08-30 19:52:33,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 915 transitions, 5169 flow [2023-08-30 19:52:33,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 19:52:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 19:52:33,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 9409 transitions. [2023-08-30 19:52:33,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4615195958208662 [2023-08-30 19:52:33,470 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 9409 transitions. [2023-08-30 19:52:33,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 9409 transitions. [2023-08-30 19:52:33,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:52:33,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 9409 transitions. [2023-08-30 19:52:33,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 254.2972972972973) internal successors, (9409), 37 states have internal predecessors, (9409), 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) [2023-08-30 19:52:33,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 551.0) internal successors, (20938), 38 states have internal predecessors, (20938), 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) [2023-08-30 19:52:33,521 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 551.0) internal successors, (20938), 38 states have internal predecessors, (20938), 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) [2023-08-30 19:52:33,521 INFO L175 Difference]: Start difference. First operand has 88 places, 81 transitions, 356 flow. Second operand 37 states and 9409 transitions. [2023-08-30 19:52:33,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 915 transitions, 5169 flow [2023-08-30 19:52:33,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 915 transitions, 5001 flow, removed 73 selfloop flow, removed 3 redundant places. [2023-08-30 19:52:33,730 INFO L231 Difference]: Finished difference. Result has 138 places, 258 transitions, 1990 flow [2023-08-30 19:52:33,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1990, PETRI_PLACES=138, PETRI_TRANSITIONS=258} [2023-08-30 19:52:33,731 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 67 predicate places. [2023-08-30 19:52:33,731 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 258 transitions, 1990 flow [2023-08-30 19:52:33,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 237.72222222222223) internal successors, (4279), 18 states have internal predecessors, (4279), 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) [2023-08-30 19:52:33,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:52:33,733 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:52:33,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 19:52:33,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:52:33,934 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-30 19:52:33,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:52:33,934 INFO L85 PathProgramCache]: Analyzing trace with hash 598885593, now seen corresponding path program 1 times [2023-08-30 19:52:33,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:52:33,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196450000] [2023-08-30 19:52:33,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:52:33,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:52:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:52:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:52:35,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:52:35,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196450000] [2023-08-30 19:52:35,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196450000] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:52:35,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263899891] [2023-08-30 19:52:35,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:52:35,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:52:35,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:52:35,233 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) [2023-08-30 19:52:35,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 19:52:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:52:35,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 87 conjunts are in the unsatisfiable core [2023-08-30 19:52:35,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:52:36,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:52:36,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 19:52:36,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 19:52:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:52:36,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:52:36,742 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:52:36,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 46 [2023-08-30 19:52:36,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 20 treesize of output 14 [2023-08-30 19:52:36,764 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 19:52:36,770 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 19:52:36,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-08-30 19:52:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:52:37,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263899891] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:52:37,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:52:37,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-30 19:52:37,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800458629] [2023-08-30 19:52:37,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:52:37,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 19:52:37,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:52:37,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 19:52:37,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=764, Unknown=1, NotChecked=0, Total=870 [2023-08-30 19:52:37,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 551 [2023-08-30 19:52:37,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 258 transitions, 1990 flow. Second operand has 30 states, 30 states have (on average 202.16666666666666) internal successors, (6065), 30 states have internal predecessors, (6065), 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) [2023-08-30 19:52:37,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:52:37,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 551 [2023-08-30 19:52:37,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:53:35,093 INFO L130 PetriNetUnfolder]: 195814/257199 cut-off events. [2023-08-30 19:53:35,093 INFO L131 PetriNetUnfolder]: For 441844/442032 co-relation queries the response was YES. [2023-08-30 19:53:36,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763011 conditions, 257199 events. 195814/257199 cut-off events. For 441844/442032 co-relation queries the response was YES. Maximal size of possible extension queue 4926. Compared 1585988 event pairs, 11171 based on Foata normal form. 965/241673 useless extension candidates. Maximal degree in co-relation 762974. Up to 28379 conditions per place. [2023-08-30 19:53:37,735 INFO L137 encePairwiseOnDemand]: 534/551 looper letters, 2097 selfloop transitions, 822 changer transitions 276/3206 dead transitions. [2023-08-30 19:53:37,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 3206 transitions, 21310 flow [2023-08-30 19:53:37,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2023-08-30 19:53:37,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2023-08-30 19:53:37,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 30132 transitions. [2023-08-30 19:53:37,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39627554643730767 [2023-08-30 19:53:37,780 INFO L72 ComplementDD]: Start complementDD. Operand 138 states and 30132 transitions. [2023-08-30 19:53:37,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 138 states and 30132 transitions. [2023-08-30 19:53:37,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:53:37,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 138 states and 30132 transitions. [2023-08-30 19:53:37,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 139 states, 138 states have (on average 218.34782608695653) internal successors, (30132), 138 states have internal predecessors, (30132), 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) [2023-08-30 19:53:37,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 139 states, 139 states have (on average 551.0) internal successors, (76589), 139 states have internal predecessors, (76589), 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) [2023-08-30 19:53:37,920 INFO L81 ComplementDD]: Finished complementDD. Result has 139 states, 139 states have (on average 551.0) internal successors, (76589), 139 states have internal predecessors, (76589), 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) [2023-08-30 19:53:37,920 INFO L175 Difference]: Start difference. First operand has 138 places, 258 transitions, 1990 flow. Second operand 138 states and 30132 transitions. [2023-08-30 19:53:37,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 3206 transitions, 21310 flow [2023-08-30 19:53:48,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 3206 transitions, 19780 flow, removed 649 selfloop flow, removed 14 redundant places. [2023-08-30 19:53:48,930 INFO L231 Difference]: Finished difference. Result has 344 places, 957 transitions, 9238 flow [2023-08-30 19:53:48,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=138, PETRI_FLOW=9238, PETRI_PLACES=344, PETRI_TRANSITIONS=957} [2023-08-30 19:53:48,931 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 273 predicate places. [2023-08-30 19:53:48,932 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 957 transitions, 9238 flow [2023-08-30 19:53:48,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 202.16666666666666) internal successors, (6065), 30 states have internal predecessors, (6065), 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) [2023-08-30 19:53:48,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:53:48,933 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:53:48,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 19:53:49,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:53:49,142 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-30 19:53:49,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:53:49,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1453018889, now seen corresponding path program 1 times [2023-08-30 19:53:49,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:53:49,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806012045] [2023-08-30 19:53:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:53:49,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:53:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:53:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:53:50,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:53:50,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806012045] [2023-08-30 19:53:50,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806012045] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:53:50,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867115364] [2023-08-30 19:53:50,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:53:50,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:53:50,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:53:50,270 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) [2023-08-30 19:53:50,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 19:53:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:53:50,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 74 conjunts are in the unsatisfiable core [2023-08-30 19:53:50,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:53:51,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 19:53:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:53:51,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:53:51,289 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:53:51,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2023-08-30 19:53:51,299 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 19:53:51,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 14 [2023-08-30 19:53:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:53:51,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867115364] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:53:51,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:53:51,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2023-08-30 19:53:51,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225986220] [2023-08-30 19:53:51,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:53:51,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:53:51,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:53:51,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:53:51,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:53:52,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 551 [2023-08-30 19:53:52,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 957 transitions, 9238 flow. Second operand has 18 states, 18 states have (on average 237.55555555555554) internal successors, (4276), 18 states have internal predecessors, (4276), 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) [2023-08-30 19:53:52,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:53:52,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 551 [2023-08-30 19:53:52,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:55:08,645 INFO L130 PetriNetUnfolder]: 248019/329334 cut-off events. [2023-08-30 19:55:08,645 INFO L131 PetriNetUnfolder]: For 7130875/7132295 co-relation queries the response was YES. [2023-08-30 19:55:16,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1275244 conditions, 329334 events. 248019/329334 cut-off events. For 7130875/7132295 co-relation queries the response was YES. Maximal size of possible extension queue 6829. Compared 2157000 event pairs, 31308 based on Foata normal form. 478/306211 useless extension candidates. Maximal degree in co-relation 1275126. Up to 92604 conditions per place. [2023-08-30 19:55:18,248 INFO L137 encePairwiseOnDemand]: 536/551 looper letters, 1548 selfloop transitions, 513 changer transitions 133/2213 dead transitions. [2023-08-30 19:55:18,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 2213 transitions, 24822 flow [2023-08-30 19:55:18,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 19:55:18,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 19:55:18,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 11153 transitions. [2023-08-30 19:55:18,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46003134796238243 [2023-08-30 19:55:18,260 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 11153 transitions. [2023-08-30 19:55:18,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 11153 transitions. [2023-08-30 19:55:18,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:55:18,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 11153 transitions. [2023-08-30 19:55:18,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 253.47727272727272) internal successors, (11153), 44 states have internal predecessors, (11153), 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) [2023-08-30 19:55:18,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 551.0) internal successors, (24795), 45 states have internal predecessors, (24795), 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) [2023-08-30 19:55:18,292 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 551.0) internal successors, (24795), 45 states have internal predecessors, (24795), 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) [2023-08-30 19:55:18,293 INFO L175 Difference]: Start difference. First operand has 344 places, 957 transitions, 9238 flow. Second operand 44 states and 11153 transitions. [2023-08-30 19:55:18,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 2213 transitions, 24822 flow [2023-08-30 19:56:47,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 2213 transitions, 22960 flow, removed 922 selfloop flow, removed 21 redundant places. [2023-08-30 19:56:47,852 INFO L231 Difference]: Finished difference. Result has 377 places, 1358 transitions, 16907 flow [2023-08-30 19:56:47,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=8112, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=957, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=16907, PETRI_PLACES=377, PETRI_TRANSITIONS=1358} [2023-08-30 19:56:47,853 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 306 predicate places. [2023-08-30 19:56:47,853 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 1358 transitions, 16907 flow [2023-08-30 19:56:47,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 237.55555555555554) internal successors, (4276), 18 states have internal predecessors, (4276), 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) [2023-08-30 19:56:47,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:56:47,854 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:56:47,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 19:56:48,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:56:48,055 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-30 19:56:48,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:56:48,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1373975253, now seen corresponding path program 2 times [2023-08-30 19:56:48,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:56:48,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131852825] [2023-08-30 19:56:48,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:56:48,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:56:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:56:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:56:49,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:56:49,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131852825] [2023-08-30 19:56:49,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131852825] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:56:49,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22715102] [2023-08-30 19:56:49,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:56:49,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:56:49,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:56:49,265 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:56:49,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 19:56:49,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:56:49,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:56:49,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 95 conjunts are in the unsatisfiable core [2023-08-30 19:56:49,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:56:49,556 INFO L350 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 13 treesize of output 9 [2023-08-30 19:56:49,627 INFO L350 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 6 treesize of output 5 [2023-08-30 19:56:49,865 INFO L350 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 6 treesize of output 5 [2023-08-30 19:56:49,968 INFO L350 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 6 treesize of output 5 [2023-08-30 19:56:50,160 INFO L350 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 6 treesize of output 5 [2023-08-30 19:56:50,279 INFO L350 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 6 treesize of output 5 [2023-08-30 19:56:50,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:56:50,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 19:56:50,591 INFO L350 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 19 treesize of output 7 [2023-08-30 19:56:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:56:50,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:56:51,249 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~x~0.offset 4 (* c_~i1~0 4))) (.cse1 (+ c_~x~0.offset 4 (* c_~i2~0 4)))) (and (forall ((v_ArrVal_616 (Array Int Int)) (v_ArrVal_618 (Array Int Int)) (v_ArrVal_617 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_thread4Thread1of1ForFork0_~#t5~0#1.base| v_ArrVal_616) |c_thread1Thread1of1ForFork3_~#t3~0#1.base| v_ArrVal_617))) (<= (+ c_~s22~0 c_~s12~0 (select (select .cse0 c_~x~0.base) .cse1)) (+ c_~s11~0 (select (select (store .cse0 |c_thread4Thread1of1ForFork0_~#t6~0#1.base| v_ArrVal_618) c_~x~0.base) .cse2) c_~s21~0)))) (forall ((v_ArrVal_616 (Array Int Int)) (v_ArrVal_618 (Array Int Int)) (v_ArrVal_617 (Array Int Int))) (let ((.cse3 (store (store |c_#memory_int| |c_thread4Thread1of1ForFork0_~#t5~0#1.base| v_ArrVal_616) |c_thread1Thread1of1ForFork3_~#t3~0#1.base| v_ArrVal_617))) (< (+ c_~s11~0 (select (select (store .cse3 |c_thread4Thread1of1ForFork0_~#t6~0#1.base| v_ArrVal_618) c_~x~0.base) .cse2) c_~s21~0) (+ c_~s22~0 c_~s12~0 (select (select .cse3 c_~x~0.base) .cse1) 1)))))) is different from false