/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_unsafe-11.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 14:19:14,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 14:19:14,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 14:19:14,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 14:19:14,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 14:19:14,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 14:19:14,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 14:19:14,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 14:19:14,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 14:19:14,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 14:19:14,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 14:19:14,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 14:19:14,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 14:19:14,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 14:19:14,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 14:19:14,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 14:19:14,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 14:19:14,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 14:19:14,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 14:19:14,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 14:19:14,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 14:19:14,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 14:19:14,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 14:19:14,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 14:19:14,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 14:19:14,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 14:19:14,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 14:19:14,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 14:19:14,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 14:19:14,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 14:19:14,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 14:19:14,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 14:19:14,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 14:19:14,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 14:19:14,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 14:19:14,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 14:19:14,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 14:19:14,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 14:19:14,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 14:19:14,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 14:19:14,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 14:19:14,232 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-12 14:19:14,258 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 14:19:14,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 14:19:14,259 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 14:19:14,259 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 14:19:14,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 14:19:14,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 14:19:14,261 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 14:19:14,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 14:19:14,261 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 14:19:14,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 14:19:14,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 14:19:14,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 14:19:14,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 14:19:14,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 14:19:14,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 14:19:14,262 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 14:19:14,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 14:19:14,262 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 14:19:14,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 14:19:14,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 14:19:14,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 14:19:14,263 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 14:19:14,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 14:19:14,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 14:19:14,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 14:19:14,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 14:19:14,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 14:19:14,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 14:19:14,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 14:19:14,264 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 14:19:14,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-12 14:19:14,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 14:19:14,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 14:19:14,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 14:19:14,551 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 14:19:14,552 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 14:19:14,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-11.i [2022-12-12 14:19:15,496 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 14:19:15,721 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 14:19:15,722 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-11.i [2022-12-12 14:19:15,731 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5071b2501/2812a969ec3f4c1e84626a53668e1e76/FLAG665808b5c [2022-12-12 14:19:15,740 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5071b2501/2812a969ec3f4c1e84626a53668e1e76 [2022-12-12 14:19:15,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 14:19:15,743 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 14:19:15,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 14:19:15,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 14:19:15,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 14:19:15,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 02:19:15" (1/1) ... [2022-12-12 14:19:15,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59ac1a25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:19:15, skipping insertion in model container [2022-12-12 14:19:15,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 02:19:15" (1/1) ... [2022-12-12 14:19:15,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 14:19:15,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 14:19:16,033 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-11.i[30243,30256] [2022-12-12 14:19:16,040 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 14:19:16,040 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 14:19:16,043 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 14:19:16,044 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 14:19:16,047 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 14:19:16,048 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 14:19:16,048 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 14:19:16,048 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 14:19:16,051 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 14:19:16,052 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 14:19:16,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 14:19:16,060 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 14:19:16,091 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-11.i[30243,30256] [2022-12-12 14:19:16,092 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 14:19:16,092 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 14:19:16,093 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 14:19:16,093 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 14:19:16,095 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 14:19:16,102 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 14:19:16,102 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 14:19:16,103 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 14:19:16,104 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 14:19:16,105 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 14:19:16,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 14:19:16,139 INFO L208 MainTranslator]: Completed translation [2022-12-12 14:19:16,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:19:16 WrapperNode [2022-12-12 14:19:16,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 14:19:16,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 14:19:16,141 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 14:19:16,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 14:19:16,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:19:16" (1/1) ... [2022-12-12 14:19:16,171 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:19:16" (1/1) ... [2022-12-12 14:19:16,191 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-12 14:19:16,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 14:19:16,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 14:19:16,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 14:19:16,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 14:19:16,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:19:16" (1/1) ... [2022-12-12 14:19:16,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:19:16" (1/1) ... [2022-12-12 14:19:16,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:19:16" (1/1) ... [2022-12-12 14:19:16,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:19:16" (1/1) ... [2022-12-12 14:19:16,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:19:16" (1/1) ... [2022-12-12 14:19:16,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:19:16" (1/1) ... [2022-12-12 14:19:16,222 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:19:16" (1/1) ... [2022-12-12 14:19:16,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:19:16" (1/1) ... [2022-12-12 14:19:16,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 14:19:16,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 14:19:16,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 14:19:16,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 14:19:16,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:19:16" (1/1) ... [2022-12-12 14:19:16,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 14:19:16,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:19:16,261 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) [2022-12-12 14:19:16,279 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 [2022-12-12 14:19:16,291 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-12 14:19:16,291 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-12 14:19:16,291 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-12 14:19:16,292 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-12 14:19:16,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 14:19:16,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 14:19:16,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 14:19:16,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 14:19:16,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 14:19:16,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 14:19:16,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 14:19:16,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 14:19:16,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 14:19:16,294 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 14:19:16,440 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 14:19:16,442 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 14:19:16,555 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 14:19:16,559 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 14:19:16,559 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-12 14:19:16,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 02:19:16 BoogieIcfgContainer [2022-12-12 14:19:16,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 14:19:16,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 14:19:16,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 14:19:16,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 14:19:16,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 02:19:15" (1/3) ... [2022-12-12 14:19:16,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@740a6247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 02:19:16, skipping insertion in model container [2022-12-12 14:19:16,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:19:16" (2/3) ... [2022-12-12 14:19:16,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@740a6247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 02:19:16, skipping insertion in model container [2022-12-12 14:19:16,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 02:19:16" (3/3) ... [2022-12-12 14:19:16,566 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-11.i [2022-12-12 14:19:16,579 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 14:19:16,579 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 14:19:16,579 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 14:19:16,614 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-12 14:19:16,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 93 transitions, 196 flow [2022-12-12 14:19:16,676 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-12 14:19:16,676 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-12 14:19:16,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 91 events. 7/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 65. Up to 2 conditions per place. [2022-12-12 14:19:16,680 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 93 transitions, 196 flow [2022-12-12 14:19:16,686 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 91 transitions, 188 flow [2022-12-12 14:19:16,688 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 14:19:16,704 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 91 transitions, 188 flow [2022-12-12 14:19:16,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 91 transitions, 188 flow [2022-12-12 14:19:16,724 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-12 14:19:16,724 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-12 14:19:16,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 91 events. 7/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 65. Up to 2 conditions per place. [2022-12-12 14:19:16,727 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 91 transitions, 188 flow [2022-12-12 14:19:16,727 INFO L226 LiptonReduction]: Number of co-enabled transitions 1914 [2022-12-12 14:19:19,396 INFO L241 LiptonReduction]: Total number of compositions: 79 [2022-12-12 14:19:19,407 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 14:19:19,411 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@659cca90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 14:19:19,411 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 14:19:19,415 INFO L130 PetriNetUnfolder]: 3/26 cut-off events. [2022-12-12 14:19:19,415 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-12 14:19:19,415 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:19:19,416 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-12 14:19:19,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:19:19,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:19:19,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1807783243, now seen corresponding path program 1 times [2022-12-12 14:19:19,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:19:19,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900449093] [2022-12-12 14:19:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:19:19,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:19:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:19:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:19:19,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:19:19,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900449093] [2022-12-12 14:19:19,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900449093] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:19:19,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 14:19:19,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 14:19:19,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177294859] [2022-12-12 14:19:19,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:19:19,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 14:19:19,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:19:19,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 14:19:19,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 14:19:19,649 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-12 14:19:19,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2022-12-12 14:19:19,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:19:19,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-12 14:19:19,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:19:19,789 INFO L130 PetriNetUnfolder]: 657/1007 cut-off events. [2022-12-12 14:19:19,789 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-12 14:19:19,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2023 conditions, 1007 events. 657/1007 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4231 event pairs, 175 based on Foata normal form. 0/387 useless extension candidates. Maximal degree in co-relation 2013. Up to 641 conditions per place. [2022-12-12 14:19:19,799 INFO L137 encePairwiseOnDemand]: 24/28 looper letters, 38 selfloop transitions, 2 changer transitions 1/45 dead transitions. [2022-12-12 14:19:19,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 45 transitions, 178 flow [2022-12-12 14:19:19,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 14:19:19,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 14:19:19,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2022-12-12 14:19:19,810 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2022-12-12 14:19:19,811 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 62 flow. Second operand 3 states and 55 transitions. [2022-12-12 14:19:19,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 45 transitions, 178 flow [2022-12-12 14:19:19,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-12 14:19:19,816 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 70 flow [2022-12-12 14:19:19,817 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2022-12-12 14:19:19,822 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2022-12-12 14:19:19,822 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 70 flow [2022-12-12 14:19:19,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2022-12-12 14:19:19,822 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:19:19,822 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:19:19,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 14:19:19,823 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:19:19,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:19:19,825 INFO L85 PathProgramCache]: Analyzing trace with hash 206704716, now seen corresponding path program 1 times [2022-12-12 14:19:19,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:19:19,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005004151] [2022-12-12 14:19:19,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:19:19,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:19:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:19:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:19:19,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:19:19,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005004151] [2022-12-12 14:19:19,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005004151] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:19:19,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343964980] [2022-12-12 14:19:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:19:19,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:19:19,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:19:19,937 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) [2022-12-12 14:19:20,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 14:19:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:19:20,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-12 14:19:20,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:19:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:19:20,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:19:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:19:20,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343964980] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:19:20,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:19:20,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-12 14:19:20,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228893129] [2022-12-12 14:19:20,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:19:20,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 14:19:20,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:19:20,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 14:19:20,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-12 14:19:20,099 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-12 14:19:20,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 70 flow. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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) [2022-12-12 14:19:20,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:19:20,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-12 14:19:20,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:19:20,265 INFO L130 PetriNetUnfolder]: 913/1391 cut-off events. [2022-12-12 14:19:20,265 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-12 14:19:20,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3240 conditions, 1391 events. 913/1391 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5791 event pairs, 175 based on Foata normal form. 0/643 useless extension candidates. Maximal degree in co-relation 3229. Up to 449 conditions per place. [2022-12-12 14:19:20,272 INFO L137 encePairwiseOnDemand]: 25/28 looper letters, 86 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2022-12-12 14:19:20,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 95 transitions, 392 flow [2022-12-12 14:19:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 14:19:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 14:19:20,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2022-12-12 14:19:20,275 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7023809523809523 [2022-12-12 14:19:20,275 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 70 flow. Second operand 6 states and 118 transitions. [2022-12-12 14:19:20,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 95 transitions, 392 flow [2022-12-12 14:19:20,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 95 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-12 14:19:20,278 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 104 flow [2022-12-12 14:19:20,278 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=104, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2022-12-12 14:19:20,279 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2022-12-12 14:19:20,279 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 104 flow [2022-12-12 14:19:20,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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) [2022-12-12 14:19:20,282 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:19:20,282 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-12 14:19:20,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-12 14:19:20,486 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 [2022-12-12 14:19:20,487 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:19:20,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:19:20,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1043870325, now seen corresponding path program 2 times [2022-12-12 14:19:20,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:19:20,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845188264] [2022-12-12 14:19:20,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:19:20,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:19:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:19:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:19:20,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:19:20,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845188264] [2022-12-12 14:19:20,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845188264] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:19:20,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839011114] [2022-12-12 14:19:20,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 14:19:20,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:19:20,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:19:20,615 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) [2022-12-12 14:19:20,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 14:19:20,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 14:19:20,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:19:20,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 14:19:20,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:19:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:19:20,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:19:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:19:20,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839011114] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:19:20,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:19:20,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-12 14:19:20,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489992353] [2022-12-12 14:19:20,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:19:20,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 14:19:20,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:19:20,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 14:19:20,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-12 14:19:20,735 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-12 14:19:20,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 104 flow. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 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) [2022-12-12 14:19:20,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:19:20,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-12 14:19:20,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:19:21,010 INFO L130 PetriNetUnfolder]: 1681/2543 cut-off events. [2022-12-12 14:19:21,011 INFO L131 PetriNetUnfolder]: For 1552/1552 co-relation queries the response was YES. [2022-12-12 14:19:21,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6956 conditions, 2543 events. 1681/2543 cut-off events. For 1552/1552 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 10778 event pairs, 175 based on Foata normal form. 384/1667 useless extension candidates. Maximal degree in co-relation 6941. Up to 769 conditions per place. [2022-12-12 14:19:21,028 INFO L137 encePairwiseOnDemand]: 25/28 looper letters, 182 selfloop transitions, 11 changer transitions 0/197 dead transitions. [2022-12-12 14:19:21,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 197 transitions, 846 flow [2022-12-12 14:19:21,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 14:19:21,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 14:19:21,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2022-12-12 14:19:21,032 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7351190476190477 [2022-12-12 14:19:21,033 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 104 flow. Second operand 12 states and 247 transitions. [2022-12-12 14:19:21,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 197 transitions, 846 flow [2022-12-12 14:19:21,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 197 transitions, 832 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-12 14:19:21,041 INFO L231 Difference]: Finished difference. Result has 55 places, 37 transitions, 174 flow [2022-12-12 14:19:21,042 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=174, PETRI_PLACES=55, PETRI_TRANSITIONS=37} [2022-12-12 14:19:21,043 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 23 predicate places. [2022-12-12 14:19:21,043 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 37 transitions, 174 flow [2022-12-12 14:19:21,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 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) [2022-12-12 14:19:21,043 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:19:21,043 INFO L214 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-12 14:19:21,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-12 14:19:21,250 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 [2022-12-12 14:19:21,250 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:19:21,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:19:21,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2052466155, now seen corresponding path program 3 times [2022-12-12 14:19:21,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:19:21,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928356904] [2022-12-12 14:19:21,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:19:21,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:19:21,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:19:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:19:21,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:19:21,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928356904] [2022-12-12 14:19:21,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928356904] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:19:21,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831185269] [2022-12-12 14:19:21,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 14:19:21,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:19:21,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:19:21,438 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) [2022-12-12 14:19:21,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 14:19:21,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-12 14:19:21,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:19:21,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 14:19:21,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:19:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:19:21,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:19:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:19:21,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831185269] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:19:21,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:19:21,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-12 14:19:21,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417931347] [2022-12-12 14:19:21,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:19:21,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-12 14:19:21,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:19:21,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-12 14:19:21,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-12 14:19:21,695 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-12 14:19:21,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 37 transitions, 174 flow. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 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) [2022-12-12 14:19:21,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:19:21,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-12 14:19:21,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:19:22,396 INFO L130 PetriNetUnfolder]: 3217/4847 cut-off events. [2022-12-12 14:19:22,396 INFO L131 PetriNetUnfolder]: For 29968/29968 co-relation queries the response was YES. [2022-12-12 14:19:22,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14963 conditions, 4847 events. 3217/4847 cut-off events. For 29968/29968 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 20765 event pairs, 175 based on Foata normal form. 768/3203 useless extension candidates. Maximal degree in co-relation 14941. Up to 1345 conditions per place. [2022-12-12 14:19:22,422 INFO L137 encePairwiseOnDemand]: 25/28 looper letters, 374 selfloop transitions, 23 changer transitions 0/401 dead transitions. [2022-12-12 14:19:22,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 401 transitions, 1768 flow [2022-12-12 14:19:22,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-12 14:19:22,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-12 14:19:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 505 transitions. [2022-12-12 14:19:22,424 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7514880952380952 [2022-12-12 14:19:22,424 INFO L175 Difference]: Start difference. First operand has 55 places, 37 transitions, 174 flow. Second operand 24 states and 505 transitions. [2022-12-12 14:19:22,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 401 transitions, 1768 flow [2022-12-12 14:19:22,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 401 transitions, 1696 flow, removed 31 selfloop flow, removed 5 redundant places. [2022-12-12 14:19:22,444 INFO L231 Difference]: Finished difference. Result has 85 places, 49 transitions, 294 flow [2022-12-12 14:19:22,444 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=294, PETRI_PLACES=85, PETRI_TRANSITIONS=49} [2022-12-12 14:19:22,445 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 53 predicate places. [2022-12-12 14:19:22,445 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 49 transitions, 294 flow [2022-12-12 14:19:22,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 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) [2022-12-12 14:19:22,446 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:19:22,446 INFO L214 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-12-12 14:19:22,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 14:19:22,651 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 [2022-12-12 14:19:22,652 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:19:22,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:19:22,652 INFO L85 PathProgramCache]: Analyzing trace with hash -637174101, now seen corresponding path program 4 times [2022-12-12 14:19:22,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:19:22,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87229093] [2022-12-12 14:19:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:19:22,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:19:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:19:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:19:22,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:19:22,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87229093] [2022-12-12 14:19:22,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87229093] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:19:22,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753823965] [2022-12-12 14:19:22,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 14:19:22,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:19:22,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:19:22,993 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) [2022-12-12 14:19:22,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 14:19:23,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 14:19:23,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:19:23,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-12 14:19:23,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:19:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:19:23,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:19:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:19:23,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753823965] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:19:23,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:19:23,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2022-12-12 14:19:23,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699210012] [2022-12-12 14:19:23,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:19:23,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-12 14:19:23,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:19:23,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-12 14:19:23,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-12-12 14:19:23,348 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-12 14:19:23,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 49 transitions, 294 flow. Second operand has 27 states, 27 states have (on average 5.222222222222222) internal successors, (141), 27 states have internal predecessors, (141), 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) [2022-12-12 14:19:23,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:19:23,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-12 14:19:23,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:19:24,024 INFO L130 PetriNetUnfolder]: 3473/5231 cut-off events. [2022-12-12 14:19:24,024 INFO L131 PetriNetUnfolder]: For 39568/39568 co-relation queries the response was YES. [2022-12-12 14:19:24,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16895 conditions, 5231 events. 3473/5231 cut-off events. For 39568/39568 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 22427 event pairs, 175 based on Foata normal form. 128/2755 useless extension candidates. Maximal degree in co-relation 16861. Up to 1089 conditions per place. [2022-12-12 14:19:24,062 INFO L137 encePairwiseOnDemand]: 25/28 looper letters, 406 selfloop transitions, 25 changer transitions 0/435 dead transitions. [2022-12-12 14:19:24,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 435 transitions, 1940 flow [2022-12-12 14:19:24,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-12 14:19:24,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-12 14:19:24,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 537 transitions. [2022-12-12 14:19:24,064 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7376373626373627 [2022-12-12 14:19:24,064 INFO L175 Difference]: Start difference. First operand has 85 places, 49 transitions, 294 flow. Second operand 26 states and 537 transitions. [2022-12-12 14:19:24,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 435 transitions, 1940 flow [2022-12-12 14:19:24,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 435 transitions, 1840 flow, removed 39 selfloop flow, removed 11 redundant places. [2022-12-12 14:19:24,125 INFO L231 Difference]: Finished difference. Result has 101 places, 51 transitions, 270 flow [2022-12-12 14:19:24,126 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=270, PETRI_PLACES=101, PETRI_TRANSITIONS=51} [2022-12-12 14:19:24,128 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 69 predicate places. [2022-12-12 14:19:24,128 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 51 transitions, 270 flow [2022-12-12 14:19:24,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.222222222222222) internal successors, (141), 27 states have internal predecessors, (141), 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) [2022-12-12 14:19:24,128 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:19:24,128 INFO L214 CegarLoopForPetriNet]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2022-12-12 14:19:24,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 14:19:24,342 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 [2022-12-12 14:19:24,342 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:19:24,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:19:24,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1855981259, now seen corresponding path program 5 times [2022-12-12 14:19:24,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:19:24,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317536268] [2022-12-12 14:19:24,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:19:24,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:19:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:19:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:19:25,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:19:25,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317536268] [2022-12-12 14:19:25,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317536268] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:19:25,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959663918] [2022-12-12 14:19:25,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 14:19:25,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:19:25,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:19:25,380 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) [2022-12-12 14:19:25,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 14:19:25,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-12-12 14:19:25,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:19:25,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-12 14:19:25,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:19:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 253 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:19:26,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:19:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:19:27,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959663918] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:19:27,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:19:27,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2022-12-12 14:19:27,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069144426] [2022-12-12 14:19:27,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:19:27,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-12 14:19:27,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:19:27,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-12 14:19:27,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1048, Invalid=4804, Unknown=0, NotChecked=0, Total=5852 [2022-12-12 14:19:27,499 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-12 14:19:27,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 51 transitions, 270 flow. Second operand has 77 states, 77 states have (on average 5.1688311688311686) internal successors, (398), 77 states have internal predecessors, (398), 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) [2022-12-12 14:19:27,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:19:27,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-12 14:19:27,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand