/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_safe-10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 14:19:14,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 14:19:14,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 14:19:14,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 14:19:14,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 14:19:14,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 14:19:14,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 14:19:14,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 14:19:14,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 14:19:14,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 14:19:14,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 14:19:14,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 14:19:14,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 14:19:14,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 14:19:14,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 14:19:14,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 14:19:14,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 14:19:14,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 14:19:14,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 14:19:14,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 14:19:14,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 14:19:14,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 14:19:14,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 14:19:14,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 14:19:14,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 14:19:14,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 14:19:14,138 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 14:19:14,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 14:19:14,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 14:19:14,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 14:19:14,140 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 14:19:14,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 14:19:14,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 14:19:14,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 14:19:14,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 14:19:14,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 14:19:14,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 14:19:14,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 14:19:14,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 14:19:14,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 14:19:14,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 14:19:14,153 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 14:19:14,186 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 14:19:14,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 14:19:14,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 14:19:14,188 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 14:19:14,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 14:19:14,190 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 14:19:14,190 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 14:19:14,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 14:19:14,191 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 14:19:14,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 14:19:14,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 14:19:14,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 14:19:14,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 14:19:14,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 14:19:14,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 14:19:14,192 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 14:19:14,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 14:19:14,192 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 14:19:14,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 14:19:14,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 14:19:14,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 14:19:14,193 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 14:19:14,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 14:19:14,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 14:19:14,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 14:19:14,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 14:19:14,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 14:19:14,194 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 14:19:14,194 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 14:19:14,194 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 14:19:14,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-12 14:19:14,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 14:19:14,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 14:19:14,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 14:19:14,516 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 14:19:14,517 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 14:19:14,518 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-10.i [2022-12-12 14:19:15,518 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 14:19:15,768 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 14:19:15,768 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-10.i [2022-12-12 14:19:15,781 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6c9e4976/bf067d44c75c4d24bda32b3f0bd9abeb/FLAG11423874e [2022-12-12 14:19:15,798 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6c9e4976/bf067d44c75c4d24bda32b3f0bd9abeb [2022-12-12 14:19:15,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 14:19:15,805 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 14:19:15,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 14:19:15,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 14:19:15,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 14:19:15,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 02:19:15" (1/1) ... [2022-12-12 14:19:15,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e3f8aeb 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 14:19:15,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 02:19:15" (1/1) ... [2022-12-12 14:19:15,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 14:19:15,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 14:19:16,151 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_safe-10.i[30241,30254] [2022-12-12 14:19:16,161 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 14:19:16,162 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 14:19:16,165 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 14:19:16,166 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 14:19:16,170 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 14:19:16,171 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 14:19:16,171 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 14:19:16,172 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 14:19:16,177 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 14:19:16,179 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 14:19:16,181 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 14:19:16,190 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 14:19:16,230 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_safe-10.i[30241,30254] [2022-12-12 14:19:16,231 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 14:19:16,232 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 14:19:16,233 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 14:19:16,233 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 14:19:16,235 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 14:19:16,235 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 14:19:16,236 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 14:19:16,236 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 14:19:16,237 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 14:19:16,238 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 14:19:16,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 14:19:16,274 INFO L208 MainTranslator]: Completed translation [2022-12-12 14:19:16,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:19:16 WrapperNode [2022-12-12 14:19:16,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 14:19:16,275 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 14:19:16,276 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 14:19:16,276 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 14:19:16,282 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 14:19:16,305 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 14:19:16,334 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-12 14:19:16,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 14:19:16,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 14:19:16,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 14:19:16,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 14:19:16,343 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 14:19:16,343 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 14:19:16,349 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 14:19:16,349 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 14:19:16,366 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 14:19:16,369 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 14:19:16,370 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 14:19:16,371 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 14:19:16,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 14:19:16,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 14:19:16,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 14:19:16,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 14:19:16,380 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 14:19:16,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 14:19:16,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:19:16,413 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 14:19:16,436 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 14:19:16,458 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-12 14:19:16,458 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-12 14:19:16,459 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-12 14:19:16,459 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-12 14:19:16,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 14:19:16,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 14:19:16,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 14:19:16,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 14:19:16,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 14:19:16,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 14:19:16,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 14:19:16,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 14:19:16,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 14:19:16,461 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 14:19:16,570 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 14:19:16,572 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 14:19:16,746 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 14:19:16,752 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 14:19:16,753 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-12 14:19:16,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 02:19:16 BoogieIcfgContainer [2022-12-12 14:19:16,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 14:19:16,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 14:19:16,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 14:19:16,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 14:19:16,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 02:19:15" (1/3) ... [2022-12-12 14:19:16,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a2e6e6d 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 14:19:16,778 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 14:19:16,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a2e6e6d 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 14:19:16,778 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 14:19:16,779 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-10.i [2022-12-12 14:19:16,806 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 14:19:16,806 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 14:19:16,807 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 14:19:16,917 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-12 14:19:16,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 93 transitions, 196 flow [2022-12-12 14:19:17,029 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-12 14:19:17,030 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-12 14:19:17,036 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 14:19:17,037 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 93 transitions, 196 flow [2022-12-12 14:19:17,043 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 91 transitions, 188 flow [2022-12-12 14:19:17,045 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 14:19:17,075 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 91 transitions, 188 flow [2022-12-12 14:19:17,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 91 transitions, 188 flow [2022-12-12 14:19:17,120 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-12 14:19:17,121 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-12 14:19:17,123 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 14:19:17,126 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 91 transitions, 188 flow [2022-12-12 14:19:17,126 INFO L226 LiptonReduction]: Number of co-enabled transitions 1914 [2022-12-12 14:19:20,510 INFO L241 LiptonReduction]: Total number of compositions: 79 [2022-12-12 14:19:20,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 14:19:20,529 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;@34f4973, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 14:19:20,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 14:19:20,534 INFO L130 PetriNetUnfolder]: 3/26 cut-off events. [2022-12-12 14:19:20,534 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-12 14:19:20,535 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:19:20,536 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-12 14:19:20,536 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 14:19:20,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:19:20,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1807783243, now seen corresponding path program 1 times [2022-12-12 14:19:20,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:19:20,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408616700] [2022-12-12 14:19:20,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:19:20,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:19:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:19:20,781 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 14:19:20,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:19:20,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408616700] [2022-12-12 14:19:20,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408616700] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:19:20,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 14:19:20,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 14:19:20,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609052429] [2022-12-12 14:19:20,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:19:20,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 14:19:20,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:19:20,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 14:19:20,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 14:19:20,816 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-12 14:19:20,818 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 14:19:20,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:19:20,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-12 14:19:20,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:19:21,031 INFO L130 PetriNetUnfolder]: 657/1007 cut-off events. [2022-12-12 14:19:21,032 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-12 14:19:21,035 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 14:19:21,042 INFO L137 encePairwiseOnDemand]: 24/28 looper letters, 38 selfloop transitions, 2 changer transitions 1/45 dead transitions. [2022-12-12 14:19:21,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 45 transitions, 178 flow [2022-12-12 14:19:21,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 14:19:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 14:19:21,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2022-12-12 14:19:21,055 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2022-12-12 14:19:21,056 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 62 flow. Second operand 3 states and 55 transitions. [2022-12-12 14:19:21,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 45 transitions, 178 flow [2022-12-12 14:19:21,059 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 14:19:21,061 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 70 flow [2022-12-12 14:19:21,063 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 14:19:21,067 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2022-12-12 14:19:21,067 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 70 flow [2022-12-12 14:19:21,068 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 14:19:21,068 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:19:21,068 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:19:21,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 14:19:21,069 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 14:19:21,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:19:21,077 INFO L85 PathProgramCache]: Analyzing trace with hash 206704716, now seen corresponding path program 1 times [2022-12-12 14:19:21,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:19:21,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949685214] [2022-12-12 14:19:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:19:21,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:19:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:19:21,192 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 14:19:21,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:19:21,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949685214] [2022-12-12 14:19:21,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949685214] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:19:21,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621167433] [2022-12-12 14:19:21,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:19:21,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:19:21,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:19:21,196 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 14:19:21,263 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 14:19:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:19:21,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-12 14:19:21,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:19:21,396 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 14:19:21,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:19:21,417 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 14:19:21,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621167433] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:19:21,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:19:21,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-12 14:19:21,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109006721] [2022-12-12 14:19:21,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:19:21,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 14:19:21,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:19:21,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 14:19:21,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-12 14:19:21,420 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-12 14:19:21,420 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 14:19:21,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:19:21,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-12 14:19:21,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:19:21,626 INFO L130 PetriNetUnfolder]: 913/1391 cut-off events. [2022-12-12 14:19:21,626 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-12 14:19:21,628 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 14:19:21,635 INFO L137 encePairwiseOnDemand]: 25/28 looper letters, 86 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2022-12-12 14:19:21,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 95 transitions, 392 flow [2022-12-12 14:19:21,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 14:19:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 14:19:21,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2022-12-12 14:19:21,637 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7023809523809523 [2022-12-12 14:19:21,637 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 70 flow. Second operand 6 states and 118 transitions. [2022-12-12 14:19:21,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 95 transitions, 392 flow [2022-12-12 14:19:21,638 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 14:19:21,639 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 104 flow [2022-12-12 14:19:21,639 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 14:19:21,640 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2022-12-12 14:19:21,640 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 104 flow [2022-12-12 14:19:21,641 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 14:19:21,641 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:19:21,641 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-12 14:19:21,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 14:19:21,847 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 14:19:21,847 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 14:19:21,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:19:21,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1043870325, now seen corresponding path program 2 times [2022-12-12 14:19:21,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:19:21,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050131233] [2022-12-12 14:19:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:19:21,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:19:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:19:21,969 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 14:19:21,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:19:21,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050131233] [2022-12-12 14:19:21,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050131233] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:19:21,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509402607] [2022-12-12 14:19:21,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 14:19:21,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:19:21,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:19:21,972 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 14:19:21,975 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 14:19:22,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 14:19:22,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:19:22,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 14:19:22,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:19:22,084 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 14:19:22,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:19:22,143 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 14:19:22,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509402607] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:19:22,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:19:22,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-12 14:19:22,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621819804] [2022-12-12 14:19:22,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:19:22,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 14:19:22,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:19:22,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 14:19:22,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-12 14:19:22,148 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-12 14:19:22,149 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 14:19:22,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:19:22,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-12 14:19:22,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:19:22,524 INFO L130 PetriNetUnfolder]: 1681/2543 cut-off events. [2022-12-12 14:19:22,525 INFO L131 PetriNetUnfolder]: For 1552/1552 co-relation queries the response was YES. [2022-12-12 14:19:22,530 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 14:19:22,543 INFO L137 encePairwiseOnDemand]: 25/28 looper letters, 182 selfloop transitions, 11 changer transitions 0/197 dead transitions. [2022-12-12 14:19:22,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 197 transitions, 846 flow [2022-12-12 14:19:22,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 14:19:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 14:19:22,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2022-12-12 14:19:22,548 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7351190476190477 [2022-12-12 14:19:22,548 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 104 flow. Second operand 12 states and 247 transitions. [2022-12-12 14:19:22,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 197 transitions, 846 flow [2022-12-12 14:19:22,558 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 14:19:22,561 INFO L231 Difference]: Finished difference. Result has 55 places, 37 transitions, 174 flow [2022-12-12 14:19:22,562 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 14:19:22,563 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 23 predicate places. [2022-12-12 14:19:22,563 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 37 transitions, 174 flow [2022-12-12 14:19:22,564 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 14:19:22,564 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:19:22,564 INFO L214 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-12 14:19:22,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 14:19:22,771 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 14:19:22,771 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 14:19:22,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:19:22,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2052466155, now seen corresponding path program 3 times [2022-12-12 14:19:22,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:19:22,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020962539] [2022-12-12 14:19:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:19:22,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:19:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:19:22,978 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 14:19:22,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:19:22,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020962539] [2022-12-12 14:19:22,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020962539] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:19:22,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991615289] [2022-12-12 14:19:22,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 14:19:22,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:19:22,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:19:22,987 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 14:19:22,990 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 14:19:23,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-12 14:19:23,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:19:23,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 14:19:23,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:19:23,117 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 14:19:23,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:19:23,297 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 14:19:23,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991615289] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:19:23,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:19:23,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-12 14:19:23,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870977701] [2022-12-12 14:19:23,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:19:23,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-12 14:19:23,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:19:23,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-12 14:19:23,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-12 14:19:23,304 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-12 14:19:23,305 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 14:19:23,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:19:23,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-12 14:19:23,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:19:24,173 INFO L130 PetriNetUnfolder]: 3217/4847 cut-off events. [2022-12-12 14:19:24,173 INFO L131 PetriNetUnfolder]: For 29968/29968 co-relation queries the response was YES. [2022-12-12 14:19:24,185 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 14:19:24,208 INFO L137 encePairwiseOnDemand]: 25/28 looper letters, 374 selfloop transitions, 23 changer transitions 0/401 dead transitions. [2022-12-12 14:19:24,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 401 transitions, 1768 flow [2022-12-12 14:19:24,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-12 14:19:24,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-12 14:19:24,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 505 transitions. [2022-12-12 14:19:24,211 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7514880952380952 [2022-12-12 14:19:24,211 INFO L175 Difference]: Start difference. First operand has 55 places, 37 transitions, 174 flow. Second operand 24 states and 505 transitions. [2022-12-12 14:19:24,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 401 transitions, 1768 flow [2022-12-12 14:19:24,234 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 14:19:24,237 INFO L231 Difference]: Finished difference. Result has 85 places, 49 transitions, 294 flow [2022-12-12 14:19:24,237 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 14:19:24,238 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 53 predicate places. [2022-12-12 14:19:24,238 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 49 transitions, 294 flow [2022-12-12 14:19:24,238 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 14:19:24,238 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:19:24,238 INFO L214 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-12-12 14:19:24,250 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 14:19:24,444 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 14:19:24,444 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 14:19:24,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:19:24,445 INFO L85 PathProgramCache]: Analyzing trace with hash -637174101, now seen corresponding path program 4 times [2022-12-12 14:19:24,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:19:24,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337969500] [2022-12-12 14:19:24,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:19:24,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:19:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:19:25,817 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 14:19:25,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:19:25,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337969500] [2022-12-12 14:19:25,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337969500] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:19:25,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297439566] [2022-12-12 14:19:25,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 14:19:25,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:19:25,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:19:25,820 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 14:19:25,829 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 14:19:25,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 14:19:25,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:19:25,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 74 conjunts are in the unsatisfiable core [2022-12-12 14:19:25,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:19:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 210 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:19:26,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:19:28,275 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 14:19:28,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297439566] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:19:28,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:19:28,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2022-12-12 14:19:28,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486939957] [2022-12-12 14:19:28,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:19:28,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-12 14:19:28,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:19:28,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-12 14:19:28,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=904, Invalid=4066, Unknown=0, NotChecked=0, Total=4970 [2022-12-12 14:19:28,280 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-12 14:19:28,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 49 transitions, 294 flow. Second operand has 71 states, 71 states have (on average 5.183098591549296) internal successors, (368), 71 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:19:28,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:19:28,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-12 14:19:28,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand