/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-NoLbe.epf --traceabstraction.use.on-demand.petri.net.difference true --traceabstraction.size.reduction.to.apply.after.petri.net.difference REMOVE_REDUNDANT_FLOW -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_safe-6.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 11:25:16,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 11:25:16,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 11:25:16,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 11:25:16,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 11:25:16,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 11:25:16,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 11:25:16,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 11:25:16,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 11:25:16,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 11:25:16,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 11:25:16,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 11:25:16,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 11:25:16,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 11:25:16,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 11:25:16,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 11:25:16,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 11:25:16,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 11:25:16,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 11:25:16,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 11:25:16,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 11:25:16,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 11:25:16,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 11:25:16,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 11:25:16,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 11:25:16,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 11:25:16,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 11:25:16,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 11:25:16,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 11:25:16,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 11:25:16,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 11:25:16,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 11:25:16,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 11:25:16,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 11:25:16,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 11:25:16,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 11:25:16,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 11:25:16,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 11:25:16,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 11:25:16,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 11:25:16,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 11:25:16,586 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-NoLbe.epf [2022-12-12 11:25:16,612 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 11:25:16,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 11:25:16,613 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 11:25:16,613 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 11:25:16,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 11:25:16,615 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 11:25:16,615 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 11:25:16,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 11:25:16,615 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 11:25:16,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 11:25:16,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 11:25:16,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 11:25:16,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 11:25:16,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 11:25:16,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 11:25:16,617 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 11:25:16,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 11:25:16,617 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 11:25:16,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 11:25:16,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 11:25:16,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 11:25:16,617 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 11:25:16,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 11:25:16,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 11:25:16,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 11:25:16,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 11:25:16,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 11:25:16,618 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-12 11:25:16,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 11:25:16,618 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 11:25:16,619 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 11:25:16,619 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_REDUNDANT_FLOW [2022-12-12 11:25:16,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 11:25:16,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 11:25:16,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 11:25:16,944 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 11:25:16,945 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 11:25:16,946 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-6.i [2022-12-12 11:25:18,007 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 11:25:18,249 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 11:25:18,249 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-6.i [2022-12-12 11:25:18,259 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2148a047c/0f00bc5b601e434daeb41092eeee4a4d/FLAGdc98f5c3f [2022-12-12 11:25:18,274 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2148a047c/0f00bc5b601e434daeb41092eeee4a4d [2022-12-12 11:25:18,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 11:25:18,277 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 11:25:18,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 11:25:18,281 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 11:25:18,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 11:25:18,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180ea16d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18, skipping insertion in model container [2022-12-12 11:25:18,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 11:25:18,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 11:25:18,596 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-6.i[30241,30254] [2022-12-12 11:25:18,605 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 11:25:18,606 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 11:25:18,611 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 11:25:18,612 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 11:25:18,616 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 11:25:18,616 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 11:25:18,616 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 11:25:18,617 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 11:25:18,621 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 11:25:18,622 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 11:25:18,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 11:25:18,632 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 11:25:18,668 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-6.i[30241,30254] [2022-12-12 11:25:18,669 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 11:25:18,670 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 11:25:18,670 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 11:25:18,671 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 11:25:18,673 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 11:25:18,674 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 11:25:18,674 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 11:25:18,674 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 11:25:18,675 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 11:25:18,676 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 11:25:18,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 11:25:18,711 INFO L208 MainTranslator]: Completed translation [2022-12-12 11:25:18,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18 WrapperNode [2022-12-12 11:25:18,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 11:25:18,713 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 11:25:18,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 11:25:18,715 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 11:25:18,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,761 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-12 11:25:18,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 11:25:18,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 11:25:18,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 11:25:18,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 11:25:18,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,792 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 11:25:18,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 11:25:18,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 11:25:18,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 11:25:18,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (1/1) ... [2022-12-12 11:25:18,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 11:25:18,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 11:25:18,819 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 11:25:18,825 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 11:25:18,847 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-12 11:25:18,847 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-12 11:25:18,847 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-12 11:25:18,847 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-12 11:25:18,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 11:25:18,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 11:25:18,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 11:25:18,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 11:25:18,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 11:25:18,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 11:25:18,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 11:25:18,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 11:25:18,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 11:25:18,849 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 11:25:19,028 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 11:25:19,045 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 11:25:19,189 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 11:25:19,195 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 11:25:19,195 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-12 11:25:19,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:25:19 BoogieIcfgContainer [2022-12-12 11:25:19,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 11:25:19,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 11:25:19,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 11:25:19,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 11:25:19,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 11:25:18" (1/3) ... [2022-12-12 11:25:19,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f36690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:25:19, skipping insertion in model container [2022-12-12 11:25:19,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:18" (2/3) ... [2022-12-12 11:25:19,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f36690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:25:19, skipping insertion in model container [2022-12-12 11:25:19,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:25:19" (3/3) ... [2022-12-12 11:25:19,205 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-6.i [2022-12-12 11:25:19,218 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 11:25:19,218 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 11:25:19,218 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 11:25:19,266 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-12 11:25:19,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 93 transitions, 196 flow [2022-12-12 11:25:19,346 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-12 11:25:19,346 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-12 11:25:19,355 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 11:25:19,355 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 93 transitions, 196 flow [2022-12-12 11:25:19,360 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 91 transitions, 188 flow [2022-12-12 11:25:19,369 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 11:25:19,375 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;@31be51f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 11:25:19,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 11:25:19,396 INFO L130 PetriNetUnfolder]: 6/81 cut-off events. [2022-12-12 11:25:19,396 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-12 11:25:19,396 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 11:25:19,397 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 11:25:19,397 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 11:25:19,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 11:25:19,402 INFO L85 PathProgramCache]: Analyzing trace with hash 95801150, now seen corresponding path program 1 times [2022-12-12 11:25:19,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 11:25:19,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972476458] [2022-12-12 11:25:19,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 11:25:19,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 11:25:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 11:25:19,766 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 11:25:19,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 11:25:19,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972476458] [2022-12-12 11:25:19,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972476458] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 11:25:19,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 11:25:19,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 11:25:19,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681789929] [2022-12-12 11:25:19,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 11:25:19,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 11:25:19,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 11:25:19,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 11:25:19,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 11:25:19,799 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 93 [2022-12-12 11:25:19,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 91 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 11:25:19,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 11:25:19,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 93 [2022-12-12 11:25:19,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 11:25:19,847 INFO L130 PetriNetUnfolder]: 3/92 cut-off events. [2022-12-12 11:25:19,848 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 11:25:19,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 92 events. 3/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 18/106 useless extension candidates. Maximal degree in co-relation 75. Up to 6 conditions per place. [2022-12-12 11:25:19,850 INFO L137 encePairwiseOnDemand]: 86/93 looper letters, 9 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2022-12-12 11:25:19,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 89 transitions, 206 flow [2022-12-12 11:25:19,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 11:25:19,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 11:25:19,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2022-12-12 11:25:19,867 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.9283154121863799 [2022-12-12 11:25:19,873 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 1 predicate places. [2022-12-12 11:25:19,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 89 transitions, 206 flow [2022-12-12 11:25:19,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 89 transitions, 198 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-12 11:25:19,881 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 198 flow [2022-12-12 11:25:19,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 11:25:19,882 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 11:25:19,882 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 11:25:19,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 11:25:19,884 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 11:25:19,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 11:25:19,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1875915451, now seen corresponding path program 1 times [2022-12-12 11:25:19,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 11:25:19,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262182524] [2022-12-12 11:25:19,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 11:25:19,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 11:25:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 11:25:20,126 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 11:25:20,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 11:25:20,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262182524] [2022-12-12 11:25:20,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262182524] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 11:25:20,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272667048] [2022-12-12 11:25:20,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 11:25:20,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 11:25:20,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 11:25:20,138 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 11:25:20,164 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 11:25:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 11:25:20,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 11:25:20,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 11:25:20,340 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 11:25:20,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 11:25:20,399 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 11:25:20,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272667048] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 11:25:20,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 11:25:20,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-12 11:25:20,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286354871] [2022-12-12 11:25:20,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 11:25:20,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 11:25:20,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 11:25:20,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 11:25:20,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-12 11:25:20,404 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 93 [2022-12-12 11:25:20,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 198 flow. Second operand has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 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 11:25:20,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 11:25:20,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 93 [2022-12-12 11:25:20,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 11:25:20,514 INFO L130 PetriNetUnfolder]: 3/101 cut-off events. [2022-12-12 11:25:20,514 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-12 11:25:20,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 101 events. 3/101 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 103. Up to 10 conditions per place. [2022-12-12 11:25:20,520 INFO L137 encePairwiseOnDemand]: 87/93 looper letters, 10 selfloop transitions, 9 changer transitions 0/95 dead transitions. [2022-12-12 11:25:20,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 95 transitions, 256 flow [2022-12-12 11:25:20,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 11:25:20,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 11:25:20,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 723 transitions. [2022-12-12 11:25:20,525 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8637992831541219 [2022-12-12 11:25:20,525 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 7 predicate places. [2022-12-12 11:25:20,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 95 transitions, 256 flow [2022-12-12 11:25:20,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 95 transitions, 224 flow, removed 14 selfloop flow, removed 2 redundant places. [2022-12-12 11:25:20,530 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 95 transitions, 224 flow [2022-12-12 11:25:20,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 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 11:25:20,531 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 11:25:20,531 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 11:25:20,541 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 11:25:20,737 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 11:25:20,737 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 11:25:20,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 11:25:20,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1869128357, now seen corresponding path program 2 times [2022-12-12 11:25:20,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 11:25:20,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754326501] [2022-12-12 11:25:20,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 11:25:20,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 11:25:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 11:25:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:20,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 11:25:20,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754326501] [2022-12-12 11:25:20,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754326501] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 11:25:20,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039410985] [2022-12-12 11:25:20,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 11:25:20,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 11:25:20,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 11:25:20,968 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 11:25:21,001 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 11:25:21,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 11:25:21,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 11:25:21,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 11:25:21,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 11:25:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:21,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 11:25:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:21,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039410985] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 11:25:21,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 11:25:21,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-12 11:25:21,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833059154] [2022-12-12 11:25:21,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 11:25:21,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 11:25:21,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 11:25:21,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 11:25:21,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-12-12 11:25:21,251 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 93 [2022-12-12 11:25:21,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 95 transitions, 224 flow. Second operand has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 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 11:25:21,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 11:25:21,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 93 [2022-12-12 11:25:21,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 11:25:21,437 INFO L130 PetriNetUnfolder]: 3/129 cut-off events. [2022-12-12 11:25:21,437 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-12-12 11:25:21,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 129 events. 3/129 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 166. Up to 12 conditions per place. [2022-12-12 11:25:21,439 INFO L137 encePairwiseOnDemand]: 87/93 looper letters, 14 selfloop transitions, 21 changer transitions 0/111 dead transitions. [2022-12-12 11:25:21,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 111 transitions, 358 flow [2022-12-12 11:25:21,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 11:25:21,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 11:25:21,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1677 transitions. [2022-12-12 11:25:21,444 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.858678955453149 [2022-12-12 11:25:21,445 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 25 predicate places. [2022-12-12 11:25:21,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 111 transitions, 358 flow [2022-12-12 11:25:21,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 111 transitions, 318 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-12-12 11:25:21,450 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 111 transitions, 318 flow [2022-12-12 11:25:21,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 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 11:25:21,451 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 11:25:21,452 INFO L214 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 11:25:21,466 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 11:25:21,659 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 11:25:21,660 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 11:25:21,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 11:25:21,660 INFO L85 PathProgramCache]: Analyzing trace with hash 526543515, now seen corresponding path program 3 times [2022-12-12 11:25:21,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 11:25:21,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240062343] [2022-12-12 11:25:21,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 11:25:21,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 11:25:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 11:25:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:22,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 11:25:22,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240062343] [2022-12-12 11:25:22,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240062343] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 11:25:22,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573130689] [2022-12-12 11:25:22,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 11:25:22,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 11:25:22,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 11:25:22,012 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 11:25:22,014 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 11:25:22,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-12 11:25:22,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 11:25:22,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-12 11:25:22,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 11:25:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:22,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 11:25:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:22,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573130689] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 11:25:22,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 11:25:22,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 31 [2022-12-12 11:25:22,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687496123] [2022-12-12 11:25:22,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 11:25:22,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-12 11:25:22,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 11:25:22,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-12 11:25:22,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2022-12-12 11:25:22,459 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 93 [2022-12-12 11:25:22,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 111 transitions, 318 flow. Second operand has 31 states, 31 states have (on average 80.06451612903226) internal successors, (2482), 31 states have internal predecessors, (2482), 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 11:25:22,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 11:25:22,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 93 [2022-12-12 11:25:22,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 11:25:22,919 INFO L130 PetriNetUnfolder]: 3/178 cut-off events. [2022-12-12 11:25:22,920 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-12-12 11:25:22,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 178 events. 3/178 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 7/182 useless extension candidates. Maximal degree in co-relation 307. Up to 24 conditions per place. [2022-12-12 11:25:22,922 INFO L137 encePairwiseOnDemand]: 87/93 looper letters, 21 selfloop transitions, 42 changer transitions 0/139 dead transitions. [2022-12-12 11:25:22,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 139 transitions, 598 flow [2022-12-12 11:25:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-12 11:25:22,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-12-12 11:25:22,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3346 transitions. [2022-12-12 11:25:22,930 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8566308243727598 [2022-12-12 11:25:22,931 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 60 predicate places. [2022-12-12 11:25:22,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 139 transitions, 598 flow [2022-12-12 11:25:22,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 139 transitions, 520 flow, removed 21 selfloop flow, removed 18 redundant places. [2022-12-12 11:25:22,934 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 139 transitions, 520 flow [2022-12-12 11:25:22,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 80.06451612903226) internal successors, (2482), 31 states have internal predecessors, (2482), 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 11:25:22,936 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 11:25:22,936 INFO L214 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 11:25:22,945 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 11:25:23,143 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 11:25:23,143 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 11:25:23,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 11:25:23,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1164740830, now seen corresponding path program 4 times [2022-12-12 11:25:23,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 11:25:23,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386294689] [2022-12-12 11:25:23,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 11:25:23,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 11:25:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 11:25:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:25,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 11:25:25,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386294689] [2022-12-12 11:25:25,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386294689] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 11:25:25,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605792123] [2022-12-12 11:25:25,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 11:25:25,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 11:25:25,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 11:25:25,769 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 11:25:25,779 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 11:25:25,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 11:25:25,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 11:25:25,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-12 11:25:25,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 11:25:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 486 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:29,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 11:25:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:25:33,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605792123] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 11:25:33,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 11:25:33,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 145 [2022-12-12 11:25:33,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049188976] [2022-12-12 11:25:33,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 11:25:33,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-12-12 11:25:33,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 11:25:33,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-12-12 11:25:33,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1256, Invalid=19624, Unknown=0, NotChecked=0, Total=20880 [2022-12-12 11:25:33,584 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 93 [2022-12-12 11:25:33,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 139 transitions, 520 flow. Second operand has 145 states, 145 states have (on average 62.241379310344826) internal successors, (9025), 145 states have internal predecessors, (9025), 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 11:25:33,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 11:25:33,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 93 [2022-12-12 11:25:33,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 11:29:06,285 INFO L130 PetriNetUnfolder]: 36232/139965 cut-off events. [2022-12-12 11:29:06,285 INFO L131 PetriNetUnfolder]: For 3879/3879 co-relation queries the response was YES. [2022-12-12 11:29:06,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206253 conditions, 139965 events. 36232/139965 cut-off events. For 3879/3879 co-relation queries the response was YES. Maximal size of possible extension queue 2071. Compared 2077793 event pairs, 0 based on Foata normal form. 0/128356 useless extension candidates. Maximal degree in co-relation 206208. Up to 18299 conditions per place. [2022-12-12 11:29:07,053 INFO L137 encePairwiseOnDemand]: 76/93 looper letters, 1461 selfloop transitions, 2230 changer transitions 1200/4996 dead transitions. [2022-12-12 11:29:07,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1157 places, 4996 transitions, 20016 flow [2022-12-12 11:29:07,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1025 states. [2022-12-12 11:29:07,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1025 states. [2022-12-12 11:29:07,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 67513 transitions. [2022-12-12 11:29:07,136 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7082402307894047 [2022-12-12 11:29:07,138 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 1066 predicate places. [2022-12-12 11:29:07,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1157 places, 4996 transitions, 20016 flow [2022-12-12 11:29:07,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1156 places, 4996 transitions, 20004 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-12 11:29:07,248 INFO L495 AbstractCegarLoop]: Abstraction has has 1156 places, 4996 transitions, 20004 flow [2022-12-12 11:29:07,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 62.241379310344826) internal successors, (9025), 145 states have internal predecessors, (9025), 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 11:29:07,251 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 11:29:07,251 INFO L214 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 11:29:07,258 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 11:29:07,457 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 11:29:07,458 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 11:29:07,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 11:29:07,458 INFO L85 PathProgramCache]: Analyzing trace with hash 2070965142, now seen corresponding path program 1 times [2022-12-12 11:29:07,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 11:29:07,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473866626] [2022-12-12 11:29:07,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 11:29:07,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 11:29:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 11:29:09,777 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:29:09,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 11:29:09,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473866626] [2022-12-12 11:29:09,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473866626] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 11:29:09,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447626731] [2022-12-12 11:29:09,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 11:29:09,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 11:29:09,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 11:29:09,780 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 11:29:09,782 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 11:29:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 11:29:09,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-12 11:29:09,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 11:29:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 486 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:29:13,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 11:29:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 11:29:17,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447626731] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 11:29:17,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 11:29:17,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 153 [2022-12-12 11:29:17,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457294332] [2022-12-12 11:29:17,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 11:29:17,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-12-12 11:29:17,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 11:29:17,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-12-12 11:29:17,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=21981, Unknown=0, NotChecked=0, Total=23256 [2022-12-12 11:29:17,668 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 93 [2022-12-12 11:29:17,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1156 places, 4996 transitions, 20004 flow. Second operand has 153 states, 153 states have (on average 62.23529411764706) internal successors, (9522), 153 states have internal predecessors, (9522), 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 11:29:17,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 11:29:17,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 93 [2022-12-12 11:29:17,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand