/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --traceabstraction.cegar.restart.behaviour ONE_CEGAR_PER_ERROR_LOCATION -s ../../../trunk/examples/settings/gemcutter/SleepMap-ConcreteSmt-VarAbsGlobalSmt.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.error.function.in.sv-comp.mode false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.dpor-95ec559 [2023-01-11 15:12:01,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-11 15:12:01,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-11 15:12:01,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-11 15:12:01,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-11 15:12:01,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-11 15:12:01,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-11 15:12:01,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-11 15:12:01,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-11 15:12:01,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-11 15:12:01,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-11 15:12:01,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-11 15:12:01,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-11 15:12:01,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-11 15:12:01,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-11 15:12:01,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-11 15:12:01,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-11 15:12:01,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-11 15:12:01,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-11 15:12:01,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-11 15:12:01,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-11 15:12:01,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-11 15:12:01,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-11 15:12:01,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-11 15:12:01,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-11 15:12:01,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-11 15:12:01,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-11 15:12:01,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-11 15:12:01,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-11 15:12:01,620 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-11 15:12:01,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-11 15:12:01,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-11 15:12:01,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-11 15:12:01,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-11 15:12:01,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-11 15:12:01,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-11 15:12:01,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-11 15:12:01,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-11 15:12:01,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-11 15:12:01,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-11 15:12:01,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-11 15:12:01,625 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/gemcutter/SleepMap-ConcreteSmt-VarAbsGlobalSmt.epf [2023-01-11 15:12:01,649 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-11 15:12:01,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-11 15:12:01,649 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-01-11 15:12:01,650 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-01-11 15:12:01,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-11 15:12:01,651 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-11 15:12:01,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-11 15:12:01,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-11 15:12:01,651 INFO L138 SettingsManager]: * Use SBE=true [2023-01-11 15:12:01,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-11 15:12:01,652 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-11 15:12:01,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-11 15:12:01,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-11 15:12:01,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-11 15:12:01,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-11 15:12:01,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-11 15:12:01,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-11 15:12:01,652 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-11 15:12:01,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-11 15:12:01,653 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-11 15:12:01,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-11 15:12:01,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-11 15:12:01,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-11 15:12:01,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-11 15:12:01,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-11 15:12:01,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-11 15:12:01,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-11 15:12:01,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-11 15:12:01,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-11 15:12:01,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-11 15:12:01,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-11 15:12:01,654 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-01-11 15:12:01,654 INFO L138 SettingsManager]: * Abstraction used for commutativity in POR=VARIABLES_GLOBAL [2023-01-11 15:12:01,654 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2023-01-11 15:12:01,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-01-11 15:12:01,654 INFO L138 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_ERROR_LOCATION [2023-01-11 15:12:01,655 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_NEW_STATES [2023-01-11 15:12:01,655 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-11 15:12:01,655 INFO L138 SettingsManager]: * Number of independence relations to use for POR=2 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: CEGAR restart behaviour -> ONE_CEGAR_PER_ERROR_LOCATION Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of error function in SV-COMP mode -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-01-11 15:12:01,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-11 15:12:01,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-11 15:12:01,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-11 15:12:01,853 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-11 15:12:01,853 INFO L275 PluginConnector]: CDTParser initialized [2023-01-11 15:12:01,854 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-01-11 15:12:02,911 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-11 15:12:03,139 INFO L351 CDTParser]: Found 1 translation units. [2023-01-11 15:12:03,139 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-01-11 15:12:03,146 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/844ab2f2e/96d1571b3da642378790c3f8fb081703/FLAG401974fba [2023-01-11 15:12:03,157 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/844ab2f2e/96d1571b3da642378790c3f8fb081703 [2023-01-11 15:12:03,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-11 15:12:03,160 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-11 15:12:03,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-11 15:12:03,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-11 15:12:03,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-11 15:12:03,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 03:12:03" (1/1) ... [2023-01-11 15:12:03,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1563307c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:12:03, skipping insertion in model container [2023-01-11 15:12:03,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 03:12:03" (1/1) ... [2023-01-11 15:12:03,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-11 15:12:03,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-11 15:12:03,376 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2023-01-11 15:12:03,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-11 15:12:03,407 INFO L203 MainTranslator]: Completed pre-run [2023-01-11 15:12:03,443 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2023-01-11 15:12:03,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-11 15:12:03,490 INFO L208 MainTranslator]: Completed translation [2023-01-11 15:12:03,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:12:03 WrapperNode [2023-01-11 15:12:03,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-11 15:12:03,492 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-11 15:12:03,492 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-11 15:12:03,492 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-11 15:12:03,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:12:03" (1/1) ... [2023-01-11 15:12:03,520 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:12:03" (1/1) ... [2023-01-11 15:12:03,539 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-01-11 15:12:03,539 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-11 15:12:03,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-11 15:12:03,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-11 15:12:03,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-11 15:12:03,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:12:03" (1/1) ... [2023-01-11 15:12:03,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:12:03" (1/1) ... [2023-01-11 15:12:03,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:12:03" (1/1) ... [2023-01-11 15:12:03,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:12:03" (1/1) ... [2023-01-11 15:12:03,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:12:03" (1/1) ... [2023-01-11 15:12:03,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:12:03" (1/1) ... [2023-01-11 15:12:03,566 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:12:03" (1/1) ... [2023-01-11 15:12:03,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:12:03" (1/1) ... [2023-01-11 15:12:03,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-11 15:12:03,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-11 15:12:03,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-11 15:12:03,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-11 15:12:03,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:12:03" (1/1) ... [2023-01-11 15:12:03,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-11 15:12:03,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:12:03,603 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-11 15:12:03,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-11 15:12:03,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-11 15:12:03,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-11 15:12:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-11 15:12:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-11 15:12:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-11 15:12:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-11 15:12:03,653 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-11 15:12:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-11 15:12:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-11 15:12:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-11 15:12:03,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-11 15:12:03,654 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-11 15:12:03,746 INFO L236 CfgBuilder]: Building ICFG [2023-01-11 15:12:03,747 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-11 15:12:03,947 INFO L277 CfgBuilder]: Performing block encoding [2023-01-11 15:12:03,952 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-11 15:12:03,952 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-01-11 15:12:03,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 03:12:03 BoogieIcfgContainer [2023-01-11 15:12:03,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-11 15:12:03,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-11 15:12:03,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-11 15:12:03,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-11 15:12:03,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 03:12:03" (1/3) ... [2023-01-11 15:12:03,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@182e13fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 03:12:03, skipping insertion in model container [2023-01-11 15:12:03,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:12:03" (2/3) ... [2023-01-11 15:12:03,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@182e13fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 03:12:03, skipping insertion in model container [2023-01-11 15:12:03,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 03:12:03" (3/3) ... [2023-01-11 15:12:03,958 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2023-01-11 15:12:03,963 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-01-11 15:12:03,969 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-11 15:12:03,969 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-01-11 15:12:03,969 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-11 15:12:04,045 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-11 15:12:04,074 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:04,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-01-11 15:12:04,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:12:04,078 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-01-11 15:12:04,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2023-01-11 15:12:04,114 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:04,120 INFO L164 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2023-01-11 15:12:04,120 WARN L167 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2023-01-11 15:12:04,120 WARN L168 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2023-01-11 15:12:04,124 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2023-01-11 15:12:04,128 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, 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;@79dc9c94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:04,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-11 15:12:04,322 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2023-01-11 15:12:04,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-01-11 15:12:04,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1919662344, now seen corresponding path program 1 times [2023-01-11 15:12:04,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-11 15:12:04,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365811585] [2023-01-11 15:12:04,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:04,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-11 15:12:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:04,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-11 15:12:04,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365811585] [2023-01-11 15:12:04,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365811585] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-11 15:12:04,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-11 15:12:04,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-11 15:12:04,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130102200] [2023-01-11 15:12:04,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-11 15:12:04,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-11 15:12:04,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-11 15:12:04,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-11 15:12:04,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-11 15:12:04,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:04,562 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-01-11 15:12:04,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-11 15:12:04,562 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:04,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-11 15:12:04,719 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2023-01-11 15:12:04,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-11 15:12:04,725 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-11 15:12:04,726 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (1/21) [2023-01-11 15:12:04,730 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:04,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-01-11 15:12:04,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:12:04,763 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-01-11 15:12:04,769 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:04,770 INFO L164 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2023-01-11 15:12:04,770 WARN L167 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2023-01-11 15:12:04,770 WARN L168 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2023-01-11 15:12:04,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2023-01-11 15:12:04,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (3)] Waiting until timeout for monitored process [2023-01-11 15:12:04,771 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, 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;@79dc9c94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:04,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-11 15:12:04,846 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2023-01-11 15:12:04,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-01-11 15:12:04,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1919662343, now seen corresponding path program 1 times [2023-01-11 15:12:04,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-11 15:12:04,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103472090] [2023-01-11 15:12:04,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:04,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-11 15:12:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:05,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-11 15:12:05,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103472090] [2023-01-11 15:12:05,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103472090] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-11 15:12:05,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835534173] [2023-01-11 15:12:05,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:05,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-11 15:12:05,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:12:05,107 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-11 15:12:05,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-11 15:12:05,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:05,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-11 15:12:05,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-11 15:12:05,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-11 15:12:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:05,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-11 15:12:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:05,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835534173] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-11 15:12:05,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-11 15:12:05,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-01-11 15:12:05,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031611091] [2023-01-11 15:12:05,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-11 15:12:05,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-11 15:12:05,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-11 15:12:05,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-11 15:12:05,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-01-11 15:12:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:05,417 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-01-11 15:12:05,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.846153846153846) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-11 15:12:05,418 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-11 15:12:05,635 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2023-01-11 15:12:05,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-11 15:12:05,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-11 15:12:05,844 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-11 15:12:05,844 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (2/21) [2023-01-11 15:12:05,846 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:05,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-01-11 15:12:05,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:12:05,847 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-01-11 15:12:05,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (5)] Waiting until timeout for monitored process [2023-01-11 15:12:05,857 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:05,859 INFO L164 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2023-01-11 15:12:05,859 WARN L167 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2023-01-11 15:12:05,859 WARN L168 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2023-01-11 15:12:05,859 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2023-01-11 15:12:05,860 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, 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;@79dc9c94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:05,860 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-11 15:12:05,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2023-01-11 15:12:05,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-01-11 15:12:05,969 INFO L85 PathProgramCache]: Analyzing trace with hash -509333182, now seen corresponding path program 1 times [2023-01-11 15:12:05,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-11 15:12:05,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715734762] [2023-01-11 15:12:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:05,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-11 15:12:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-11 15:12:05,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-11 15:12:05,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715734762] [2023-01-11 15:12:05,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715734762] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-11 15:12:05,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-11 15:12:05,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-11 15:12:05,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386446844] [2023-01-11 15:12:05,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-11 15:12:05,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-11 15:12:05,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-11 15:12:05,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-11 15:12:05,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-11 15:12:05,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:05,996 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-01-11 15:12:05,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 29.5) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-11 15:12:05,996 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:06,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:06,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-11 15:12:06,014 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2023-01-11 15:12:06,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-01-11 15:12:06,015 INFO L85 PathProgramCache]: Analyzing trace with hash 618607535, now seen corresponding path program 1 times [2023-01-11 15:12:06,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-11 15:12:06,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682988761] [2023-01-11 15:12:06,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:06,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-11 15:12:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:06,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-11 15:12:06,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682988761] [2023-01-11 15:12:06,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682988761] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-11 15:12:06,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529801325] [2023-01-11 15:12:06,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:06,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-11 15:12:06,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:12:06,061 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-11 15:12:06,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-11 15:12:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:06,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-11 15:12:06,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-11 15:12:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:06,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-11 15:12:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:06,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529801325] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-11 15:12:06,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-11 15:12:06,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-11 15:12:06,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616842796] [2023-01-11 15:12:06,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-11 15:12:06,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-11 15:12:06,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-11 15:12:06,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-11 15:12:06,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-01-11 15:12:06,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:06,183 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-01-11 15:12:06,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-11 15:12:06,183 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:06,184 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:06,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:06,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-11 15:12:06,232 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2023-01-11 15:12:06,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-11 15:12:06,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-11 15:12:06,439 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-11 15:12:06,440 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (3/21) [2023-01-11 15:12:06,444 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:06,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-01-11 15:12:06,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:12:06,445 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-01-11 15:12:06,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (7)] Waiting until timeout for monitored process [2023-01-11 15:12:06,449 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:06,449 INFO L164 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2023-01-11 15:12:06,449 WARN L167 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2023-01-11 15:12:06,449 WARN L168 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2023-01-11 15:12:06,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2023-01-11 15:12:06,450 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, 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;@79dc9c94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:06,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-11 15:12:06,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2023-01-11 15:12:06,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-01-11 15:12:06,579 INFO L85 PathProgramCache]: Analyzing trace with hash -509333181, now seen corresponding path program 1 times [2023-01-11 15:12:06,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-11 15:12:06,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237897536] [2023-01-11 15:12:06,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:06,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-11 15:12:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-11 15:12:06,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-11 15:12:06,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237897536] [2023-01-11 15:12:06,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237897536] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-11 15:12:06,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-11 15:12:06,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-11 15:12:06,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85589051] [2023-01-11 15:12:06,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-11 15:12:06,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-11 15:12:06,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-11 15:12:06,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-11 15:12:06,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-11 15:12:06,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:06,601 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-01-11 15:12:06,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 29.5) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-11 15:12:06,601 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:06,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:06,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-11 15:12:06,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2023-01-11 15:12:06,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-01-11 15:12:06,620 INFO L85 PathProgramCache]: Analyzing trace with hash 618607536, now seen corresponding path program 1 times [2023-01-11 15:12:06,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-11 15:12:06,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998739471] [2023-01-11 15:12:06,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:06,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-11 15:12:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:06,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-11 15:12:06,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998739471] [2023-01-11 15:12:06,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998739471] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-11 15:12:06,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607717405] [2023-01-11 15:12:06,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:06,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-11 15:12:06,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:12:06,679 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-11 15:12:06,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-11 15:12:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:06,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-11 15:12:06,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-11 15:12:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:06,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-11 15:12:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:06,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607717405] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-11 15:12:06,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-11 15:12:06,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-11 15:12:06,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331032298] [2023-01-11 15:12:06,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-11 15:12:06,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-11 15:12:06,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-11 15:12:06,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-11 15:12:06,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-01-11 15:12:06,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:06,782 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-01-11 15:12:06,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-11 15:12:06,782 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:06,782 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:06,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:06,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-11 15:12:06,830 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2023-01-11 15:12:06,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-11 15:12:07,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-11 15:12:07,041 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-11 15:12:07,042 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (4/21) [2023-01-11 15:12:07,044 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:07,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-01-11 15:12:07,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:12:07,046 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-01-11 15:12:07,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (9)] Waiting until timeout for monitored process [2023-01-11 15:12:07,082 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:07,083 INFO L164 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2023-01-11 15:12:07,083 WARN L167 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2023-01-11 15:12:07,083 WARN L168 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2023-01-11 15:12:07,083 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES ======== [2023-01-11 15:12:07,083 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, 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;@79dc9c94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:07,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-11 15:12:07,117 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-11 15:12:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-01-11 15:12:07,117 INFO L85 PathProgramCache]: Analyzing trace with hash 620009748, now seen corresponding path program 1 times [2023-01-11 15:12:07,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-11 15:12:07,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454828806] [2023-01-11 15:12:07,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:07,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-11 15:12:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-11 15:12:07,136 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-11 15:12:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-11 15:12:07,159 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-11 15:12:07,159 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-11 15:12:07,159 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-11 15:12:07,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-11 15:12:07,160 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-11 15:12:07,160 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES was UNSAFE (5/21) [2023-01-11 15:12:07,161 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-11 15:12:07,161 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-11 15:12:07,183 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-11 15:12:07,188 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:07,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-01-11 15:12:07,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:12:07,197 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-01-11 15:12:07,217 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:07,218 INFO L164 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2023-01-11 15:12:07,218 WARN L167 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2023-01-11 15:12:07,218 WARN L168 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2023-01-11 15:12:07,218 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2023-01-11 15:12:07,218 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, 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;@79dc9c94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:07,218 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-11 15:12:07,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (10)] Waiting until timeout for monitored process [2023-01-11 15:12:07,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2023-01-11 15:12:07,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-01-11 15:12:07,379 INFO L85 PathProgramCache]: Analyzing trace with hash 334828878, now seen corresponding path program 1 times [2023-01-11 15:12:07,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-11 15:12:07,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430236572] [2023-01-11 15:12:07,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:07,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-11 15:12:07,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-11 15:12:07,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-11 15:12:07,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430236572] [2023-01-11 15:12:07,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430236572] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-11 15:12:07,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-11 15:12:07,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-11 15:12:07,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407749213] [2023-01-11 15:12:07,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-11 15:12:07,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-11 15:12:07,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-11 15:12:07,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-11 15:12:07,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-11 15:12:07,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:07,411 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-01-11 15:12:07,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 23.0) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-11 15:12:07,412 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:08,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-11 15:12:08,367 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2023-01-11 15:12:08,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-11 15:12:08,370 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-11 15:12:08,370 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (1/29) [2023-01-11 15:12:08,373 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:08,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-01-11 15:12:08,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:12:08,376 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-01-11 15:12:08,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (11)] Waiting until timeout for monitored process [2023-01-11 15:12:08,379 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:08,380 INFO L164 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2023-01-11 15:12:08,380 WARN L167 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2023-01-11 15:12:08,380 WARN L168 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2023-01-11 15:12:08,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2023-01-11 15:12:08,380 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, 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;@79dc9c94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:08,380 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-11 15:12:08,537 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2023-01-11 15:12:08,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-01-11 15:12:08,539 INFO L85 PathProgramCache]: Analyzing trace with hash 334828879, now seen corresponding path program 1 times [2023-01-11 15:12:08,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-11 15:12:08,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749234947] [2023-01-11 15:12:08,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:08,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-11 15:12:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:08,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-11 15:12:08,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749234947] [2023-01-11 15:12:08,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749234947] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-11 15:12:08,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233498969] [2023-01-11 15:12:08,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:08,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-11 15:12:08,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:12:08,731 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-11 15:12:08,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-11 15:12:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:08,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-11 15:12:08,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-11 15:12:08,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-11 15:12:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:08,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-11 15:12:09,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:09,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233498969] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-11 15:12:09,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-11 15:12:09,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-01-11 15:12:09,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755816861] [2023-01-11 15:12:09,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-11 15:12:09,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-11 15:12:09,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-11 15:12:09,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-11 15:12:09,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2023-01-11 15:12:09,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:09,069 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-01-11 15:12:09,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.578947368421052) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-11 15:12:09,070 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-11 15:12:10,114 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2023-01-11 15:12:10,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-11 15:12:10,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-11 15:12:10,324 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-11 15:12:10,324 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (2/29) [2023-01-11 15:12:10,326 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:10,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-01-11 15:12:10,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:12:10,327 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-01-11 15:12:10,336 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:10,337 INFO L164 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2023-01-11 15:12:10,337 WARN L167 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2023-01-11 15:12:10,337 WARN L168 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2023-01-11 15:12:10,337 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2023-01-11 15:12:10,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (13)] Waiting until timeout for monitored process [2023-01-11 15:12:10,337 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, 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;@79dc9c94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:10,338 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-11 15:12:12,647 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2023-01-11 15:12:12,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-01-11 15:12:12,648 INFO L85 PathProgramCache]: Analyzing trace with hash -739083309, now seen corresponding path program 1 times [2023-01-11 15:12:12,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-11 15:12:12,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890429523] [2023-01-11 15:12:12,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:12,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-11 15:12:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-11 15:12:12,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-11 15:12:12,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890429523] [2023-01-11 15:12:12,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890429523] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-11 15:12:12,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-11 15:12:12,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-11 15:12:12,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773671477] [2023-01-11 15:12:12,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-11 15:12:12,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-11 15:12:12,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-11 15:12:12,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-11 15:12:12,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-11 15:12:12,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:12,667 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-01-11 15:12:12,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-11 15:12:12,667 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:13,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:13,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-11 15:12:13,114 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2023-01-11 15:12:13,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-01-11 15:12:13,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1788359136, now seen corresponding path program 1 times [2023-01-11 15:12:13,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-11 15:12:13,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716086359] [2023-01-11 15:12:13,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:13,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-11 15:12:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:13,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-11 15:12:13,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716086359] [2023-01-11 15:12:13,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716086359] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-11 15:12:13,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699314726] [2023-01-11 15:12:13,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:13,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-11 15:12:13,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:12:13,185 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-11 15:12:13,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-11 15:12:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:13,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-11 15:12:13,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-11 15:12:13,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:13,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-11 15:12:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:13,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699314726] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-11 15:12:13,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-11 15:12:13,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-01-11 15:12:13,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074266143] [2023-01-11 15:12:13,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-11 15:12:13,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-11 15:12:13,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-11 15:12:13,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-11 15:12:13,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-01-11 15:12:13,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:13,343 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-01-11 15:12:13,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-11 15:12:13,343 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:13,343 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:13,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-11 15:12:13,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2023-01-11 15:12:13,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-01-11 15:12:14,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-11 15:12:14,148 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-11 15:12:14,149 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (3/29) [2023-01-11 15:12:14,150 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:14,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-01-11 15:12:14,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:12:14,151 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-01-11 15:12:14,175 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:14,176 INFO L164 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2023-01-11 15:12:14,176 WARN L167 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2023-01-11 15:12:14,176 WARN L168 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2023-01-11 15:12:14,176 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2023-01-11 15:12:14,176 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, 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;@79dc9c94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:14,176 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-11 15:12:14,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (15)] Waiting until timeout for monitored process [2023-01-11 15:12:16,551 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2023-01-11 15:12:16,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-01-11 15:12:16,551 INFO L85 PathProgramCache]: Analyzing trace with hash -739083308, now seen corresponding path program 1 times [2023-01-11 15:12:16,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-11 15:12:16,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029068014] [2023-01-11 15:12:16,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:16,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-11 15:12:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-11 15:12:16,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-11 15:12:16,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029068014] [2023-01-11 15:12:16,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029068014] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-11 15:12:16,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-11 15:12:16,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-11 15:12:16,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027811764] [2023-01-11 15:12:16,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-11 15:12:16,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-11 15:12:16,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-11 15:12:16,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-11 15:12:16,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-11 15:12:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:16,570 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-01-11 15:12:16,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-11 15:12:16,570 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:16,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-11 15:12:16,908 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2023-01-11 15:12:16,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-01-11 15:12:16,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1788359137, now seen corresponding path program 1 times [2023-01-11 15:12:16,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-11 15:12:16,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357218407] [2023-01-11 15:12:16,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:16,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-11 15:12:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:16,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-11 15:12:16,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357218407] [2023-01-11 15:12:16,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357218407] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-11 15:12:16,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791989586] [2023-01-11 15:12:16,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:16,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-11 15:12:16,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:12:16,981 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-11 15:12:17,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-11 15:12:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:17,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-11 15:12:17,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-11 15:12:17,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:17,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-11 15:12:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:17,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791989586] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-11 15:12:17,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-11 15:12:17,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-01-11 15:12:17,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966589927] [2023-01-11 15:12:17,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-11 15:12:17,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-11 15:12:17,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-11 15:12:17,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-11 15:12:17,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-01-11 15:12:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:17,114 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-01-11 15:12:17,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-11 15:12:17,114 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:17,114 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:17,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-11 15:12:17,581 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2023-01-11 15:12:17,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-01-11 15:12:17,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-11 15:12:17,786 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-11 15:12:17,787 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (4/29) [2023-01-11 15:12:17,788 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:17,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-01-11 15:12:17,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:12:17,791 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-01-11 15:12:17,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (17)] Waiting until timeout for monitored process [2023-01-11 15:12:17,794 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:17,794 INFO L164 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2023-01-11 15:12:17,794 WARN L167 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2023-01-11 15:12:17,794 WARN L168 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2023-01-11 15:12:17,794 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES ======== [2023-01-11 15:12:17,795 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, 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;@79dc9c94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:17,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-11 15:12:17,828 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-11 15:12:17,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-01-11 15:12:17,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1789761389, now seen corresponding path program 1 times [2023-01-11 15:12:17,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-11 15:12:17,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161333119] [2023-01-11 15:12:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:17,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-11 15:12:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-11 15:12:17,839 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-11 15:12:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-11 15:12:17,857 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-11 15:12:17,857 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-11 15:12:17,857 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-11 15:12:17,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-11 15:12:17,859 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-11 15:12:17,860 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES was UNSAFE (5/29) [2023-01-11 15:12:17,860 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-11 15:12:17,860 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-11 15:12:17,880 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-11 15:12:17,881 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:17,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-01-11 15:12:17,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:12:17,884 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-01-11 15:12:17,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (18)] Waiting until timeout for monitored process [2023-01-11 15:12:17,887 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:17,888 INFO L164 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2023-01-11 15:12:17,888 WARN L167 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2023-01-11 15:12:17,888 WARN L168 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2023-01-11 15:12:17,888 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2023-01-11 15:12:17,888 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, 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;@79dc9c94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:17,888 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-11 15:12:20,403 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2023-01-11 15:12:20,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-01-11 15:12:20,403 INFO L85 PathProgramCache]: Analyzing trace with hash -43631693, now seen corresponding path program 1 times [2023-01-11 15:12:20,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-11 15:12:20,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700856255] [2023-01-11 15:12:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:20,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-11 15:12:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-11 15:12:20,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-11 15:12:20,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700856255] [2023-01-11 15:12:20,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700856255] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-11 15:12:20,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-11 15:12:20,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-11 15:12:20,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652249082] [2023-01-11 15:12:20,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-11 15:12:20,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-11 15:12:20,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-11 15:12:20,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-11 15:12:20,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-11 15:12:20,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:20,439 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-01-11 15:12:20,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 23.5) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-11 15:12:20,439 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:50,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-11 15:12:50,505 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2023-01-11 15:12:50,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-01-11 15:12:50,506 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-11 15:12:50,506 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (1/37) [2023-01-11 15:12:50,507 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:50,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-01-11 15:12:50,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:12:50,515 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-01-11 15:12:50,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (19)] Waiting until timeout for monitored process [2023-01-11 15:12:50,519 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:50,521 INFO L164 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2023-01-11 15:12:50,521 WARN L167 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2023-01-11 15:12:50,521 WARN L168 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2023-01-11 15:12:50,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2023-01-11 15:12:50,521 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, 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;@79dc9c94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:12:50,521 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-11 15:12:52,668 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2023-01-11 15:12:52,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-01-11 15:12:52,669 INFO L85 PathProgramCache]: Analyzing trace with hash -43631692, now seen corresponding path program 1 times [2023-01-11 15:12:52,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-11 15:12:52,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546094950] [2023-01-11 15:12:52,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:52,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-11 15:12:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:52,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-11 15:12:52,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546094950] [2023-01-11 15:12:52,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546094950] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-11 15:12:52,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922025562] [2023-01-11 15:12:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:12:52,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-11 15:12:52,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:12:52,859 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-11 15:12:52,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-11 15:12:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:12:52,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-11 15:12:52,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-11 15:12:52,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-11 15:12:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:53,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-11 15:12:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:12:53,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922025562] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-11 15:12:53,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-11 15:12:53,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-01-11 15:12:53,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299315932] [2023-01-11 15:12:53,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-11 15:12:53,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-11 15:12:53,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-11 15:12:53,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-11 15:12:53,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2023-01-11 15:12:53,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:12:53,358 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-01-11 15:12:53,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 5.230769230769231) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-11 15:12:53,359 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:13:21,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-11 15:13:21,432 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2023-01-11 15:13:21,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-01-11 15:13:21,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-11 15:13:21,644 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-11 15:13:21,644 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (2/37) [2023-01-11 15:13:21,646 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:13:21,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-01-11 15:13:21,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:13:21,653 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-01-11 15:13:21,658 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:13:21,658 INFO L164 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2023-01-11 15:13:21,658 WARN L167 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2023-01-11 15:13:21,658 WARN L168 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2023-01-11 15:13:21,658 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2023-01-11 15:13:21,659 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, 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;@79dc9c94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-01-11 15:13:21,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-11 15:13:21,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (21)] Waiting until timeout for monitored process [2023-01-11 15:17:42,225 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2023-01-11 15:17:42,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-01-11 15:17:42,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1158949560, now seen corresponding path program 1 times [2023-01-11 15:17:42,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-11 15:17:42,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515502993] [2023-01-11 15:17:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:17:42,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-11 15:17:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:17:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-01-11 15:17:42,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-11 15:17:42,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515502993] [2023-01-11 15:17:42,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515502993] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-11 15:17:42,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-11 15:17:42,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-11 15:17:42,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030190691] [2023-01-11 15:17:42,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-11 15:17:42,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-11 15:17:42,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-11 15:17:42,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-11 15:17:42,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-11 15:17:42,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:17:42,261 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-01-11 15:17:42,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-11 15:17:42,261 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:18:06,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:18:06,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-01-11 15:18:06,146 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2023-01-11 15:18:06,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-01-11 15:18:06,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1353983291, now seen corresponding path program 1 times [2023-01-11 15:18:06,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-11 15:18:06,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930889689] [2023-01-11 15:18:06,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:18:06,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-11 15:18:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:18:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:18:06,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-11 15:18:06,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930889689] [2023-01-11 15:18:06,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930889689] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-11 15:18:06,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735069172] [2023-01-11 15:18:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-11 15:18:06,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-11 15:18:06,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-11 15:18:06,303 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-11 15:18:06,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-11 15:18:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-11 15:18:06,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-11 15:18:06,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-11 15:18:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:18:06,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-11 15:18:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-11 15:18:06,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735069172] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-11 15:18:06,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-11 15:18:06,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-01-11 15:18:06,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160448409] [2023-01-11 15:18:06,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-11 15:18:06,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-11 15:18:06,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-11 15:18:06,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-11 15:18:06,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-01-11 15:18:06,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:18:06,543 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-01-11 15:18:06,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.944444444444445) internal successors, (107), 18 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-11 15:18:06,544 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-01-11 15:18:06,544 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states.