/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy BADGER --traceabstraction.cegar.restart.behaviour ONE_CEGAR_PER_ERROR_LOCATION --traceabstraction.dfs.order.used.in.por LOOP_LOCKSTEP -s ../../../trunk/examples/settings/gemcutter/SleepMap-ConcreteSmt-VarAbsGlobalSyntactic.epf --traceabstraction.coinflip.probability.value 15 --traceabstraction.coinflip.random.seed 13 --traceabstraction.coinflip.budget.determination.mode PURE -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/weaver/bench-exp3x3-opt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.por-optimizations-e57bdd3-m [2022-10-06 06:06:31,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-06 06:06:31,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-06 06:06:31,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-06 06:06:31,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-06 06:06:31,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-06 06:06:31,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-06 06:06:31,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-06 06:06:31,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-06 06:06:31,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-06 06:06:31,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-06 06:06:31,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-06 06:06:31,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-06 06:06:31,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-06 06:06:31,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-06 06:06:31,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-06 06:06:31,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-06 06:06:31,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-06 06:06:31,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-06 06:06:31,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-06 06:06:31,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-06 06:06:31,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-06 06:06:31,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-06 06:06:31,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-06 06:06:31,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-06 06:06:31,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-06 06:06:31,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-06 06:06:31,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-06 06:06:31,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-06 06:06:31,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-06 06:06:31,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-06 06:06:31,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-06 06:06:31,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-06 06:06:31,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-06 06:06:31,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-06 06:06:31,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-06 06:06:31,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-06 06:06:31,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-06 06:06:31,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-06 06:06:31,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-06 06:06:31,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-06 06:06:31,684 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/gemcutter/SleepMap-ConcreteSmt-VarAbsGlobalSyntactic.epf [2022-10-06 06:06:31,717 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-06 06:06:31,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-06 06:06:31,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-06 06:06:31,718 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-06 06:06:31,719 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-06 06:06:31,719 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-06 06:06:31,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-06 06:06:31,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-06 06:06:31,722 INFO L138 SettingsManager]: * Use SBE=true [2022-10-06 06:06:31,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-06 06:06:31,723 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-06 06:06:31,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-06 06:06:31,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-06 06:06:31,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-06 06:06:31,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-06 06:06:31,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-06 06:06:31,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-06 06:06:31,724 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-06 06:06:31,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-06 06:06:31,724 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-06 06:06:31,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-06 06:06:31,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-06 06:06:31,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-06 06:06:31,725 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-10-06 06:06:31,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-06 06:06:31,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-06 06:06:31,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-06 06:06:31,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-06 06:06:31,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-06 06:06:31,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-06 06:06:31,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-06 06:06:31,726 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-06 06:06:31,726 INFO L138 SettingsManager]: * Abstraction used for commutativity in POR=VARIABLES_GLOBAL [2022-10-06 06:06:31,727 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2022-10-06 06:06:31,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-06 06:06:31,727 INFO L138 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_ERROR_LOCATION [2022-10-06 06:06:31,727 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_NEW_STATES [2022-10-06 06:06:31,727 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-10-06 06:06:31,727 INFO L138 SettingsManager]: * Number of independence relations to use for POR=2 [2022-10-06 06:06:31,728 INFO L138 SettingsManager]: * Independence relation used for POR in concurrent analysis=SYNTACTIC 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: Trace refinement strategy -> BADGER 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.traceabstraction: DFS Order used in POR -> LOOP_LOCKSTEP Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Coinflip probability value -> 15 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Coinflip random seed -> 13 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Coinflip budget determination mode -> PURE 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 [2022-10-06 06:06:32,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-06 06:06:32,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-06 06:06:32,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-06 06:06:32,096 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-06 06:06:32,097 INFO L275 PluginConnector]: CDTParser initialized [2022-10-06 06:06:32,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp3x3-opt.wvr.c [2022-10-06 06:06:32,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26ddef3b2/2b18c2eee9df4549b05f31459fd4cf4f/FLAGbe94bcbae [2022-10-06 06:06:32,716 INFO L306 CDTParser]: Found 1 translation units. [2022-10-06 06:06:32,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp3x3-opt.wvr.c [2022-10-06 06:06:32,724 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26ddef3b2/2b18c2eee9df4549b05f31459fd4cf4f/FLAGbe94bcbae [2022-10-06 06:06:33,182 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26ddef3b2/2b18c2eee9df4549b05f31459fd4cf4f [2022-10-06 06:06:33,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-06 06:06:33,187 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-06 06:06:33,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-06 06:06:33,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-06 06:06:33,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-06 06:06:33,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.10 06:06:33" (1/1) ... [2022-10-06 06:06:33,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419719bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 06:06:33, skipping insertion in model container [2022-10-06 06:06:33,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.10 06:06:33" (1/1) ... [2022-10-06 06:06:33,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-06 06:06:33,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-06 06:06:33,390 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp3x3-opt.wvr.c[2826,2839] [2022-10-06 06:06:33,392 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-06 06:06:33,399 INFO L203 MainTranslator]: Completed pre-run [2022-10-06 06:06:33,430 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp3x3-opt.wvr.c[2826,2839] [2022-10-06 06:06:33,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-06 06:06:33,449 INFO L208 MainTranslator]: Completed translation [2022-10-06 06:06:33,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 06:06:33 WrapperNode [2022-10-06 06:06:33,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-06 06:06:33,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-06 06:06:33,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-06 06:06:33,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-06 06:06:33,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 06:06:33" (1/1) ... [2022-10-06 06:06:33,465 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 06:06:33" (1/1) ... [2022-10-06 06:06:33,490 INFO L138 Inliner]: procedures = 25, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2022-10-06 06:06:33,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-06 06:06:33,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-06 06:06:33,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-06 06:06:33,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-06 06:06:33,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 06:06:33" (1/1) ... [2022-10-06 06:06:33,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 06:06:33" (1/1) ... [2022-10-06 06:06:33,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 06:06:33" (1/1) ... [2022-10-06 06:06:33,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 06:06:33" (1/1) ... [2022-10-06 06:06:33,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 06:06:33" (1/1) ... [2022-10-06 06:06:33,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 06:06:33" (1/1) ... [2022-10-06 06:06:33,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 06:06:33" (1/1) ... [2022-10-06 06:06:33,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-06 06:06:33,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-06 06:06:33,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-06 06:06:33,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-06 06:06:33,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 06:06:33" (1/1) ... [2022-10-06 06:06:33,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-06 06:06:33,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:06:33,551 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-06 06:06:33,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-06 06:06:33,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-06 06:06:33,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-06 06:06:33,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-06 06:06:33,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-06 06:06:33,616 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-10-06 06:06:33,616 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-10-06 06:06:33,616 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-10-06 06:06:33,616 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-10-06 06:06:33,616 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-10-06 06:06:33,616 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-10-06 06:06:33,616 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-10-06 06:06:33,616 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-10-06 06:06:33,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-06 06:06:33,617 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-10-06 06:06:33,617 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-10-06 06:06:33,617 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-10-06 06:06:33,617 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-10-06 06:06:33,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-06 06:06:33,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-06 06:06:33,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-06 06:06:33,619 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-06 06:06:33,713 INFO L234 CfgBuilder]: Building ICFG [2022-10-06 06:06:33,716 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-06 06:06:34,152 INFO L275 CfgBuilder]: Performing block encoding [2022-10-06 06:06:34,160 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-06 06:06:34,160 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-10-06 06:06:34,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.10 06:06:34 BoogieIcfgContainer [2022-10-06 06:06:34,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-06 06:06:34,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-06 06:06:34,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-06 06:06:34,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-06 06:06:34,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.10 06:06:33" (1/3) ... [2022-10-06 06:06:34,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45b25b92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.10 06:06:34, skipping insertion in model container [2022-10-06 06:06:34,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 06:06:33" (2/3) ... [2022-10-06 06:06:34,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45b25b92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.10 06:06:34, skipping insertion in model container [2022-10-06 06:06:34,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.10 06:06:34" (3/3) ... [2022-10-06 06:06:34,184 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp3x3-opt.wvr.c [2022-10-06 06:06:34,193 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-06 06:06:34,202 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-06 06:06:34,202 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2022-10-06 06:06:34,202 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-06 06:06:34,343 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-10-06 06:06:34,413 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:06:34,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:06:34,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:06:34,444 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) [2022-10-06 06:06:34,497 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 [2022-10-06 06:06:34,506 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:34,533 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:06:34,533 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:06:34,533 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:06:34,544 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:06:34,552 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:34,553 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:06:34,616 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:34,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:34,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1176320486, now seen corresponding path program 1 times [2022-10-06 06:06:34,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:34,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630411125] [2022-10-06 06:06:34,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:34,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:34,861 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:34,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630411125] [2022-10-06 06:06:34,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630411125] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:34,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:34,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:34,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623537533] [2022-10-06 06:06:34,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:34,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:06:34,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:34,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:06:34,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:06:34,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:34,897 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:34,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:34,898 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:34,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:34,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-06 06:06:34,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:34,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:34,919 INFO L85 PathProgramCache]: Analyzing trace with hash 870575920, now seen corresponding path program 1 times [2022-10-06 06:06:34,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:34,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113814969] [2022-10-06 06:06:34,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:34,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:34,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:35,093 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:35,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113814969] [2022-10-06 06:06:35,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113814969] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:35,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:35,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:35,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564683903] [2022-10-06 06:06:35,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:35,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-06 06:06:35,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:35,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-06 06:06:35,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-06 06:06:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:35,097 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:35,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:35,097 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:35,097 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:35,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:35,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:06:35,130 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:06:35,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-06 06:06:35,135 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:06:35,136 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (1/30) [2022-10-06 06:06:35,151 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:06:35,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:06:35,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:06:35,162 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) [2022-10-06 06:06:35,170 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 [2022-10-06 06:06:35,173 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:35,174 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:06:35,174 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:06:35,174 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:06:35,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:06:35,176 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:35,176 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:06:35,202 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:35,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:35,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1176320487, now seen corresponding path program 1 times [2022-10-06 06:06:35,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:35,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287419310] [2022-10-06 06:06:35,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:35,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:35,243 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:35,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287419310] [2022-10-06 06:06:35,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287419310] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:35,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:35,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:35,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851734716] [2022-10-06 06:06:35,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:35,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:06:35,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:35,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:06:35,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:06:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:35,246 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:35,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:35,246 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:35,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:35,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-06 06:06:35,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:35,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:35,254 INFO L85 PathProgramCache]: Analyzing trace with hash 870575921, now seen corresponding path program 1 times [2022-10-06 06:06:35,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:35,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573787992] [2022-10-06 06:06:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:35,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:35,464 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:35,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573787992] [2022-10-06 06:06:35,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573787992] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:35,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:35,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-06 06:06:35,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700419161] [2022-10-06 06:06:35,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:35,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-06 06:06:35,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:35,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-06 06:06:35,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-06 06:06:35,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:35,469 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:35,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:35,469 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:35,469 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:35,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:35,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:06:35,537 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:06:35,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-06 06:06:35,539 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:06:35,540 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (2/30) [2022-10-06 06:06:35,543 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:06:35,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:06:35,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:06:35,550 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-10-06 06:06:35,557 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:35,559 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:06:35,559 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:06:35,559 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:06:35,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:06:35,560 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:35,560 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:06:35,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (4)] Waiting until timeout for monitored process [2022-10-06 06:06:35,653 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:35,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:35,654 INFO L85 PathProgramCache]: Analyzing trace with hash 156609578, now seen corresponding path program 1 times [2022-10-06 06:06:35,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:35,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581756337] [2022-10-06 06:06:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:35,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:35,713 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:35,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581756337] [2022-10-06 06:06:35,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581756337] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:35,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:35,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:35,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015453227] [2022-10-06 06:06:35,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:35,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:06:35,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:35,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:06:35,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:06:35,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:35,715 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:35,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:35,716 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:35,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:35,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-06 06:06:35,724 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:35,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:35,724 INFO L85 PathProgramCache]: Analyzing trace with hash 744912639, now seen corresponding path program 1 times [2022-10-06 06:06:35,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:35,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349252909] [2022-10-06 06:06:35,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:35,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:35,869 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:35,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349252909] [2022-10-06 06:06:35,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349252909] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:35,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:35,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:35,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634877598] [2022-10-06 06:06:35,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:35,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-06 06:06:35,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:35,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-06 06:06:35,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-06 06:06:35,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:35,876 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:35,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 28.5) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:35,876 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:35,876 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:35,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:35,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:06:35,933 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:06:35,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-06 06:06:35,937 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:06:35,940 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (3/30) [2022-10-06 06:06:35,943 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:06:35,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:06:35,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:06:35,971 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) [2022-10-06 06:06:35,976 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 [2022-10-06 06:06:35,977 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:35,978 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:06:35,978 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:06:35,978 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:06:35,978 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:06:35,979 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:35,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:06:36,015 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:36,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:36,017 INFO L85 PathProgramCache]: Analyzing trace with hash 156609579, now seen corresponding path program 1 times [2022-10-06 06:06:36,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:36,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359973115] [2022-10-06 06:06:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:36,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:36,061 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:36,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359973115] [2022-10-06 06:06:36,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359973115] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:36,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:36,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:36,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777709997] [2022-10-06 06:06:36,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:36,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:06:36,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:36,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:06:36,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:06:36,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,063 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:36,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:36,063 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-06 06:06:36,076 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:36,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:36,076 INFO L85 PathProgramCache]: Analyzing trace with hash 744912640, now seen corresponding path program 1 times [2022-10-06 06:06:36,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:36,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563859382] [2022-10-06 06:06:36,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:36,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:36,234 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:36,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563859382] [2022-10-06 06:06:36,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563859382] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:36,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:36,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-06 06:06:36,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376102053] [2022-10-06 06:06:36,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:36,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-06 06:06:36,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:36,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-06 06:06:36,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-06 06:06:36,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,248 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:36,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 19.0) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:36,248 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,248 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:06:36,295 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:06:36,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-06 06:06:36,296 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:06:36,297 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (4/30) [2022-10-06 06:06:36,300 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:06:36,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:06:36,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:06:36,302 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-10-06 06:06:36,335 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:36,336 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:06:36,336 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:06:36,336 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:06:36,336 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:06:36,337 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:36,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:06:36,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (6)] Waiting until timeout for monitored process [2022-10-06 06:06:36,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:36,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:36,390 INFO L85 PathProgramCache]: Analyzing trace with hash 952416125, now seen corresponding path program 1 times [2022-10-06 06:06:36,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:36,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986776068] [2022-10-06 06:06:36,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:36,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:36,416 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:36,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986776068] [2022-10-06 06:06:36,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986776068] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:36,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:36,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:36,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230590664] [2022-10-06 06:06:36,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:36,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:06:36,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:36,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:06:36,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:06:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,421 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:36,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 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) [2022-10-06 06:06:36,421 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-06 06:06:36,432 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:36,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:36,432 INFO L85 PathProgramCache]: Analyzing trace with hash 603158823, now seen corresponding path program 1 times [2022-10-06 06:06:36,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:36,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943209231] [2022-10-06 06:06:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:36,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:36,528 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:36,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943209231] [2022-10-06 06:06:36,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943209231] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:36,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:36,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:36,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323997494] [2022-10-06 06:06:36,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:36,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-06 06:06:36,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:36,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-06 06:06:36,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-06 06:06:36,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,530 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:36,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 33.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:36,530 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,531 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:06:36,604 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:06:36,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-06 06:06:36,606 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:06:36,608 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (5/30) [2022-10-06 06:06:36,610 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:06:36,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:06:36,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:06:36,675 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) [2022-10-06 06:06:36,725 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 [2022-10-06 06:06:36,728 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:36,729 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:06:36,729 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:06:36,729 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:06:36,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:06:36,731 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:36,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:06:36,776 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:36,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:36,777 INFO L85 PathProgramCache]: Analyzing trace with hash 952416126, now seen corresponding path program 1 times [2022-10-06 06:06:36,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:36,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368231987] [2022-10-06 06:06:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:36,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:36,807 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:36,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368231987] [2022-10-06 06:06:36,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368231987] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:36,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:36,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:36,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570825214] [2022-10-06 06:06:36,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:36,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:06:36,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:36,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:06:36,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:06:36,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,810 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:36,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 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) [2022-10-06 06:06:36,810 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-06 06:06:36,821 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:36,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:36,821 INFO L85 PathProgramCache]: Analyzing trace with hash 603158824, now seen corresponding path program 1 times [2022-10-06 06:06:36,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:36,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482909765] [2022-10-06 06:06:36,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:36,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:36,923 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:36,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482909765] [2022-10-06 06:06:36,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482909765] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:36,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:36,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-06 06:06:36,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666765381] [2022-10-06 06:06:36,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:36,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-06 06:06:36,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:36,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-06 06:06:36,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-06 06:06:36,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,926 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:36,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 22.0) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:36,927 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,927 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:36,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:06:36,984 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:06:36,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-06 06:06:36,985 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:06:36,985 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (6/30) [2022-10-06 06:06:36,987 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:06:36,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:06:36,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:06:37,004 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-10-06 06:06:37,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (8)] Waiting until timeout for monitored process [2022-10-06 06:06:37,008 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:37,009 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:06:37,009 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:06:37,009 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:06:37,009 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:06:37,009 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:37,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:06:37,063 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:37,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:37,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1381746797, now seen corresponding path program 1 times [2022-10-06 06:06:37,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:37,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744747164] [2022-10-06 06:06:37,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:37,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:37,131 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:37,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744747164] [2022-10-06 06:06:37,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744747164] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:37,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:37,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:37,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117048491] [2022-10-06 06:06:37,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:37,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:06:37,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:37,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:06:37,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:06:37,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:37,134 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:37,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 38.0) internal successors, (76), 2 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) [2022-10-06 06:06:37,134 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:37,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:37,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-06 06:06:37,145 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:37,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:37,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1965351432, now seen corresponding path program 1 times [2022-10-06 06:06:37,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:37,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139213384] [2022-10-06 06:06:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:37,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:37,228 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:37,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139213384] [2022-10-06 06:06:37,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139213384] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:37,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:37,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:37,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21174792] [2022-10-06 06:06:37,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:37,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-06 06:06:37,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:37,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-06 06:06:37,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-06 06:06:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:37,231 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:37,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 37.5) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:37,232 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:37,232 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:37,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:37,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:06:37,422 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:06:37,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-06 06:06:37,424 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:06:37,424 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (7/30) [2022-10-06 06:06:37,427 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:06:37,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:06:37,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:06:37,445 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) [2022-10-06 06:06:37,446 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 [2022-10-06 06:06:37,448 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:37,449 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:06:37,450 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:06:37,450 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:06:37,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:06:37,450 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:37,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:06:37,483 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:37,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:37,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1381746796, now seen corresponding path program 1 times [2022-10-06 06:06:37,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:37,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138117903] [2022-10-06 06:06:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:37,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:37,500 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:37,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138117903] [2022-10-06 06:06:37,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138117903] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:37,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:37,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:37,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207049196] [2022-10-06 06:06:37,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:37,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:06:37,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:37,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:06:37,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:06:37,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:37,502 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:37,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 38.0) internal successors, (76), 2 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) [2022-10-06 06:06:37,502 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:37,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:37,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-10-06 06:06:37,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:37,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:37,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1965351433, now seen corresponding path program 1 times [2022-10-06 06:06:37,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:37,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423409550] [2022-10-06 06:06:37,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:37,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:37,577 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:37,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423409550] [2022-10-06 06:06:37,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423409550] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:37,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:37,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-06 06:06:37,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803643521] [2022-10-06 06:06:37,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:37,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-06 06:06:37,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:37,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-06 06:06:37,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-06 06:06:37,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:37,579 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:37,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 25.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:37,579 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:37,580 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:37,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:37,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:06:37,769 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:06:37,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-10-06 06:06:37,771 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:06:37,772 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (8/30) [2022-10-06 06:06:37,776 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:06:37,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:06:37,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:06:37,788 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) [2022-10-06 06:06:37,859 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 [2022-10-06 06:06:37,862 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:37,863 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:06:37,863 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:06:37,864 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:06:37,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:06:37,864 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:37,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:06:37,911 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:37,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:37,911 INFO L85 PathProgramCache]: Analyzing trace with hash 873333293, now seen corresponding path program 1 times [2022-10-06 06:06:37,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:37,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225695605] [2022-10-06 06:06:37,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:37,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:37,935 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:37,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225695605] [2022-10-06 06:06:37,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225695605] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:37,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:37,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:37,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611473167] [2022-10-06 06:06:37,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:37,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:06:37,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:37,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:06:37,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:06:37,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:37,937 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:37,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:37,938 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:37,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:37,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-10-06 06:06:37,945 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:37,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:37,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1356957641, now seen corresponding path program 1 times [2022-10-06 06:06:37,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:37,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73421555] [2022-10-06 06:06:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:37,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:37,998 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:37,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73421555] [2022-10-06 06:06:37,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73421555] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:38,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:38,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:38,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290033867] [2022-10-06 06:06:38,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:38,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-06 06:06:38,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:38,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-06 06:06:38,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-06 06:06:38,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:38,003 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:38,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 42.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:38,003 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:38,003 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:38,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:38,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:06:38,598 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:06:38,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-10-06 06:06:38,599 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:06:38,599 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (9/30) [2022-10-06 06:06:38,601 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:06:38,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:06:38,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:06:38,603 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) [2022-10-06 06:06:38,604 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 [2022-10-06 06:06:38,609 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:38,610 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:06:38,610 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:06:38,610 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:06:38,610 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:06:38,611 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:38,611 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:06:38,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:38,677 INFO L85 PathProgramCache]: Analyzing trace with hash 873333294, now seen corresponding path program 1 times [2022-10-06 06:06:38,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:38,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356315017] [2022-10-06 06:06:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:38,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:38,704 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:38,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356315017] [2022-10-06 06:06:38,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356315017] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:38,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:38,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:38,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819213017] [2022-10-06 06:06:38,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:38,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:06:38,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:38,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:06:38,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:06:38,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:38,705 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:38,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:38,706 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:38,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-10-06 06:06:38,714 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:38,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:38,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1356957640, now seen corresponding path program 1 times [2022-10-06 06:06:38,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:38,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126992514] [2022-10-06 06:06:38,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:38,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:38,788 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:38,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126992514] [2022-10-06 06:06:38,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126992514] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:38,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:38,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-06 06:06:38,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964526562] [2022-10-06 06:06:38,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:38,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-06 06:06:38,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:38,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-06 06:06:38,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-06 06:06:38,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:38,789 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:38,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 28.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:38,790 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:38,790 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:39,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:39,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:06:39,332 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:06:39,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-10-06 06:06:39,337 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:06:39,337 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (10/30) [2022-10-06 06:06:39,340 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:06:39,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:06:39,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:06:39,351 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-10-06 06:06:39,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (12)] Waiting until timeout for monitored process [2022-10-06 06:06:39,364 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:39,365 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:06:39,365 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:06:39,365 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:06:39,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:06:39,365 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:39,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:06:39,409 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:39,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:39,409 INFO L85 PathProgramCache]: Analyzing trace with hash 437627017, now seen corresponding path program 1 times [2022-10-06 06:06:39,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:39,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605200966] [2022-10-06 06:06:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:39,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:39,432 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:39,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605200966] [2022-10-06 06:06:39,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605200966] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:39,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:39,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:39,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634591019] [2022-10-06 06:06:39,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:39,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:06:39,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:39,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:06:39,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:06:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:39,433 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:39,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 47.0) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:39,434 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:39,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:39,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-10-06 06:06:39,445 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:39,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:39,445 INFO L85 PathProgramCache]: Analyzing trace with hash -571897186, now seen corresponding path program 1 times [2022-10-06 06:06:39,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:39,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505274366] [2022-10-06 06:06:39,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:39,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:39,487 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:39,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505274366] [2022-10-06 06:06:39,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505274366] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:39,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:39,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:39,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412938144] [2022-10-06 06:06:39,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:39,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-06 06:06:39,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:39,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-06 06:06:39,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-06 06:06:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:39,489 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:39,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 46.5) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:39,489 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:39,489 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:41,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:41,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:06:41,838 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:06:41,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-10-06 06:06:41,839 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:06:41,840 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (11/30) [2022-10-06 06:06:41,842 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:06:41,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:06:41,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:06:41,844 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) [2022-10-06 06:06:41,845 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 [2022-10-06 06:06:41,847 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:41,847 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:06:41,847 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:06:41,847 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:06:41,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:06:41,848 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:41,848 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:06:41,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:41,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash 437627018, now seen corresponding path program 1 times [2022-10-06 06:06:41,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:41,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280221920] [2022-10-06 06:06:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:41,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:42,021 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:42,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280221920] [2022-10-06 06:06:42,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280221920] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:42,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:42,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:42,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413504745] [2022-10-06 06:06:42,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:42,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:06:42,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:42,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:06:42,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:06:42,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:42,023 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:42,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 47.0) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:42,023 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:42,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:42,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-10-06 06:06:42,033 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:42,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:42,034 INFO L85 PathProgramCache]: Analyzing trace with hash -571897185, now seen corresponding path program 1 times [2022-10-06 06:06:42,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:42,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832530680] [2022-10-06 06:06:42,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:42,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:42,086 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:42,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832530680] [2022-10-06 06:06:42,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832530680] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:42,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:42,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:42,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221689928] [2022-10-06 06:06:42,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:42,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-06 06:06:42,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:42,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-06 06:06:42,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-06 06:06:42,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:42,088 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:42,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 46.5) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:42,089 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:42,089 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:44,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:44,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:06:44,259 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:06:44,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-10-06 06:06:44,261 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:06:44,262 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (12/30) [2022-10-06 06:06:44,266 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:06:44,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:06:44,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:06:44,268 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-10-06 06:06:44,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (14)] Waiting until timeout for monitored process [2022-10-06 06:06:44,271 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:44,272 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:06:44,272 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:06:44,272 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:06:44,273 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:06:44,273 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:44,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:06:44,310 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:44,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:44,311 INFO L85 PathProgramCache]: Analyzing trace with hash -935392146, now seen corresponding path program 1 times [2022-10-06 06:06:44,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:44,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705741614] [2022-10-06 06:06:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:44,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:44,456 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:44,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705741614] [2022-10-06 06:06:44,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705741614] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:44,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:44,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:44,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215706512] [2022-10-06 06:06:44,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:44,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:06:44,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:44,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:06:44,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:06:44,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:44,459 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:44,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:44,459 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:44,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:44,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-10-06 06:06:44,469 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:44,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:44,470 INFO L85 PathProgramCache]: Analyzing trace with hash -237604520, now seen corresponding path program 1 times [2022-10-06 06:06:44,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:44,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665836299] [2022-10-06 06:06:44,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:44,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:44,518 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:44,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665836299] [2022-10-06 06:06:44,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665836299] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:44,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:44,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:44,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725248508] [2022-10-06 06:06:44,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:44,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-06 06:06:44,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:44,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-06 06:06:44,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-06 06:06:44,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:44,521 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:44,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 50.0) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:44,521 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:44,521 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:53,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:53,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:06:53,735 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:06:53,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-10-06 06:06:53,736 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:06:53,737 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (13/30) [2022-10-06 06:06:53,739 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:06:53,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:06:53,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:06:53,784 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) [2022-10-06 06:06:53,786 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 [2022-10-06 06:06:53,788 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:53,788 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:06:53,789 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:06:53,789 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:06:53,789 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:06:53,789 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:06:53,789 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:06:53,830 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:53,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:53,831 INFO L85 PathProgramCache]: Analyzing trace with hash -935392145, now seen corresponding path program 1 times [2022-10-06 06:06:53,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:53,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958270815] [2022-10-06 06:06:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:53,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:53,857 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:53,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958270815] [2022-10-06 06:06:53,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958270815] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:53,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:53,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:06:53,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472992791] [2022-10-06 06:06:53,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:53,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:06:53,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:53,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:06:53,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:06:53,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:53,859 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:53,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:53,859 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:53,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:53,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-10-06 06:06:53,870 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:06:53,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:06:53,870 INFO L85 PathProgramCache]: Analyzing trace with hash -237604519, now seen corresponding path program 1 times [2022-10-06 06:06:53,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:06:53,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332642361] [2022-10-06 06:06:53,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:06:53,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:06:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:06:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:06:53,952 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:06:53,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332642361] [2022-10-06 06:06:53,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332642361] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:06:53,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:06:53,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-06 06:06:53,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691875970] [2022-10-06 06:06:53,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:06:53,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-06 06:06:53,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:06:53,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-06 06:06:53,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-06 06:06:53,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:53,954 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:06:53,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 33.333333333333336) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:06:53,954 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:06:53,954 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:02,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:02,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:07:02,848 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:07:02,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-10-06 06:07:02,850 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:07:02,850 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (14/30) [2022-10-06 06:07:02,852 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:07:02,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:07:02,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:07:02,891 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-10-06 06:07:02,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (16)] Waiting until timeout for monitored process [2022-10-06 06:07:02,941 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:07:02,942 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:07:02,942 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:07:02,942 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:07:02,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:07:02,943 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:07:02,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:07:02,989 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:07:02,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:07:02,990 INFO L85 PathProgramCache]: Analyzing trace with hash -519162233, now seen corresponding path program 1 times [2022-10-06 06:07:02,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:07:02,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190441210] [2022-10-06 06:07:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:07:02,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:07:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:07:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:07:03,019 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:07:03,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190441210] [2022-10-06 06:07:03,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190441210] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:07:03,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:07:03,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:07:03,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658644957] [2022-10-06 06:07:03,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:07:03,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:07:03,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:07:03,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:07:03,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:07:03,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:03,021 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:07:03,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 52.0) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:07:03,022 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:03,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:03,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-10-06 06:07:03,039 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:07:03,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:07:03,040 INFO L85 PathProgramCache]: Analyzing trace with hash -369708707, now seen corresponding path program 1 times [2022-10-06 06:07:03,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:07:03,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896736851] [2022-10-06 06:07:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:07:03,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:07:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:07:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:07:03,096 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:07:03,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896736851] [2022-10-06 06:07:03,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896736851] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:07:03,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:07:03,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:07:03,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139238483] [2022-10-06 06:07:03,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:07:03,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-06 06:07:03,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:07:03,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-06 06:07:03,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-06 06:07:03,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:03,098 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:07:03,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 51.5) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:07:03,098 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:03,098 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:16,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:16,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:07:16,284 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:07:16,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-10-06 06:07:16,285 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:07:16,285 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (15/30) [2022-10-06 06:07:16,287 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:07:16,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:07:16,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:07:16,313 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) [2022-10-06 06:07:16,314 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 [2022-10-06 06:07:16,316 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:07:16,317 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:07:16,317 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:07:16,317 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:07:16,317 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:07:16,318 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:07:16,318 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:07:16,372 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:07:16,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:07:16,373 INFO L85 PathProgramCache]: Analyzing trace with hash -519162232, now seen corresponding path program 1 times [2022-10-06 06:07:16,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:07:16,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574354360] [2022-10-06 06:07:16,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:07:16,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:07:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:07:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:07:16,397 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:07:16,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574354360] [2022-10-06 06:07:16,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574354360] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:07:16,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:07:16,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:07:16,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382473636] [2022-10-06 06:07:16,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:07:16,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:07:16,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:07:16,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:07:16,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:07:16,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:16,399 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:07:16,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 52.0) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:07:16,399 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:16,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-10-06 06:07:16,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:07:16,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:07:16,411 INFO L85 PathProgramCache]: Analyzing trace with hash -369708706, now seen corresponding path program 1 times [2022-10-06 06:07:16,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:07:16,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603220753] [2022-10-06 06:07:16,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:07:16,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:07:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:07:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:07:16,482 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:07:16,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603220753] [2022-10-06 06:07:16,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603220753] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:07:16,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:07:16,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-06 06:07:16,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368718191] [2022-10-06 06:07:16,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:07:16,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-06 06:07:16,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:07:16,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-06 06:07:16,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-06 06:07:16,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:16,484 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:07:16,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 34.333333333333336) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:07:16,485 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:16,485 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:07:29,274 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:07:29,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-10-06 06:07:29,274 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:07:29,275 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (16/30) [2022-10-06 06:07:29,277 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:07:29,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:07:29,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:07:29,279 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) [2022-10-06 06:07:29,280 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 [2022-10-06 06:07:29,287 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:07:29,288 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:07:29,288 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:07:29,288 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:07:29,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:07:29,289 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:07:29,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:07:29,333 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:07:29,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:07:29,333 INFO L85 PathProgramCache]: Analyzing trace with hash -184410464, now seen corresponding path program 1 times [2022-10-06 06:07:29,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:07:29,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138756311] [2022-10-06 06:07:29,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:07:29,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:07:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:07:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:07:29,357 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:07:29,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138756311] [2022-10-06 06:07:29,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138756311] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:07:29,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:07:29,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:07:29,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727478314] [2022-10-06 06:07:29,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:07:29,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:07:29,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:07:29,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:07:29,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:07:29,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:29,359 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:07:29,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 53.5) internal successors, (107), 2 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) [2022-10-06 06:07:29,359 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:29,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:29,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-10-06 06:07:29,372 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:07:29,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:07:29,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1695503350, now seen corresponding path program 1 times [2022-10-06 06:07:29,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:07:29,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552946855] [2022-10-06 06:07:29,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:07:29,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:07:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:07:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:07:29,411 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:07:29,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552946855] [2022-10-06 06:07:29,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552946855] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:07:29,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:07:29,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:07:29,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413388512] [2022-10-06 06:07:29,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:07:29,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-06 06:07:29,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:07:29,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-06 06:07:29,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-06 06:07:29,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:29,413 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:07:29,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 53.0) internal successors, (106), 3 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) [2022-10-06 06:07:29,414 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:29,414 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:42,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:42,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:07:42,990 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:07:42,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-10-06 06:07:42,991 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:07:42,991 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (17/30) [2022-10-06 06:07:42,994 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:07:42,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:07:42,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:07:43,004 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) [2022-10-06 06:07:43,005 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 [2022-10-06 06:07:43,012 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:07:43,012 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:07:43,013 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:07:43,013 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:07:43,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:07:43,013 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:07:43,013 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:07:43,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:07:43,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:07:43,045 INFO L85 PathProgramCache]: Analyzing trace with hash -184410463, now seen corresponding path program 1 times [2022-10-06 06:07:43,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:07:43,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962566893] [2022-10-06 06:07:43,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:07:43,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:07:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:07:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:07:43,068 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:07:43,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962566893] [2022-10-06 06:07:43,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962566893] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:07:43,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:07:43,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:07:43,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844936642] [2022-10-06 06:07:43,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:07:43,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:07:43,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:07:43,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:07:43,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:07:43,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:43,069 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:07:43,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 53.5) internal successors, (107), 2 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) [2022-10-06 06:07:43,070 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:43,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:43,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-10-06 06:07:43,083 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:07:43,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:07:43,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1695503349, now seen corresponding path program 1 times [2022-10-06 06:07:43,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:07:43,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966014788] [2022-10-06 06:07:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:07:43,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:07:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:07:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:07:43,141 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:07:43,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966014788] [2022-10-06 06:07:43,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966014788] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:07:43,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:07:43,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-06 06:07:43,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832544468] [2022-10-06 06:07:43,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:07:43,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-06 06:07:43,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:07:43,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-06 06:07:43,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-06 06:07:43,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:43,143 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:07:43,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 35.333333333333336) internal successors, (106), 4 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) [2022-10-06 06:07:43,144 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:43,144 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:57,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:57,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:07:57,060 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:07:57,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-10-06 06:07:57,069 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:07:57,070 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (18/30) [2022-10-06 06:07:57,084 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:07:57,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:07:57,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:07:57,104 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-10-06 06:07:57,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (20)] Waiting until timeout for monitored process [2022-10-06 06:07:57,151 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:07:57,152 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:07:57,152 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:07:57,152 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:07:57,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:07:57,154 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:07:57,154 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:07:57,191 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:07:57,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:07:57,191 INFO L85 PathProgramCache]: Analyzing trace with hash -508518104, now seen corresponding path program 1 times [2022-10-06 06:07:57,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:07:57,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526063506] [2022-10-06 06:07:57,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:07:57,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:07:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:07:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:07:57,221 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:07:57,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526063506] [2022-10-06 06:07:57,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526063506] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:07:57,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:07:57,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:07:57,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182764152] [2022-10-06 06:07:57,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:07:57,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:07:57,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:07:57,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:07:57,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:07:57,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:57,223 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:07:57,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 55.0) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:07:57,223 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:57,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:57,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-10-06 06:07:57,237 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:07:57,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:07:57,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1924455554, now seen corresponding path program 1 times [2022-10-06 06:07:57,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:07:57,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703556637] [2022-10-06 06:07:57,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:07:57,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:07:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:07:57,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:07:57,279 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:07:57,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703556637] [2022-10-06 06:07:57,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703556637] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:07:57,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:07:57,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:07:57,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361238911] [2022-10-06 06:07:57,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:07:57,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-06 06:07:57,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:07:57,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-06 06:07:57,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-06 06:07:57,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:57,281 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:07:57,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 54.5) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:07:57,281 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:07:57,282 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:10,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:08:10,809 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:08:10,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-10-06 06:08:10,810 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:08:10,811 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (19/30) [2022-10-06 06:08:10,813 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:08:10,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:08:10,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:08:10,815 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) [2022-10-06 06:08:10,816 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 [2022-10-06 06:08:10,819 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:08:10,819 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:08:10,820 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:08:10,820 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:08:10,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:08:10,820 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:08:10,820 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:08:10,886 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:08:10,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:08:10,887 INFO L85 PathProgramCache]: Analyzing trace with hash -508518103, now seen corresponding path program 1 times [2022-10-06 06:08:10,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:08:10,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430848554] [2022-10-06 06:08:10,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:08:10,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:08:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:08:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:08:10,910 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:08:10,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430848554] [2022-10-06 06:08:10,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430848554] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:08:10,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:08:10,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:08:10,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634835854] [2022-10-06 06:08:10,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:08:10,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:08:10,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:08:10,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:08:10,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:08:10,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:10,912 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:08:10,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 55.0) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:08:10,912 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:10,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:10,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-10-06 06:08:10,926 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:08:10,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:08:10,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1924455553, now seen corresponding path program 1 times [2022-10-06 06:08:10,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:08:10,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373130470] [2022-10-06 06:08:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:08:10,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:08:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:08:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:08:10,979 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:08:10,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373130470] [2022-10-06 06:08:10,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373130470] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:08:10,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:08:10,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-06 06:08:10,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724917914] [2022-10-06 06:08:10,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:08:10,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-06 06:08:10,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:08:10,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-06 06:08:10,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-06 06:08:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:10,981 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:08:10,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 36.333333333333336) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:08:10,981 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:10,981 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:24,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:08:24,596 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:08:24,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-10-06 06:08:24,597 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:08:24,597 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (20/30) [2022-10-06 06:08:24,599 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:08:24,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:08:24,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:08:24,601 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-10-06 06:08:24,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (22)] Waiting until timeout for monitored process [2022-10-06 06:08:24,610 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:08:24,611 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:08:24,611 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:08:24,611 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:08:24,611 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:08:24,612 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:08:24,612 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:08:24,653 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:08:24,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:08:24,654 INFO L85 PathProgramCache]: Analyzing trace with hash -912737501, now seen corresponding path program 1 times [2022-10-06 06:08:24,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:08:24,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175837431] [2022-10-06 06:08:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:08:24,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:08:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:08:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:08:24,676 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:08:24,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175837431] [2022-10-06 06:08:24,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175837431] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:08:24,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:08:24,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:08:24,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167046454] [2022-10-06 06:08:24,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:08:24,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:08:24,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:08:24,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:08:24,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:08:24,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:24,678 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:08:24,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 56.5) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:08:24,678 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:24,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:24,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-10-06 06:08:24,692 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:08:24,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:08:24,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2063470861, now seen corresponding path program 1 times [2022-10-06 06:08:24,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:08:24,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143458888] [2022-10-06 06:08:24,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:08:24,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:08:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:08:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:08:24,731 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:08:24,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143458888] [2022-10-06 06:08:24,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143458888] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:08:24,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:08:24,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:08:24,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793494863] [2022-10-06 06:08:24,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:08:24,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-06 06:08:24,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:08:24,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-06 06:08:24,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-06 06:08:24,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:24,732 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:08:24,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 56.0) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:08:24,733 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:24,733 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:38,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:38,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:08:38,318 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:08:38,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-10-06 06:08:38,319 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:08:38,319 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (21/30) [2022-10-06 06:08:38,321 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:08:38,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:08:38,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:08:38,324 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-10-06 06:08:38,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (23)] Waiting until timeout for monitored process [2022-10-06 06:08:38,328 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:08:38,329 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:08:38,329 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:08:38,329 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:08:38,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:08:38,329 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:08:38,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:08:38,370 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:08:38,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:08:38,371 INFO L85 PathProgramCache]: Analyzing trace with hash -912737500, now seen corresponding path program 1 times [2022-10-06 06:08:38,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:08:38,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470285349] [2022-10-06 06:08:38,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:08:38,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:08:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:08:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:08:38,395 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:08:38,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470285349] [2022-10-06 06:08:38,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470285349] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:08:38,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:08:38,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:08:38,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867926711] [2022-10-06 06:08:38,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:08:38,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:08:38,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:08:38,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:08:38,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:08:38,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:38,397 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:08:38,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 56.5) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:08:38,397 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:38,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:38,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-10-06 06:08:38,410 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:08:38,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:08:38,411 INFO L85 PathProgramCache]: Analyzing trace with hash 2063470862, now seen corresponding path program 1 times [2022-10-06 06:08:38,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:08:38,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999583039] [2022-10-06 06:08:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:08:38,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:08:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:08:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:08:38,464 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:08:38,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999583039] [2022-10-06 06:08:38,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999583039] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:08:38,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:08:38,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-06 06:08:38,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463250025] [2022-10-06 06:08:38,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:08:38,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-06 06:08:38,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:08:38,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-06 06:08:38,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-06 06:08:38,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:38,466 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:08:38,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:08:38,466 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:38,466 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:52,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:52,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-06 06:08:52,918 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 1 remaining) [2022-10-06 06:08:52,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-10-06 06:08:52,919 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-06 06:08:52,919 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE was SAFE (22/30) [2022-10-06 06:08:52,921 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-10-06 06:08:52,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-10-06 06:08:52,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-06 06:08:52,932 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-10-06 06:08:52,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (24)] Waiting until timeout for monitored process [2022-10-06 06:08:52,942 INFO L100 denceProviderFactory]: Independence Relation #2: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:08:52,943 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 2 independence relations. [2022-10-06 06:08:52,943 WARN L162 artialOrderCegarLoop]: Attention: Unsuitable combinations of independence relations may be unsound! [2022-10-06 06:08:52,943 WARN L163 artialOrderCegarLoop]: Only combine independence relations if you are sure the combination is sound. [2022-10-06 06:08:52,943 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE ======== [2022-10-06 06:08:52,944 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;@d36a4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-06 06:08:52,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-06 06:08:53,002 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:08:53,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:08:53,002 INFO L85 PathProgramCache]: Analyzing trace with hash 75501965, now seen corresponding path program 1 times [2022-10-06 06:08:53,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:08:53,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976566290] [2022-10-06 06:08:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:08:53,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:08:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:08:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:08:53,027 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:08:53,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976566290] [2022-10-06 06:08:53,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976566290] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:08:53,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:08:53,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:08:53,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145135486] [2022-10-06 06:08:53,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:08:53,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-06 06:08:53,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:08:53,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-06 06:08:53,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-06 06:08:53,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:53,029 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:08:53,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 58.0) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:08:53,029 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:53,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:53,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-10-06 06:08:53,044 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2022-10-06 06:08:53,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-06 06:08:53,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1006044317, now seen corresponding path program 1 times [2022-10-06 06:08:53,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy BADGER [2022-10-06 06:08:53,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930264277] [2022-10-06 06:08:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-06 06:08:53,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-06 06:08:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-06 06:08:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-06 06:08:53,086 INFO L136 FreeRefinementEngine]: Strategy BADGER found an infeasible trace [2022-10-06 06:08:53,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930264277] [2022-10-06 06:08:53,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930264277] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-06 06:08:53,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-06 06:08:53,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-06 06:08:53,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943590152] [2022-10-06 06:08:53,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-06 06:08:53,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-06 06:08:53,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy BADGER [2022-10-06 06:08:53,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-06 06:08:53,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-06 06:08:53,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:53,088 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-10-06 06:08:53,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 57.5) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-06 06:08:53,089 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-10-06 06:08:53,089 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states.