/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops/linear_sea.ch.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 20:29:33,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 20:29:33,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 20:29:33,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 20:29:33,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 20:29:33,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 20:29:33,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 20:29:33,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 20:29:33,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 20:29:33,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 20:29:33,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 20:29:33,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 20:29:33,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 20:29:33,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 20:29:33,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 20:29:33,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 20:29:33,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 20:29:33,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 20:29:33,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 20:29:33,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 20:29:33,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 20:29:33,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 20:29:33,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 20:29:33,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 20:29:33,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-23 20:29:33,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-23 20:29:33,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-23 20:29:33,893 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-23 20:29:33,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-23 20:29:33,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-02-23 20:29:33,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 20:29:33,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 20:29:33,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 20:29:33,898 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 20:29:33,913 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 20:29:33,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 20:29:33,914 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 20:29:33,914 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 20:29:33,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 20:29:33,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 20:29:33,915 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 20:29:33,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 20:29:33,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 20:29:33,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 20:29:33,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 20:29:33,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 20:29:33,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 20:29:33,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 20:29:33,915 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 20:29:33,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 20:29:33,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 20:29:33,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 20:29:33,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 20:29:33,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 20:29:33,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 20:29:33,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 20:29:33,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 20:29:33,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 20:29:33,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 20:29:33,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 20:29:33,916 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 20:29:33,916 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 20:29:33,917 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 20:29:33,917 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 20:29:34,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 20:29:34,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 20:29:34,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 20:29:34,104 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 20:29:34,105 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 20:29:34,105 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch.c [2022-02-23 20:29:34,163 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f18f457d/ce8b27c7da474e60813e3448c6ee480c/FLAG53e9033ab [2022-02-23 20:29:34,501 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 20:29:34,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch.c [2022-02-23 20:29:34,505 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f18f457d/ce8b27c7da474e60813e3448c6ee480c/FLAG53e9033ab [2022-02-23 20:29:34,513 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f18f457d/ce8b27c7da474e60813e3448c6ee480c [2022-02-23 20:29:34,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 20:29:34,516 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 20:29:34,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 20:29:34,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 20:29:34,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 20:29:34,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 08:29:34" (1/1) ... [2022-02-23 20:29:34,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@791a176b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34, skipping insertion in model container [2022-02-23 20:29:34,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 08:29:34" (1/1) ... [2022-02-23 20:29:34,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 20:29:34,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 20:29:34,664 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch.c[383,396] [2022-02-23 20:29:34,674 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 20:29:34,682 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 20:29:34,692 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch.c[383,396] [2022-02-23 20:29:34,698 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 20:29:34,708 INFO L208 MainTranslator]: Completed translation [2022-02-23 20:29:34,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34 WrapperNode [2022-02-23 20:29:34,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 20:29:34,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 20:29:34,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 20:29:34,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 20:29:34,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34" (1/1) ... [2022-02-23 20:29:34,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34" (1/1) ... [2022-02-23 20:29:34,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34" (1/1) ... [2022-02-23 20:29:34,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34" (1/1) ... [2022-02-23 20:29:34,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34" (1/1) ... [2022-02-23 20:29:34,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34" (1/1) ... [2022-02-23 20:29:34,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34" (1/1) ... [2022-02-23 20:29:34,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 20:29:34,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 20:29:34,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 20:29:34,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 20:29:34,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34" (1/1) ... [2022-02-23 20:29:34,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 20:29:34,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:29:34,811 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) [2022-02-23 20:29:34,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 20:29:34,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 20:29:34,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 20:29:34,837 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 20:29:34,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 20:29:34,837 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2022-02-23 20:29:34,838 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 20:29:34,838 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-02-23 20:29:34,838 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 20:29:34,839 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 20:29:34,839 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 20:29:34,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 20:29:34,839 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-02-23 20:29:34,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 20:29:34,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-23 20:29:34,840 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2022-02-23 20:29:34,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 20:29:34,840 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 20:29:34,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-02-23 20:29:34,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-02-23 20:29:34,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 20:29:34,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 20:29:34,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 20:29:34,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 20:29:34,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 20:29:34,899 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 20:29:34,900 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 20:29:35,062 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 20:29:35,066 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 20:29:35,066 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 20:29:35,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:29:35 BoogieIcfgContainer [2022-02-23 20:29:35,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 20:29:35,068 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 20:29:35,068 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 20:29:35,071 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 20:29:35,073 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:29:35" (1/1) ... [2022-02-23 20:29:35,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 08:29:35 BasicIcfg [2022-02-23 20:29:35,098 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 20:29:35,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 20:29:35,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 20:29:35,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 20:29:35,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 08:29:34" (1/4) ... [2022-02-23 20:29:35,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e128d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 08:29:35, skipping insertion in model container [2022-02-23 20:29:35,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:34" (2/4) ... [2022-02-23 20:29:35,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e128d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 08:29:35, skipping insertion in model container [2022-02-23 20:29:35,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:29:35" (3/4) ... [2022-02-23 20:29:35,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e128d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 08:29:35, skipping insertion in model container [2022-02-23 20:29:35,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 08:29:35" (4/4) ... [2022-02-23 20:29:35,105 INFO L111 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.cqvasr [2022-02-23 20:29:35,108 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 20:29:35,109 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 20:29:35,154 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 20:29:35,162 INFO L339 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=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 20:29:35,162 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 20:29:35,192 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 20:29:35,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 20:29:35,196 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:35,197 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:29:35,197 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:35,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:35,201 INFO L85 PathProgramCache]: Analyzing trace with hash -679551393, now seen corresponding path program 1 times [2022-02-23 20:29:35,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:35,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474659214] [2022-02-23 20:29:35,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:35,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:35,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:29:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:35,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 20:29:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:35,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 20:29:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:29:35,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:29:35,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474659214] [2022-02-23 20:29:35,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474659214] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:29:35,455 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:29:35,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 20:29:35,456 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991357185] [2022-02-23 20:29:35,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:29:35,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 20:29:35,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:29:35,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 20:29:35,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 20:29:35,477 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 20:29:35,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:29:35,560 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-02-23 20:29:35,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 20:29:35,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-02-23 20:29:35,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:29:35,567 INFO L225 Difference]: With dead ends: 51 [2022-02-23 20:29:35,567 INFO L226 Difference]: Without dead ends: 26 [2022-02-23 20:29:35,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 20:29:35,574 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 20:29:35,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 37 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 20:29:35,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-23 20:29:35,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-02-23 20:29:35,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 20:29:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-02-23 20:29:35,604 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2022-02-23 20:29:35,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:29:35,605 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-02-23 20:29:35,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 20:29:35,605 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-02-23 20:29:35,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-23 20:29:35,606 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:35,607 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:29:35,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 20:29:35,607 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:35,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:35,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1069263323, now seen corresponding path program 1 times [2022-02-23 20:29:35,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:35,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92757494] [2022-02-23 20:29:35,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:35,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:35,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:29:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:35,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 20:29:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:35,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 20:29:35,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:29:35,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:29:35,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92757494] [2022-02-23 20:29:35,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92757494] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:29:35,750 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:29:35,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-23 20:29:35,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596557194] [2022-02-23 20:29:35,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:29:35,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 20:29:35,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:29:35,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 20:29:35,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-23 20:29:35,753 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 20:29:35,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:29:35,912 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-02-23 20:29:35,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 20:29:35,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-02-23 20:29:35,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:29:35,921 INFO L225 Difference]: With dead ends: 34 [2022-02-23 20:29:35,921 INFO L226 Difference]: Without dead ends: 26 [2022-02-23 20:29:35,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-02-23 20:29:35,923 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:29:35,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 48 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:29:35,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-23 20:29:35,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-02-23 20:29:35,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 20:29:35,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-02-23 20:29:35,928 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 25 [2022-02-23 20:29:35,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:29:35,928 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-02-23 20:29:35,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 20:29:35,929 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-02-23 20:29:35,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-23 20:29:35,929 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:35,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:29:35,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 20:29:35,930 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:35,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:35,930 INFO L85 PathProgramCache]: Analyzing trace with hash 673547012, now seen corresponding path program 1 times [2022-02-23 20:29:35,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:35,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729673152] [2022-02-23 20:29:35,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:35,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:36,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:29:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:36,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 20:29:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:36,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 20:29:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:29:36,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:29:36,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729673152] [2022-02-23 20:29:36,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729673152] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:29:36,147 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:29:36,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-23 20:29:36,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981257982] [2022-02-23 20:29:36,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:29:36,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 20:29:36,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:29:36,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 20:29:36,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-23 20:29:36,149 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 20:29:38,317 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-23 20:29:38,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:29:38,609 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-02-23 20:29:38,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-23 20:29:38,610 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-02-23 20:29:38,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:29:38,611 INFO L225 Difference]: With dead ends: 39 [2022-02-23 20:29:38,611 INFO L226 Difference]: Without dead ends: 30 [2022-02-23 20:29:38,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-02-23 20:29:38,612 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-23 20:29:38,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 37 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 98 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-02-23 20:29:38,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-23 20:29:38,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-02-23 20:29:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 20:29:38,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-02-23 20:29:38,618 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2022-02-23 20:29:38,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:29:38,618 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-02-23 20:29:38,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 20:29:38,618 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-02-23 20:29:38,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-23 20:29:38,619 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:38,619 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:29:38,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-23 20:29:38,619 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:38,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:38,619 INFO L85 PathProgramCache]: Analyzing trace with hash -977632473, now seen corresponding path program 1 times [2022-02-23 20:29:38,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:38,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267224185] [2022-02-23 20:29:38,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:38,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:38,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:29:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:38,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 20:29:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:38,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 20:29:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:29:38,875 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:29:38,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267224185] [2022-02-23 20:29:38,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267224185] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:29:38,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036679141] [2022-02-23 20:29:38,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:38,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:29:38,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:29:38,890 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 20:29:38,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process