/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops/nec20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:37:53,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:37:53,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:37:53,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 17:37:53,699 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 17:37:53,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 17:37:53,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 17:37:53,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 17:37:53,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 17:37:53,712 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 17:37:53,713 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 17:37:53,714 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 17:37:53,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:37:53,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:37:53,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:37:53,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:37:53,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:37:53,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:37:53,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:37:53,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:37:53,730 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:37:53,731 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:37:53,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:37:53,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:37:53,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 17:37:53,738 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 17:37:53,738 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 17:37:53,739 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 17:37:53,739 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 17:37:53,740 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 17:37:53,740 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 17:37:53,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 17:37:53,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 17:37:53,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:37:53,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:37:53,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:37:53,745 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 17:37:53,759 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:37:53,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:37:53,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:37:53,765 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:37:53,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:37:53,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:37:53,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:37:53,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:37:53,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:37:53,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:37:53,767 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:37:53,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:37:53,767 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:37:53,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:37:53,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:37:53,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:37:53,768 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 17:37:53,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:37:53,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:37:53,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:37:53,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:37:53,769 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 17:37:53,769 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:37:54,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:37:54,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:37:54,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:37:54,043 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:37:54,043 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:37:54,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2021-05-02 17:37:54,085 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10e654e19/5a6ca2aa726a4e6b9b461877b3c5bfd1/FLAG56bf59bf7 [2021-05-02 17:37:54,424 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:37:54,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c [2021-05-02 17:37:54,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10e654e19/5a6ca2aa726a4e6b9b461877b3c5bfd1/FLAG56bf59bf7 [2021-05-02 17:37:54,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10e654e19/5a6ca2aa726a4e6b9b461877b3c5bfd1 [2021-05-02 17:37:54,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:37:54,446 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 17:37:54,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:37:54,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:37:54,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:37:54,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:37:54" (1/1) ... [2021-05-02 17:37:54,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@343adf3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:54, skipping insertion in model container [2021-05-02 17:37:54,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:37:54" (1/1) ... [2021-05-02 17:37:54,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:37:54,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:37:54,578 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c[356,369] [2021-05-02 17:37:54,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:37:54,597 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:37:54,650 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c[356,369] [2021-05-02 17:37:54,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:37:54,667 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:37:54,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:54 WrapperNode [2021-05-02 17:37:54,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:37:54,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:37:54,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:37:54,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:37:54,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:54" (1/1) ... [2021-05-02 17:37:54,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:54" (1/1) ... [2021-05-02 17:37:54,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:54" (1/1) ... [2021-05-02 17:37:54,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:54" (1/1) ... [2021-05-02 17:37:54,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:54" (1/1) ... [2021-05-02 17:37:54,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:54" (1/1) ... [2021-05-02 17:37:54,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:54" (1/1) ... [2021-05-02 17:37:54,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:37:54,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:37:54,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:37:54,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:37:54,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:37:54,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:37:54,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:37:54,767 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:37:54,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:37:54,767 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:37:54,767 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:37:54,767 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:37:54,767 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:37:54,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:37:54,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 17:37:54,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:37:54,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-02 17:37:54,768 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:37:54,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:37:54,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:37:54,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:37:54,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:37:54,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:37:54,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:37:54,990 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:37:54,990 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:37:54,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:37:54 BoogieIcfgContainer [2021-05-02 17:37:54,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:37:54,992 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 17:37:54,992 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 17:37:54,992 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 17:37:54,994 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:37:54" (1/1) ... [2021-05-02 17:37:55,051 INFO L181 rdanLoopAcceleration]: Guard: Formula: (<= (mod v_main_~i~0_5 4294967296) (mod v_main_~n~0_5 4294967296)) InVars {main_~i~0=v_main_~i~0_5, main_~n~0=v_main_~n~0_5} OutVars{main_~i~0=v_main_~i~0_5, main_~n~0=v_main_~n~0_5} AuxVars[] AssignedVars[] [2021-05-02 17:37:55,068 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.1 percent of original size [2021-05-02 17:37:55,177 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.1 percent of original size 72 [2021-05-02 17:37:55,207 INFO L1112 elerationTransformer]: Accelerated Formula: (and (= v_main_~j~0_5 (+ v_main_~j~0_6 2)) (= (+ v_main_~i~0_5 1) v_main_~i~0_4) (<= (mod v_main_~i~0_5 4294967296) (mod v_main_~n~0_5 4294967296))) InVars {main_~j~0=v_main_~j~0_6, main_~i~0=v_main_~i~0_5, main_~n~0=v_main_~n~0_5} OutVars{main_~j~0=v_main_~j~0_5, main_~i~0=v_main_~i~0_4, main_~n~0=v_main_~n~0_5, main_#t~post9=|v_main_#t~post9_1|} AuxVars[] AssignedVars[main_~j~0, main_~i~0, main_#t~post9] with Formula: (let ((.cse1 (mod v_main_~i~0_5 4294967296)) (.cse0 (mod v_main_~n~0_5 4294967296))) (or (and (= v_main_~j~0_6 v_main_~j~0_5) (< .cse0 .cse1) (= |v_main_#t~post9_3| |v_main_#t~post9_1|) (= v_itFin_1 0) (= v_main_~i~0_4 v_main_~i~0_5)) (let ((.cse2 (+ v_itFin_1 v_main_~i~0_5))) (and (<= (div (+ (* v_itFin_1 (- 1)) (* v_main_~i~0_5 (- 1)) .cse0 1) (- 4294967296)) (+ (div (+ v_main_~i~0_5 (- 4294967295)) 4294967296) 1)) (< 0 v_itFin_1) (< .cse0 (mod .cse2 4294967296)) (= .cse2 v_main_~i~0_4) (= v_main_~j~0_5 (+ (* 2 v_itFin_1) v_main_~j~0_6)) (<= .cse1 .cse0))))) InVars {main_~i~0=v_main_~i~0_5, main_~n~0=v_main_~n~0_5, main_#t~post9=|v_main_#t~post9_3|, main_~j~0=v_main_~j~0_6} OutVars{main_~i~0=v_main_~i~0_4, main_~n~0=v_main_~n~0_5, main_#t~post9=|v_main_#t~post9_1|, main_~j~0=v_main_~j~0_5} AuxVars[v_itFin_1] AssignedVars[main_~j~0, main_~i~0, main_#t~post9] [2021-05-02 17:37:55,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:37:55 BasicIcfg [2021-05-02 17:37:55,213 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 17:37:55,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:37:55,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:37:55,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:37:55,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:37:54" (1/4) ... [2021-05-02 17:37:55,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee3b64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:37:55, skipping insertion in model container [2021-05-02 17:37:55,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:54" (2/4) ... [2021-05-02 17:37:55,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee3b64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:37:55, skipping insertion in model container [2021-05-02 17:37:55,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:37:54" (3/4) ... [2021-05-02 17:37:55,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee3b64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:37:55, skipping insertion in model container [2021-05-02 17:37:55,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:37:55" (4/4) ... [2021-05-02 17:37:55,218 INFO L111 eAbstractionObserver]: Analyzing ICFG nec20.cJordan [2021-05-02 17:37:55,221 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:37:55,223 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:37:55,233 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:37:55,244 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:37:55,244 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 17:37:55,244 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 17:37:55,244 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:37:55,244 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:37:55,245 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:37:55,245 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:37:55,245 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:37:55,253 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:37:55,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 17:37:55,257 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:55,257 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:55,257 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:55,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:55,261 INFO L82 PathProgramCache]: Analyzing trace with hash 936597551, now seen corresponding path program 1 times [2021-05-02 17:37:55,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:55,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527004281] [2021-05-02 17:37:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:55,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:55,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:55,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527004281] [2021-05-02 17:37:55,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527004281] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:37:55,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:37:55,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:37:55,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551160306] [2021-05-02 17:37:55,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:37:55,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:55,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:37:55,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:37:55,400 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:55,427 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-05-02 17:37:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:37:55,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 17:37:55,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:55,432 INFO L225 Difference]: With dead ends: 25 [2021-05-02 17:37:55,433 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 17:37:55,433 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:37:55,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 17:37:55,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-02 17:37:55,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:55,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-05-02 17:37:55,451 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 15 [2021-05-02 17:37:55,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:55,452 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-05-02 17:37:55,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:55,452 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-05-02 17:37:55,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 17:37:55,452 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:55,452 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:55,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:37:55,452 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:55,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:55,453 INFO L82 PathProgramCache]: Analyzing trace with hash 965226702, now seen corresponding path program 1 times [2021-05-02 17:37:55,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:55,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441104499] [2021-05-02 17:37:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:55,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:55,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:55,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441104499] [2021-05-02 17:37:55,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441104499] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:37:55,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:37:55,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 17:37:55,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714589844] [2021-05-02 17:37:55,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 17:37:55,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:55,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 17:37:55,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 17:37:55,527 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:55,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:55,593 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-02 17:37:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 17:37:55,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 17:37:55,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:55,595 INFO L225 Difference]: With dead ends: 22 [2021-05-02 17:37:55,595 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 17:37:55,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:37:55,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 17:37:55,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2021-05-02 17:37:55,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:55,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-05-02 17:37:55,598 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2021-05-02 17:37:55,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:55,599 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-05-02 17:37:55,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:55,599 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-05-02 17:37:55,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 17:37:55,599 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:55,599 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:55,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:37:55,599 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:55,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:55,600 INFO L82 PathProgramCache]: Analyzing trace with hash -842227761, now seen corresponding path program 1 times [2021-05-02 17:37:55,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:55,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883430861] [2021-05-02 17:37:55,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:55,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:55,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:55,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883430861] [2021-05-02 17:37:55,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883430861] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:37:55,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:37:55,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 17:37:55,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876425658] [2021-05-02 17:37:55,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 17:37:55,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:55,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 17:37:55,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 17:37:55,730 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:55,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:55,850 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-05-02 17:37:55,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 17:37:55,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 17:37:55,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:55,852 INFO L225 Difference]: With dead ends: 23 [2021-05-02 17:37:55,852 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 17:37:55,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:37:55,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 17:37:55,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2021-05-02 17:37:55,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-05-02 17:37:55,858 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2021-05-02 17:37:55,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:55,858 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-05-02 17:37:55,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:55,858 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-05-02 17:37:55,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 17:37:55,859 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:55,859 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:55,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 17:37:55,859 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:55,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:55,860 INFO L82 PathProgramCache]: Analyzing trace with hash 686516073, now seen corresponding path program 1 times [2021-05-02 17:37:55,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:55,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326685892] [2021-05-02 17:37:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 17:37:55,901 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 17:37:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 17:37:55,927 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 17:37:55,947 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 17:37:55,947 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 17:37:55,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 17:37:55,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:37:55 BasicIcfg [2021-05-02 17:37:55,972 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:37:55,972 INFO L168 Benchmark]: Toolchain (without parser) took 1526.61 ms. Allocated memory is still 185.6 MB. Free memory was 149.9 MB in the beginning and 147.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 3.8 MB. Max. memory is 8.0 GB. [2021-05-02 17:37:55,973 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 185.6 MB. Free memory is still 166.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:37:55,973 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.13 ms. Allocated memory is still 185.6 MB. Free memory was 149.7 MB in the beginning and 168.7 MB in the end (delta: -18.9 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. [2021-05-02 17:37:55,973 INFO L168 Benchmark]: Boogie Preprocessor took 32.07 ms. Allocated memory is still 185.6 MB. Free memory was 168.7 MB in the beginning and 167.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 17:37:55,974 INFO L168 Benchmark]: RCFGBuilder took 289.77 ms. Allocated memory is still 185.6 MB. Free memory was 167.1 MB in the beginning and 152.8 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 17:37:55,974 INFO L168 Benchmark]: IcfgTransformer took 221.17 ms. Allocated memory is still 185.6 MB. Free memory was 152.8 MB in the beginning and 135.6 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-02 17:37:55,974 INFO L168 Benchmark]: TraceAbstraction took 758.00 ms. Allocated memory is still 185.6 MB. Free memory was 135.2 MB in the beginning and 147.2 MB in the end (delta: -12.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:37:55,976 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from IcfgTransformer: - StatisticsResult: Jordan loop acceleration statistics 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 185.6 MB. Free memory is still 166.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 220.13 ms. Allocated memory is still 185.6 MB. Free memory was 149.7 MB in the beginning and 168.7 MB in the end (delta: -18.9 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.07 ms. Allocated memory is still 185.6 MB. Free memory was 168.7 MB in the beginning and 167.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 289.77 ms. Allocated memory is still 185.6 MB. Free memory was 167.1 MB in the beginning and 152.8 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 221.17 ms. Allocated memory is still 185.6 MB. Free memory was 152.8 MB in the beginning and 135.6 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 758.00 ms. Allocated memory is still 185.6 MB. Free memory was 135.2 MB in the beginning and 147.2 MB in the end (delta: -12.0 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int b; VAL [\old(b)=1030, b=0] [L15] _Bool k=__VERIFIER_nondet_bool(); [L16] unsigned int i,n,j; [L17] int a[1025]; VAL [b=0, k=1] [L19] COND TRUE \read(k) [L20] n=0 VAL [b=0, k=1, n=0] [L25] i=0 [L26] j=__VERIFIER_nondet_uint() [L27] COND FALSE !(j > 10000) VAL [b=0, i=0, j=1023, k=1, n=0] [L30] COND TRUE i <= n [L31] i++ [L32] j= j +2 VAL [b=0, i=1, i++=1028, j=1025, k=1, n=0] [L30] COND FALSE !(i <= n) VAL [b=0, i=1, i++=1028, j=1025, k=1, n=0] [L35] a[i]=0 VAL [b=0, i=1, i++=1028, j=1025, k=1, n=0] [L36] CALL __VERIFIER_assert(j<1025) VAL [\old(cond)=0, b=0] [L7] COND TRUE !(cond) VAL [\old(cond)=0, b=0, cond=0] [L8] reach_error() VAL [\old(cond)=0, b=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 705.2ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 7.5ms, AutomataDifference: 234.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 58 SDtfs, 53 SDslu, 25 SDs, 0 SdLazy, 58 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 64.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 197.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 17.8ms AutomataMinimizationTime, 3 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 10.3ms SsaConstructionTime, 78.1ms SatisfiabilityAnalysisTime, 211.3ms InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 191 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...