/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/loop-lit/cggmp2005.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:09:43,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:09:43,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:09:43,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:09:43,821 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:09:43,824 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:09:43,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:09:43,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:09:43,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:09:43,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:09:43,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:09:43,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 18:09:43,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 18:09:43,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 18:09:43,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 18:09:43,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 18:09:43,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 18:09:43,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 18:09:43,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 18:09:43,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 18:09:43,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 18:09:43,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 18:09:43,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 18:09:43,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 18:09:43,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 18:09:43,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:09:43,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:09:43,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:09:43,893 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:09:43,909 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:09:43,909 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:09:43,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:09:43,912 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:09:43,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:09:43,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:09:43,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:09:43,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:09:43,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:09:43,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:09:43,914 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:09:43,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:09:43,914 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:09:43,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:09:43,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:09:43,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:09:43,915 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:09:43,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:09:43,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:09:43,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:09:43,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:09:43,917 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:09:43,917 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:09:44,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:09:44,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:09:44,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:09:44,273 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:09:44,274 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:09:44,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005.i [2021-05-02 18:09:44,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3255222c/7d877dc548024d3eb147e05786e144d6/FLAGda2ccfe1b [2021-05-02 18:09:44,779 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:09:44,779 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005.i [2021-05-02 18:09:44,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3255222c/7d877dc548024d3eb147e05786e144d6/FLAGda2ccfe1b [2021-05-02 18:09:44,803 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3255222c/7d877dc548024d3eb147e05786e144d6 [2021-05-02 18:09:44,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:09:44,807 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:09:44,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:09:44,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:09:44,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:09:44,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:09:44" (1/1) ... [2021-05-02 18:09:44,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@409b49b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:44, skipping insertion in model container [2021-05-02 18:09:44,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:09:44" (1/1) ... [2021-05-02 18:09:44,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:09:44,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:09:44,985 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005.i[895,908] [2021-05-02 18:09:44,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:09:45,002 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:09:45,014 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005.i[895,908] [2021-05-02 18:09:45,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:09:45,034 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:09:45,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:45 WrapperNode [2021-05-02 18:09:45,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:09:45,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:09:45,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:09:45,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:09:45,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:45" (1/1) ... [2021-05-02 18:09:45,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:45" (1/1) ... [2021-05-02 18:09:45,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:45" (1/1) ... [2021-05-02 18:09:45,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:45" (1/1) ... [2021-05-02 18:09:45,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:45" (1/1) ... [2021-05-02 18:09:45,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:45" (1/1) ... [2021-05-02 18:09:45,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:45" (1/1) ... [2021-05-02 18:09:45,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:09:45,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:09:45,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:09:45,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:09:45,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:45" (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 18:09:45,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:09:45,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:09:45,186 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:09:45,187 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:09:45,187 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:09:45,187 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:09:45,187 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:09:45,187 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:09:45,188 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 18:09:45,188 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 18:09:45,188 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:09:45,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:09:45,188 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:09:45,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:09:45,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 18:09:45,189 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:09:45,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:09:45,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:09:45,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:09:45,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:09:45,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:09:45,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:09:45,408 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:09:45,408 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 18:09:45,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:09:45 BoogieIcfgContainer [2021-05-02 18:09:45,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:09:45,410 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:09:45,410 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:09:45,411 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:09:45,413 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:09:45" (1/1) ... [2021-05-02 18:09:45,499 INFO L181 rdanLoopAcceleration]: Guard: Formula: (<= v_main_~i~0_3 v_main_~j~0_3) InVars {main_~i~0=v_main_~i~0_3, main_~j~0=v_main_~j~0_3} OutVars{main_~i~0=v_main_~i~0_3, main_~j~0=v_main_~j~0_3} AuxVars[] AssignedVars[] [2021-05-02 18:09:45,520 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 90.5 percent of original size [2021-05-02 18:09:45,592 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 90.5 percent of original size 57 [2021-05-02 18:09:45,626 INFO L1112 elerationTransformer]: Accelerated Formula: (and (<= v_main_~i~0_3 v_main_~j~0_3) (= v_main_~i~0_2 (+ v_main_~i~0_3 2)) (= v_main_~j~0_2 (+ v_main_~j~0_3 (- 1)))) InVars {main_~j~0=v_main_~j~0_3, main_~i~0=v_main_~i~0_3} OutVars{main_~j~0=v_main_~j~0_2, main_~i~0=v_main_~i~0_2} AuxVars[] AssignedVars[main_~j~0, main_~i~0] with Formula: (or (and (= v_itFin_1 0) (< v_main_~j~0_3 v_main_~i~0_3) (= v_main_~i~0_3 v_main_~i~0_2) (= v_main_~j~0_3 v_main_~j~0_2)) (and (<= v_main_~i~0_3 v_main_~j~0_3) (= v_main_~i~0_2 (+ (* 2 v_itFin_1) v_main_~i~0_3)) (< v_main_~j~0_3 (+ (* 3 v_itFin_1) v_main_~i~0_3)) (= v_main_~j~0_3 (+ v_itFin_1 v_main_~j~0_2)) (<= v_itFin_1 (+ (div (+ v_main_~j~0_3 (* v_main_~i~0_3 (- 1))) 3) 1)))) InVars {main_~i~0=v_main_~i~0_3, main_~j~0=v_main_~j~0_3} OutVars{main_~i~0=v_main_~i~0_2, main_~j~0=v_main_~j~0_2} AuxVars[v_itFin_1] AssignedVars[main_~j~0, main_~i~0] [2021-05-02 18:09:45,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:09:45 BasicIcfg [2021-05-02 18:09:45,634 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:09:45,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:09:45,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:09:45,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:09:45,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:09:44" (1/4) ... [2021-05-02 18:09:45,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3174767f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:09:45, skipping insertion in model container [2021-05-02 18:09:45,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:45" (2/4) ... [2021-05-02 18:09:45,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3174767f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:09:45, skipping insertion in model container [2021-05-02 18:09:45,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:09:45" (3/4) ... [2021-05-02 18:09:45,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3174767f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:09:45, skipping insertion in model container [2021-05-02 18:09:45,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:09:45" (4/4) ... [2021-05-02 18:09:45,654 INFO L111 eAbstractionObserver]: Analyzing ICFG cggmp2005.iJordan [2021-05-02 18:09:45,658 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:09:45,663 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:09:45,678 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:09:45,697 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:09:45,697 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:09:45,697 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:09:45,697 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:09:45,697 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:09:45,697 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:09:45,697 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:09:45,697 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:09:45,708 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 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 18:09:45,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 18:09:45,714 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:45,715 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:09:45,715 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:45,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:45,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1257757292, now seen corresponding path program 1 times [2021-05-02 18:09:45,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:45,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060073080] [2021-05-02 18:09:45,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:45,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:45,876 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 18:09:45,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:45,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060073080] [2021-05-02 18:09:45,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060073080] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:09:45,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:09:45,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 18:09:45,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011971933] [2021-05-02 18:09:45,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 18:09:45,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:45,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 18:09:45,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:09:45,895 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 18:09:45,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:45,927 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-05-02 18:09:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 18:09:45,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2021-05-02 18:09:45,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:45,934 INFO L225 Difference]: With dead ends: 19 [2021-05-02 18:09:45,934 INFO L226 Difference]: Without dead ends: 12 [2021-05-02 18:09:45,935 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:09:45,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-05-02 18:09:45,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-05-02 18:09:45,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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 18:09:45,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-05-02 18:09:45,958 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 11 [2021-05-02 18:09:45,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:45,959 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-05-02 18:09:45,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 18:09:45,959 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-05-02 18:09:45,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 18:09:45,959 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:45,960 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:09:45,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:09:45,960 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:45,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:45,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1258680813, now seen corresponding path program 1 times [2021-05-02 18:09:45,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:45,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85638210] [2021-05-02 18:09:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:46,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:46,080 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 18:09:46,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:46,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85638210] [2021-05-02 18:09:46,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85638210] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:09:46,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:09:46,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 18:09:46,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625790838] [2021-05-02 18:09:46,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 18:09:46,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:46,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 18:09:46,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 18:09:46,088 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 18:09:46,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:46,131 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-05-02 18:09:46,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 18:09:46,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2021-05-02 18:09:46,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:46,132 INFO L225 Difference]: With dead ends: 13 [2021-05-02 18:09:46,132 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 18:09:46,133 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 18:09:46,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 18:09:46,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-02 18:09:46,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 18:09:46,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-02 18:09:46,135 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-05-02 18:09:46,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:46,136 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-02 18:09:46,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 18:09:46,136 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-02 18:09:46,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 18:09:46,137 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:46,137 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:09:46,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 18:09:46,137 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:46,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:46,138 INFO L82 PathProgramCache]: Analyzing trace with hash 391120150, now seen corresponding path program 1 times [2021-05-02 18:09:46,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:46,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653353502] [2021-05-02 18:09:46,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:46,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:09:46,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:46,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653353502] [2021-05-02 18:09:46,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653353502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:46,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727847796] [2021-05-02 18:09:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:09:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:46,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 18:09:46,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:09:46,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:46,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:46,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:46,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:46,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:09:46,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727847796] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:46,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:09:46,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-05-02 18:09:46,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185579777] [2021-05-02 18:09:46,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 18:09:46,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:46,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 18:09:46,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 18:09:46,497 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:09:46,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:46,629 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-05-02 18:09:46,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 18:09:46,630 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 18:09:46,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:46,630 INFO L225 Difference]: With dead ends: 17 [2021-05-02 18:09:46,630 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 18:09:46,633 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-02 18:09:46,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 18:09:46,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 18:09:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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 18:09:46,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 18:09:46,638 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 18:09:46,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:46,638 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 18:09:46,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:09:46,639 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 18:09:46,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 18:09:46,640 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:46,640 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:09:46,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 18:09:46,861 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:46,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:46,861 INFO L82 PathProgramCache]: Analyzing trace with hash -733456627, now seen corresponding path program 2 times [2021-05-02 18:09:46,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:46,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145640623] [2021-05-02 18:09:46,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:46,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:09:46,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:46,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145640623] [2021-05-02 18:09:46,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145640623] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:46,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479344822] [2021-05-02 18:09:46,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:09:47,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:09:47,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:09:47,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 18:09:47,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:09:47,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:47,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:47,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:47,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:47,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:47,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:47,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 18:09:47,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479344822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:47,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:09:47,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-05-02 18:09:47,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589942432] [2021-05-02 18:09:47,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 18:09:47,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:47,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 18:09:47,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-02 18:09:47,278 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:09:47,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:47,420 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2021-05-02 18:09:47,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 18:09:47,420 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 18:09:47,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:47,421 INFO L225 Difference]: With dead ends: 12 [2021-05-02 18:09:47,421 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 18:09:47,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 221.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-02 18:09:47,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 18:09:47,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 18:09:47,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 18:09:47,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 18:09:47,422 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-05-02 18:09:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:47,423 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 18:09:47,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:09:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 18:09:47,423 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 18:09:47,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:09:47,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:09:47 BasicIcfg [2021-05-02 18:09:47,652 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 18:09:47,652 INFO L168 Benchmark]: Toolchain (without parser) took 2845.16 ms. Allocated memory was 190.8 MB in the beginning and 229.6 MB in the end (delta: 38.8 MB). Free memory was 155.9 MB in the beginning and 135.4 MB in the end (delta: 20.5 MB). Peak memory consumption was 59.3 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:47,652 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 190.8 MB. Free memory is still 172.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 18:09:47,653 INFO L168 Benchmark]: CACSL2BoogieTranslator took 223.55 ms. Allocated memory is still 190.8 MB. Free memory was 155.6 MB in the beginning and 146.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:47,653 INFO L168 Benchmark]: Boogie Preprocessor took 63.57 ms. Allocated memory is still 190.8 MB. Free memory was 146.1 MB in the beginning and 174.3 MB in the end (delta: -28.1 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:47,653 INFO L168 Benchmark]: RCFGBuilder took 307.60 ms. Allocated memory is still 190.8 MB. Free memory was 174.3 MB in the beginning and 160.6 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:47,653 INFO L168 Benchmark]: IcfgTransformer took 224.12 ms. Allocated memory is still 190.8 MB. Free memory was 160.6 MB in the beginning and 147.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:47,654 INFO L168 Benchmark]: TraceAbstraction took 2015.90 ms. Allocated memory was 190.8 MB in the beginning and 229.6 MB in the end (delta: 38.8 MB). Free memory was 147.4 MB in the beginning and 135.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 51.9 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:47,654 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from IcfgTransformer: - StatisticsResult: Jordan loop acceleration statistics 0 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 0.12 ms. Allocated memory is still 190.8 MB. Free memory is still 172.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 223.55 ms. Allocated memory is still 190.8 MB. Free memory was 155.6 MB in the beginning and 146.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 63.57 ms. Allocated memory is still 190.8 MB. Free memory was 146.1 MB in the beginning and 174.3 MB in the end (delta: -28.1 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 307.60 ms. Allocated memory is still 190.8 MB. Free memory was 174.3 MB in the beginning and 160.6 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 224.12 ms. Allocated memory is still 190.8 MB. Free memory was 160.6 MB in the beginning and 147.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2015.90 ms. Allocated memory was 190.8 MB in the beginning and 229.6 MB in the end (delta: 38.8 MB). Free memory was 147.4 MB in the beginning and 135.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 51.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1954.9ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 11.4ms, AutomataDifference: 381.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 40 SDtfs, 31 SDslu, 71 SDs, 0 SdLazy, 95 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 86.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 476.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 19.0ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 33.5ms SsaConstructionTime, 116.3ms SatisfiabilityAnalysisTime, 768.1ms InterpolantComputationTime, 72 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 405 SizeOfPredicates, 4 NumberOfNonLiveVariables, 149 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 1/8 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...