/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-invgen/up.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:09:21,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:09:21,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:09:21,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:09:21,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:09:21,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:09:21,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:09:21,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:09:21,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:09:21,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:09:21,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:09:21,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 18:09:21,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 18:09:21,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 18:09:21,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 18:09:21,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 18:09:21,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 18:09:21,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 18:09:21,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 18:09:21,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 18:09:21,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 18:09:21,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 18:09:21,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 18:09:21,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 18:09:21,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 18:09:21,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:09:21,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:09:21,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:09:21,539 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:09:21,555 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:09:21,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:09:21,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:09:21,558 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:09:21,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:09:21,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:09:21,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:09:21,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:09:21,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:09:21,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:09:21,560 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:09:21,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:09:21,560 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:09:21,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:09:21,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:09:21,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:09:21,561 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:09:21,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:09:21,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:09:21,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:09:21,561 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:09:21,562 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:09:21,562 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:09:21,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:09:21,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:09:21,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:09:21,872 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:09:21,873 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:09:21,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/up.i [2021-05-02 18:09:21,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1d800741/74545127a41746069319e99936446070/FLAGf4e37f5fd [2021-05-02 18:09:22,325 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:09:22,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/up.i [2021-05-02 18:09:22,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1d800741/74545127a41746069319e99936446070/FLAGf4e37f5fd [2021-05-02 18:09:22,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1d800741/74545127a41746069319e99936446070 [2021-05-02 18:09:22,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:09:22,729 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:09:22,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:09:22,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:09:22,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:09:22,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:09:22" (1/1) ... [2021-05-02 18:09:22,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b5163f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:22, skipping insertion in model container [2021-05-02 18:09:22,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:09:22" (1/1) ... [2021-05-02 18:09:22,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:09:22,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:09:22,863 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-invgen/up.i[893,906] [2021-05-02 18:09:22,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:09:22,879 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:09:22,927 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-invgen/up.i[893,906] [2021-05-02 18:09:22,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:09:22,950 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:09:22,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:22 WrapperNode [2021-05-02 18:09:22,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:09:22,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:09:22,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:09:22,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:09:22,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:22" (1/1) ... [2021-05-02 18:09:22,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:22" (1/1) ... [2021-05-02 18:09:22,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:22" (1/1) ... [2021-05-02 18:09:22,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:22" (1/1) ... [2021-05-02 18:09:22,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:22" (1/1) ... [2021-05-02 18:09:22,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:22" (1/1) ... [2021-05-02 18:09:22,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:22" (1/1) ... [2021-05-02 18:09:22,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:09:22,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:09:22,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:09:22,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:09:22,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:22" (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 18:09:23,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:09:23,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:09:23,073 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:09:23,073 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:09:23,073 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:09:23,074 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:09:23,074 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:09:23,074 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:09:23,074 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 18:09:23,075 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 18:09:23,075 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:09:23,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:09:23,075 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:09:23,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:09:23,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 18:09:23,076 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:09:23,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:09:23,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:09:23,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:09:23,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:09:23,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:09:23,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:09:23,390 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:09:23,390 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 18:09:23,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:09:23 BoogieIcfgContainer [2021-05-02 18:09:23,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:09:23,392 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:09:23,392 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:09:23,393 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:09:23,395 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:09:23" (1/1) ... [2021-05-02 18:09:23,458 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3 v_main_~n~0_4) InVars {main_~i~0=v_main_~i~0_3, main_~n~0=v_main_~n~0_4} OutVars{main_~i~0=v_main_~i~0_3, main_~n~0=v_main_~n~0_4} AuxVars[] AssignedVars[] [2021-05-02 18:09:23,500 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.1 percent of original size [2021-05-02 18:09:23,664 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.1 percent of original size 57 [2021-05-02 18:09:23,726 INFO L1112 elerationTransformer]: Accelerated Formula: (and (= v_main_~i~0_2 (+ v_main_~i~0_3 1)) (= (+ v_main_~k~0_5 1) v_main_~k~0_4) (< v_main_~i~0_3 v_main_~n~0_4)) InVars {main_~k~0=v_main_~k~0_5, main_~i~0=v_main_~i~0_3, main_~n~0=v_main_~n~0_4} OutVars{main_~k~0=v_main_~k~0_4, main_#t~post4=|v_main_#t~post4_1|, main_~i~0=v_main_~i~0_2, main_#t~post5=|v_main_#t~post5_1|, main_~n~0=v_main_~n~0_4} AuxVars[] AssignedVars[main_~k~0, main_#t~post4, main_~i~0, main_#t~post5] with Formula: (or (and (= v_main_~k~0_5 v_main_~k~0_4) (= v_itFin_1 0) (= v_main_~i~0_3 v_main_~i~0_2) (<= v_main_~n~0_4 v_main_~i~0_3) (= |v_main_#t~post4_3| |v_main_#t~post4_1|) (= |v_main_#t~post5_3| |v_main_#t~post5_1|)) (let ((.cse0 (+ v_itFin_1 v_main_~i~0_3))) (and (= v_main_~i~0_2 .cse0) (= v_main_~k~0_4 (+ v_itFin_1 v_main_~k~0_5)) (< .cse0 (+ v_main_~n~0_4 1)) (<= v_main_~n~0_4 .cse0) (< v_main_~i~0_3 v_main_~n~0_4)))) InVars {main_~i~0=v_main_~i~0_3, main_#t~post4=|v_main_#t~post4_3|, main_#t~post5=|v_main_#t~post5_3|, main_~n~0=v_main_~n~0_4, main_~k~0=v_main_~k~0_5} OutVars{main_#t~post4=|v_main_#t~post4_1|, main_~i~0=v_main_~i~0_2, main_#t~post5=|v_main_#t~post5_1|, main_~n~0=v_main_~n~0_4, main_~k~0=v_main_~k~0_4} AuxVars[v_itFin_1] AssignedVars[main_~k~0, main_#t~post4, main_~i~0, main_#t~post5] [2021-05-02 18:09:23,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:09:23 BasicIcfg [2021-05-02 18:09:23,740 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:09:23,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:09:23,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:09:23,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:09:23,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:09:22" (1/4) ... [2021-05-02 18:09:23,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b1e4750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:09:23, skipping insertion in model container [2021-05-02 18:09:23,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:22" (2/4) ... [2021-05-02 18:09:23,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b1e4750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:09:23, skipping insertion in model container [2021-05-02 18:09:23,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:09:23" (3/4) ... [2021-05-02 18:09:23,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b1e4750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:09:23, skipping insertion in model container [2021-05-02 18:09:23,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:09:23" (4/4) ... [2021-05-02 18:09:23,750 INFO L111 eAbstractionObserver]: Analyzing ICFG up.iJordan [2021-05-02 18:09:23,755 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:09:23,759 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:09:23,774 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:09:23,802 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:09:23,802 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:09:23,802 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:09:23,803 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:09:23,803 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:09:23,803 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:09:23,803 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:09:23,803 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:09:23,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 18:09:23,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 18:09:23,827 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:23,827 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:09:23,827 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:23,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:23,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1244271256, now seen corresponding path program 1 times [2021-05-02 18:09:23,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:23,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253159270] [2021-05-02 18:09:23,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:23,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:23,971 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 18:09:23,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:23,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253159270] [2021-05-02 18:09:23,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253159270] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:09:23,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:09:23,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 18:09:23,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254773549] [2021-05-02 18:09:23,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 18:09:23,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:23,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 18:09:23,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:09:23,990 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 18:09:24,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:24,034 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-05-02 18:09:24,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 18:09:24,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 13 [2021-05-02 18:09:24,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:24,041 INFO L225 Difference]: With dead ends: 21 [2021-05-02 18:09:24,041 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 18:09:24,042 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:09:24,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 18:09:24,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 18:09:24,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:09:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-05-02 18:09:24,067 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-05-02 18:09:24,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:24,068 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-05-02 18:09:24,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 18:09:24,069 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-05-02 18:09:24,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 18:09:24,069 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:24,069 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:09:24,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:09:24,070 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:24,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:24,070 INFO L82 PathProgramCache]: Analyzing trace with hash 2131774937, now seen corresponding path program 1 times [2021-05-02 18:09:24,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:24,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399766244] [2021-05-02 18:09:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:24,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:24,152 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 18:09:24,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:24,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399766244] [2021-05-02 18:09:24,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399766244] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:09:24,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:09:24,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 18:09:24,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906664075] [2021-05-02 18:09:24,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:09:24,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:24,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:09:24,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 18:09:24,155 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 18:09:24,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:24,251 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-05-02 18:09:24,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 18:09:24,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 13 [2021-05-02 18:09:24,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:24,252 INFO L225 Difference]: With dead ends: 20 [2021-05-02 18:09:24,252 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 18:09:24,253 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-02 18:09:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 18:09:24,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-02 18:09:24,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:09:24,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-05-02 18:09:24,256 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2021-05-02 18:09:24,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:24,257 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-05-02 18:09:24,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 18:09:24,257 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-05-02 18:09:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 18:09:24,257 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:24,257 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:09:24,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 18:09:24,258 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:24,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:24,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1540521565, now seen corresponding path program 1 times [2021-05-02 18:09:24,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:24,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979070805] [2021-05-02 18:09:24,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:24,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:24,363 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 18:09:24,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:24,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979070805] [2021-05-02 18:09:24,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979070805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:24,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715681567] [2021-05-02 18:09:24,364 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 18:09:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:24,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 18:09:24,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:09:24,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:24,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:24,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:24,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:24,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:24,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:24,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:24,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:24,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:24,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:24,682 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 18:09:24,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715681567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:24,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:09:24,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-05-02 18:09:24,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437824696] [2021-05-02 18:09:24,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 18:09:24,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:24,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 18:09:24,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:09:24,687 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 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 18:09:24,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:24,997 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-05-02 18:09:24,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 18:09:24,998 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 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 14 [2021-05-02 18:09:24,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:24,998 INFO L225 Difference]: With dead ends: 25 [2021-05-02 18:09:24,998 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 18:09:24,999 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 347.9ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-05-02 18:09:24,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 18:09:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-02 18:09:25,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:09:25,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-05-02 18:09:25,009 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2021-05-02 18:09:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:25,009 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-05-02 18:09:25,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 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 18:09:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-05-02 18:09:25,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 18:09:25,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:25,010 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:09:25,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 18:09:25,234 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:25,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:25,234 INFO L82 PathProgramCache]: Analyzing trace with hash 812776477, now seen corresponding path program 1 times [2021-05-02 18:09:25,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:25,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612895875] [2021-05-02 18:09:25,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:25,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:25,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 18:09:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:09:25,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:25,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612895875] [2021-05-02 18:09:25,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612895875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:25,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113272969] [2021-05-02 18:09:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:09:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:25,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 18:09:25,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:09:25,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:09:25,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113272969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:25,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:09:25,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-05-02 18:09:25,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401679472] [2021-05-02 18:09:25,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 18:09:25,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:25,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 18:09:25,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 18:09:25,878 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:09:26,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:26,491 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-02 18:09:26,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 18:09:26,491 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 21 [2021-05-02 18:09:26,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:26,492 INFO L225 Difference]: With dead ends: 26 [2021-05-02 18:09:26,492 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 18:09:26,492 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 667.3ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-05-02 18:09:26,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 18:09:26,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 18:09:26,493 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 18:09:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 18:09:26,493 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-05-02 18:09:26,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:26,493 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 18:09:26,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:09:26,494 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 18:09:26,494 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 18:09:26,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:09:26,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:09:26 BasicIcfg [2021-05-02 18:09:26,698 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 18:09:26,699 INFO L168 Benchmark]: Toolchain (without parser) took 3969.83 ms. Allocated memory was 177.2 MB in the beginning and 212.9 MB in the end (delta: 35.7 MB). Free memory was 141.4 MB in the beginning and 182.0 MB in the end (delta: -40.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 18:09:26,699 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 177.2 MB. Free memory is still 157.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 18:09:26,699 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.29 ms. Allocated memory is still 177.2 MB. Free memory was 141.2 MB in the beginning and 160.1 MB in the end (delta: -18.9 MB). Peak memory consumption was 7.8 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:26,699 INFO L168 Benchmark]: Boogie Preprocessor took 36.24 ms. Allocated memory is still 177.2 MB. Free memory was 160.1 MB in the beginning and 158.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:26,699 INFO L168 Benchmark]: RCFGBuilder took 402.84 ms. Allocated memory is still 177.2 MB. Free memory was 158.6 MB in the beginning and 144.3 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:26,700 INFO L168 Benchmark]: IcfgTransformer took 348.42 ms. Allocated memory is still 177.2 MB. Free memory was 144.3 MB in the beginning and 128.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:26,700 INFO L168 Benchmark]: TraceAbstraction took 2955.89 ms. Allocated memory was 177.2 MB in the beginning and 212.9 MB in the end (delta: 35.7 MB). Free memory was 128.2 MB in the beginning and 182.0 MB in the end (delta: -53.8 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 18:09:26,700 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from IcfgTransformer: - StatisticsResult: Jordan loop acceleration statistics 2 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 0.14 ms. Allocated memory is still 177.2 MB. Free memory is still 157.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 220.29 ms. Allocated memory is still 177.2 MB. Free memory was 141.2 MB in the beginning and 160.1 MB in the end (delta: -18.9 MB). Peak memory consumption was 7.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.24 ms. Allocated memory is still 177.2 MB. Free memory was 160.1 MB in the beginning and 158.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 402.84 ms. Allocated memory is still 177.2 MB. Free memory was 158.6 MB in the beginning and 144.3 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 348.42 ms. Allocated memory is still 177.2 MB. Free memory was 144.3 MB in the beginning and 128.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2955.89 ms. Allocated memory was 177.2 MB in the beginning and 212.9 MB in the end (delta: 35.7 MB). Free memory was 128.2 MB in the beginning and 182.0 MB in the end (delta: -53.8 MB). There was no memory consumed. 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, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2895.5ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 16.7ms, AutomataDifference: 1093.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 52 SDtfs, 81 SDslu, 97 SDs, 0 SdLazy, 264 SolverSat, 46 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 253.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1131.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 26.3ms AutomataMinimizationTime, 4 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 25.3ms SsaConstructionTime, 96.5ms SatisfiabilityAnalysisTime, 1053.4ms InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 462 SizeOfPredicates, 13 NumberOfNonLiveVariables, 176 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 3/12 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...