/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 04:02:49,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 04:02:49,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 04:02:49,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-01 04:02:49,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-01 04:02:49,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-01 04:02:49,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-01 04:02:49,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-01 04:02:49,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-01 04:02:49,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-01 04:02:49,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-01 04:02:49,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-01 04:02:49,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 04:02:49,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 04:02:49,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 04:02:49,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 04:02:49,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 04:02:49,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 04:02:49,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 04:02:49,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 04:02:49,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 04:02:49,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 04:02:49,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 04:02:49,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 04:02:49,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-01 04:02:49,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-01 04:02:49,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-01 04:02:49,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-01 04:02:49,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-01 04:02:49,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-01 04:02:49,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-01 04:02:49,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-01 04:02:49,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-01 04:02:49,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-01 04:02:49,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-01 04:02:49,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-01 04:02:49,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-01 04:02:49,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-01 04:02:49,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 04:02:49,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 04:02:49,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 04:02:49,703 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-01 04:02:49,715 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 04:02:49,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 04:02:49,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 04:02:49,718 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 04:02:49,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 04:02:49,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 04:02:49,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 04:02:49,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 04:02:49,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 04:02:49,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 04:02:49,719 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 04:02:49,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 04:02:49,720 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 04:02:49,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 04:02:49,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 04:02:49,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 04:02:49,720 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 04:02:49,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 04:02:49,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 04:02:49,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 04:02:49,721 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-01 04:02:49,721 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-01 04:02:49,721 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 04:02:49,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 04:02:49,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 04:02:49,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 04:02:50,000 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 04:02:50,001 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 04:02:50,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2021-05-01 04:02:50,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b996abc4b/c38ead55808d4c3b993c113256393cb2/FLAGfebf00146 [2021-05-01 04:02:50,408 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 04:02:50,408 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2021-05-01 04:02:50,413 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b996abc4b/c38ead55808d4c3b993c113256393cb2/FLAGfebf00146 [2021-05-01 04:02:50,815 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b996abc4b/c38ead55808d4c3b993c113256393cb2 [2021-05-01 04:02:50,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 04:02:50,818 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-01 04:02:50,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 04:02:50,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 04:02:50,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 04:02:50,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 04:02:50" (1/1) ... [2021-05-01 04:02:50,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e27e8b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:02:50, skipping insertion in model container [2021-05-01 04:02:50,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 04:02:50" (1/1) ... [2021-05-01 04:02:50,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 04:02:50,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 04:02:50,909 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-2.c[321,334] [2021-05-01 04:02:50,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 04:02:50,921 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 04:02:50,928 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-2.c[321,334] [2021-05-01 04:02:50,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 04:02:50,939 INFO L208 MainTranslator]: Completed translation [2021-05-01 04:02:50,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:02:50 WrapperNode [2021-05-01 04:02:50,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 04:02:50,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 04:02:50,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 04:02:50,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 04:02:50,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:02:50" (1/1) ... [2021-05-01 04:02:50,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:02:50" (1/1) ... [2021-05-01 04:02:50,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:02:50" (1/1) ... [2021-05-01 04:02:50,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:02:50" (1/1) ... [2021-05-01 04:02:50,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:02:50" (1/1) ... [2021-05-01 04:02:50,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:02:50" (1/1) ... [2021-05-01 04:02:50,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:02:50" (1/1) ... [2021-05-01 04:02:50,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 04:02:50,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 04:02:50,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 04:02:50,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 04:02:50,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:02:50" (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 [2021-05-01 04:02:51,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 04:02:51,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 04:02:51,052 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 04:02:51,052 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 04:02:51,052 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 04:02:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 04:02:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 04:02:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 04:02:51,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 04:02:51,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 04:02:51,053 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 04:02:51,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 04:02:51,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 04:02:51,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 04:02:51,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 04:02:51,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 04:02:51,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 04:02:51,255 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 04:02:51,255 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-01 04:02:51,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 04:02:51 BoogieIcfgContainer [2021-05-01 04:02:51,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 04:02:51,257 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-01 04:02:51,257 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-01 04:02:51,257 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-01 04:02:51,259 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 04:02:51" (1/1) ... [2021-05-01 04:02:51,282 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:51,303 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 04:02:51,304 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_3 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_3} OutVars{main_~z~0=v_main_~z~0_3} AuxVars[] AssignedVars[] [2021-05-01 04:02:51,315 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.1 percent of original size [2021-05-01 04:02:51,339 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:51,361 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:51,383 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-05-01 04:02:51,389 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:51,394 INFO L108 tifierPushTermWalker]: treesize reduction 14, result has 6.7 percent of original size [2021-05-01 04:02:51,399 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:51,402 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:51,406 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:51,408 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:51,411 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:51,414 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:51,417 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.1 percent of original size 54 [2021-05-01 04:02:51,468 INFO L1111 elerationTransformer]: Accelerated Formula: (and (< (mod v_main_~z~0_3 4294967296) 268435455) (= (+ v_main_~z~0_3 1) v_main_~z~0_2)) InVars {main_~z~0=v_main_~z~0_3} OutVars{main_~z~0=v_main_~z~0_2, main_#t~post7=|v_main_#t~post7_1|} AuxVars[] AssignedVars[main_~z~0, main_#t~post7] with Formula: (let ((.cse1 (mod v_main_~z~0_3 4294967296))) (or (let ((.cse0 (+ v_itFin_1 v_main_~z~0_3))) (and (<= 268435455 (mod .cse0 4294967296)) (< 0 v_itFin_1) (< .cse1 268435455) (= v_main_~z~0_2 .cse0) (<= (div (+ (* v_itFin_1 (- 1)) (* v_main_~z~0_3 (- 1)) 268435455) (- 4294967296)) (+ (div (+ v_main_~z~0_3 (- 4294967295)) 4294967296) 1)))) (and (= |v_main_#t~post7_3| |v_main_#t~post7_1|) (= v_itFin_1 0) (= v_main_~z~0_3 v_main_~z~0_2) (<= 268435455 .cse1)))) InVars {main_~z~0=v_main_~z~0_3, main_#t~post7=|v_main_#t~post7_3|} OutVars{main_~z~0=v_main_~z~0_2, main_#t~post7=|v_main_#t~post7_1|} AuxVars[v_itFin_1] AssignedVars[main_~z~0, main_#t~post7] [2021-05-01 04:02:51,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 01.05 04:02:51 BasicIcfg [2021-05-01 04:02:51,473 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-01 04:02:51,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 04:02:51,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 04:02:51,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 04:02:51,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 04:02:50" (1/4) ... [2021-05-01 04:02:51,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7cdb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 04:02:51, skipping insertion in model container [2021-05-01 04:02:51,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:02:50" (2/4) ... [2021-05-01 04:02:51,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7cdb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 04:02:51, skipping insertion in model container [2021-05-01 04:02:51,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 04:02:51" (3/4) ... [2021-05-01 04:02:51,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7cdb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 04:02:51, skipping insertion in model container [2021-05-01 04:02:51,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 01.05 04:02:51" (4/4) ... [2021-05-01 04:02:51,478 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-2.cJordan [2021-05-01 04:02:51,481 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-01 04:02:51,484 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 04:02:51,493 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 04:02:51,515 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 04:02:51,516 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-01 04:02:51,516 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-01 04:02:51,516 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 04:02:51,516 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 04:02:51,516 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 04:02:51,516 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 04:02:51,516 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 04:02:51,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-01 04:02:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-01 04:02:51,529 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 04:02:51,530 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 04:02:51,530 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 04:02:51,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 04:02:51,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1301415802, now seen corresponding path program 1 times [2021-05-01 04:02:51,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 04:02:51,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600278066] [2021-05-01 04:02:51,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 04:02:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 04:02:51,669 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:51,670 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 04:02:51,671 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:51,673 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 04:02:51,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 04:02:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 04:02:51,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:51,714 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 04:02:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 04:02:51,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 04:02:51,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600278066] [2021-05-01 04:02:51,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600278066] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 04:02:51,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 04:02:51,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 04:02:51,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622039937] [2021-05-01 04:02:51,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 04:02:51,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 04:02:51,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 04:02:51,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 04:02:51,731 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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) [2021-05-01 04:02:51,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 04:02:51,791 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-05-01 04:02:51,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 04:02:51,800 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 [2021-05-01 04:02:51,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 04:02:51,804 INFO L225 Difference]: With dead ends: 25 [2021-05-01 04:02:51,805 INFO L226 Difference]: Without dead ends: 20 [2021-05-01 04:02:51,805 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 04:02:51,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-01 04:02:51,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-01 04:02:51,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 04:02:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-05-01 04:02:51,826 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2021-05-01 04:02:51,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 04:02:51,826 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-05-01 04:02:51,826 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) [2021-05-01 04:02:51,827 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-05-01 04:02:51,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-01 04:02:51,827 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 04:02:51,827 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 04:02:51,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 04:02:51,828 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 04:02:51,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 04:02:51,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1302339323, now seen corresponding path program 1 times [2021-05-01 04:02:51,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 04:02:51,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375822824] [2021-05-01 04:02:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 04:02:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 04:02:51,865 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:51,865 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 04:02:51,868 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:51,869 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 04:02:51,880 INFO L142 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-05-01 04:02:51,882 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-01 04:02:51,886 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:51,886 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 04:02:51,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 04:02:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 04:02:51,914 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:51,915 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 04:02:51,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 04:02:51,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 04:02:51,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375822824] [2021-05-01 04:02:51,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375822824] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 04:02:51,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 04:02:51,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-01 04:02:51,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575920031] [2021-05-01 04:02:51,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-01 04:02:51,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 04:02:51,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-01 04:02:51,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-01 04:02:51,917 INFO L87 Difference]: Start difference. First operand 20 states and 24 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) [2021-05-01 04:02:52,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 04:02:52,004 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2021-05-01 04:02:52,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-01 04:02:52,005 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 [2021-05-01 04:02:52,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 04:02:52,006 INFO L225 Difference]: With dead ends: 27 [2021-05-01 04:02:52,006 INFO L226 Difference]: Without dead ends: 27 [2021-05-01 04:02:52,007 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-01 04:02:52,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-01 04:02:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-05-01 04:02:52,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 04:02:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-05-01 04:02:52,017 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2021-05-01 04:02:52,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 04:02:52,017 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-05-01 04:02:52,017 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) [2021-05-01 04:02:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-05-01 04:02:52,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 04:02:52,018 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 04:02:52,019 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 04:02:52,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 04:02:52,019 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 04:02:52,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 04:02:52,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1748313539, now seen corresponding path program 1 times [2021-05-01 04:02:52,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 04:02:52,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031879105] [2021-05-01 04:02:52,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 04:02:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 04:02:52,054 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:52,054 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 04:02:52,055 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:52,055 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 04:02:52,059 INFO L142 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-05-01 04:02:52,060 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-01 04:02:52,061 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:52,062 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 04:02:52,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 04:02:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 04:02:52,086 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:52,087 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 04:02:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 04:02:52,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 04:02:52,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031879105] [2021-05-01 04:02:52,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031879105] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 04:02:52,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 04:02:52,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-01 04:02:52,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769351841] [2021-05-01 04:02:52,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-01 04:02:52,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 04:02:52,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-01 04:02:52,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-01 04:02:52,089 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-05-01 04:02:52,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 04:02:52,174 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2021-05-01 04:02:52,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-01 04:02:52,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2021-05-01 04:02:52,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 04:02:52,175 INFO L225 Difference]: With dead ends: 25 [2021-05-01 04:02:52,175 INFO L226 Difference]: Without dead ends: 25 [2021-05-01 04:02:52,176 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-01 04:02:52,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-01 04:02:52,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-05-01 04:02:52,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 04:02:52,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-05-01 04:02:52,178 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2021-05-01 04:02:52,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 04:02:52,178 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-05-01 04:02:52,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-05-01 04:02:52,178 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-05-01 04:02:52,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-01 04:02:52,179 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 04:02:52,179 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 04:02:52,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 04:02:52,179 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 04:02:52,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 04:02:52,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1606116621, now seen corresponding path program 1 times [2021-05-01 04:02:52,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 04:02:52,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404080046] [2021-05-01 04:02:52,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 04:02:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 04:02:52,199 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:52,199 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 04:02:52,200 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:52,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 04:02:52,204 INFO L142 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-05-01 04:02:52,205 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-01 04:02:52,206 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:52,206 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 04:02:52,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 04:02:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 04:02:52,227 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:02:52,228 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 04:02:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 04:02:52,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 04:02:52,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404080046] [2021-05-01 04:02:52,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404080046] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 04:02:52,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 04:02:52,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-01 04:02:52,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429731681] [2021-05-01 04:02:52,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-01 04:02:52,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 04:02:52,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-01 04:02:52,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-01 04:02:52,230 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2021-05-01 04:02:52,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 04:02:52,304 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-05-01 04:02:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-01 04:02:52,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 [2021-05-01 04:02:52,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 04:02:52,305 INFO L225 Difference]: With dead ends: 24 [2021-05-01 04:02:52,305 INFO L226 Difference]: Without dead ends: 24 [2021-05-01 04:02:52,306 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-01 04:02:52,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-01 04:02:52,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-05-01 04:02:52,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 04:02:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-05-01 04:02:52,308 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2021-05-01 04:02:52,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 04:02:52,308 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-05-01 04:02:52,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2021-05-01 04:02:52,309 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-05-01 04:02:52,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-01 04:02:52,309 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 04:02:52,309 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 04:02:52,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-01 04:02:52,309 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 04:02:52,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 04:02:52,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1773342651, now seen corresponding path program 1 times [2021-05-01 04:02:52,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 04:02:52,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902769158] [2021-05-01 04:02:52,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 04:02:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 04:02:52,327 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 04:02:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 04:02:52,339 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 04:02:52,351 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-01 04:02:52,351 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 04:02:52,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-01 04:02:52,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 04:02:52 BasicIcfg [2021-05-01 04:02:52,365 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 04:02:52,365 INFO L168 Benchmark]: Toolchain (without parser) took 1547.01 ms. Allocated memory is still 189.8 MB. Free memory was 155.9 MB in the beginning and 131.5 MB in the end (delta: 24.5 MB). Peak memory consumption was 25.4 MB. Max. memory is 8.0 GB. [2021-05-01 04:02:52,366 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 189.8 MB. Free memory is still 172.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 04:02:52,366 INFO L168 Benchmark]: CACSL2BoogieTranslator took 117.46 ms. Allocated memory is still 189.8 MB. Free memory was 155.7 MB in the beginning and 146.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-01 04:02:52,366 INFO L168 Benchmark]: Boogie Preprocessor took 47.33 ms. Allocated memory is still 189.8 MB. Free memory was 146.3 MB in the beginning and 174.1 MB in the end (delta: -27.8 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-01 04:02:52,367 INFO L168 Benchmark]: RCFGBuilder took 266.50 ms. Allocated memory is still 189.8 MB. Free memory was 174.1 MB in the beginning and 158.9 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-01 04:02:52,367 INFO L168 Benchmark]: IcfgTransformer took 216.67 ms. Allocated memory is still 189.8 MB. Free memory was 158.9 MB in the beginning and 145.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-01 04:02:52,367 INFO L168 Benchmark]: TraceAbstraction took 890.36 ms. Allocated memory is still 189.8 MB. Free memory was 144.7 MB in the beginning and 131.5 MB in the end (delta: 13.3 MB). Peak memory consumption was 14.8 MB. Max. memory is 8.0 GB. [2021-05-01 04:02:52,369 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from IcfgTransformer: - StatisticsResult: Jordan loop acceleration statistics 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 189.8 MB. Free memory is still 172.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 117.46 ms. Allocated memory is still 189.8 MB. Free memory was 155.7 MB in the beginning and 146.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.33 ms. Allocated memory is still 189.8 MB. Free memory was 146.3 MB in the beginning and 174.1 MB in the end (delta: -27.8 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 266.50 ms. Allocated memory is still 189.8 MB. Free memory was 174.1 MB in the beginning and 158.9 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 216.67 ms. Allocated memory is still 189.8 MB. Free memory was 158.9 MB in the beginning and 145.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 890.36 ms. Allocated memory is still 189.8 MB. Free memory was 144.7 MB in the beginning and 131.5 MB in the end (delta: 13.3 MB). Peak memory consumption was 14.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int x = 0; [L15] unsigned int y = 0; [L16] unsigned int z = 0; [L17] unsigned int w = 0; VAL [w=0, x=0, y=0, z=0] [L19] COND TRUE x < 0x0fffffff [L20] y = 0 VAL [w=0, x=0, y=0, z=0] [L22] COND TRUE y < 0x0fffffff [L23] z =0 VAL [w=0, x=0, y=0, z=0] [L24] COND TRUE z <0x0fffffff [L25] z++ VAL [w=0, x=0, y=0, z=268435455, z++=268435456] [L24] COND FALSE !(z <0x0fffffff) VAL [w=0, x=0, y=0, z=268435455, z++=268435456] [L27] CALL __VERIFIER_assert(!(z % 4)) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 837.6ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 9.0ms, AutomataDifference: 337.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 81 SDtfs, 79 SDslu, 30 SDs, 0 SdLazy, 75 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 178.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 153.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 25.1ms AutomataMinimizationTime, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 21.0ms SsaConstructionTime, 80.4ms SatisfiabilityAnalysisTime, 240.9ms InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 169 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...