/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-a47f07a [2021-04-16 04:15:44,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 04:15:44,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 04:15:44,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-16 04:15:44,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-16 04:15:44,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-16 04:15:44,508 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-16 04:15:44,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-16 04:15:44,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-16 04:15:44,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-16 04:15:44,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-16 04:15:44,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-16 04:15:44,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 04:15:44,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 04:15:44,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 04:15:44,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 04:15:44,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 04:15:44,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 04:15:44,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 04:15:44,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 04:15:44,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 04:15:44,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 04:15:44,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 04:15:44,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 04:15:44,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-04-16 04:15:44,542 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-04-16 04:15:44,542 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-04-16 04:15:44,543 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-04-16 04:15:44,544 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-04-16 04:15:44,544 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-04-16 04:15:44,544 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-04-16 04:15:44,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-04-16 04:15:44,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-04-16 04:15:44,546 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-04-16 04:15:44,547 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-04-16 04:15:44,547 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-04-16 04:15:44,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-04-16 04:15:44,548 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-04-16 04:15:44,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 04:15:44,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 04:15:44,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 04:15:44,552 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-04-16 04:15:44,565 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 04:15:44,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 04:15:44,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 04:15:44,567 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 04:15:44,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 04:15:44,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 04:15:44,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 04:15:44,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 04:15:44,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 04:15:44,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 04:15:44,569 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 04:15:44,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 04:15:44,569 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 04:15:44,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 04:15:44,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 04:15:44,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 04:15:44,570 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 04:15:44,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 04:15:44,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 04:15:44,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 04:15:44,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-16 04:15:44,571 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-04-16 04:15:44,571 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 04:15:44,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 04:15:44,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 04:15:44,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 04:15:44,812 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 04:15:44,813 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 04:15:44,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2021-04-16 04:15:44,877 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e973ecf3/1dd7087feeef457ab5506c7170168e6d/FLAG569432a2a [2021-04-16 04:15:45,179 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 04:15:45,179 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2021-04-16 04:15:45,183 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e973ecf3/1dd7087feeef457ab5506c7170168e6d/FLAG569432a2a [2021-04-16 04:15:45,630 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e973ecf3/1dd7087feeef457ab5506c7170168e6d [2021-04-16 04:15:45,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 04:15:45,634 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-04-16 04:15:45,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 04:15:45,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 04:15:45,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 04:15:45,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 04:15:45" (1/1) ... [2021-04-16 04:15:45,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25c9cb26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 04:15:45, skipping insertion in model container [2021-04-16 04:15:45,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 04:15:45" (1/1) ... [2021-04-16 04:15:45,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 04:15:45,657 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 04:15:45,732 WARN L226 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] [2021-04-16 04:15:45,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 04:15:45,745 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 04:15:45,752 WARN L226 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] [2021-04-16 04:15:45,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 04:15:45,763 INFO L208 MainTranslator]: Completed translation [2021-04-16 04:15:45,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 04:15:45 WrapperNode [2021-04-16 04:15:45,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 04:15:45,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 04:15:45,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 04:15:45,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 04:15:45,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 04:15:45" (1/1) ... [2021-04-16 04:15:45,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 04:15:45" (1/1) ... [2021-04-16 04:15:45,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 04:15:45" (1/1) ... [2021-04-16 04:15:45,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 04:15:45" (1/1) ... [2021-04-16 04:15:45,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 04:15:45" (1/1) ... [2021-04-16 04:15:45,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 04:15:45" (1/1) ... [2021-04-16 04:15:45,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 04:15:45" (1/1) ... [2021-04-16 04:15:45,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 04:15:45,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 04:15:45,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 04:15:45,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 04:15:45,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 04:15:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 04:15:45,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 04:15:45,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 04:15:45,889 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 04:15:45,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 04:15:45,889 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 04:15:45,889 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 04:15:45,889 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 04:15:45,890 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 04:15:45,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 04:15:45,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 04:15:45,890 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 04:15:45,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 04:15:45,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 04:15:45,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 04:15:45,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 04:15:45,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 04:15:45,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 04:15:46,107 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 04:15:46,107 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-04-16 04:15:46,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 04:15:46 BoogieIcfgContainer [2021-04-16 04:15:46,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 04:15:46,109 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-04-16 04:15:46,109 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-04-16 04:15:46,110 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-04-16 04:15:46,112 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 04:15:46" (1/1) ... [2021-04-16 04:15:46,163 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:46,177 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-16 04:15:46,178 INFO L175 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[] [2021-04-16 04:15:46,190 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.1 percent of original size [2021-04-16 04:15:46,205 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:46,227 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:46,252 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 04:15:46,258 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:46,263 INFO L108 tifierPushTermWalker]: treesize reduction 14, result has 6.7 percent of original size [2021-04-16 04:15:46,272 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:46,277 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:46,282 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:46,285 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:46,287 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:46,291 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:46,295 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.1 percent of original size 54 [2021-04-16 04:15:46,339 INFO L1067 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] [2021-04-16 04:15:46,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 16.04 04:15:46 BasicIcfg [2021-04-16 04:15:46,346 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-04-16 04:15:46,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 04:15:46,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 04:15:46,348 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 04:15:46,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 04:15:45" (1/4) ... [2021-04-16 04:15:46,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658803cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 04:15:46, skipping insertion in model container [2021-04-16 04:15:46,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 04:15:45" (2/4) ... [2021-04-16 04:15:46,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658803cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 04:15:46, skipping insertion in model container [2021-04-16 04:15:46,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 04:15:46" (3/4) ... [2021-04-16 04:15:46,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658803cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 04:15:46, skipping insertion in model container [2021-04-16 04:15:46,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 16.04 04:15:46" (4/4) ... [2021-04-16 04:15:46,350 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-2.cJordan [2021-04-16 04:15:46,354 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-04-16 04:15:46,372 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 04:15:46,383 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 04:15:46,394 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 04:15:46,394 INFO L377 AbstractCegarLoop]: Hoare is false [2021-04-16 04:15:46,394 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-04-16 04:15:46,394 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 04:15:46,394 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 04:15:46,394 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 04:15:46,394 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 04:15:46,394 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 04:15:46,403 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) [2021-04-16 04:15:46,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-16 04:15:46,407 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 04:15:46,407 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 04:15:46,408 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 04:15:46,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 04:15:46,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1301415802, now seen corresponding path program 1 times [2021-04-16 04:15:46,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-16 04:15:46,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462611102] [2021-04-16 04:15:46,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 04:15:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 04:15:46,537 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:46,537 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 04:15:46,538 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:46,538 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 04:15:46,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 04:15:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 04:15:46,575 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:46,576 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 04:15:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 04:15:46,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462611102] [2021-04-16 04:15:46,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 04:15:46,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 04:15:46,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876662293] [2021-04-16 04:15:46,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 04:15:46,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-16 04:15:46,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 04:15:46,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 04:15:46,595 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) [2021-04-16 04:15:46,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 04:15:46,657 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-04-16 04:15:46,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 04:15:46,659 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 [2021-04-16 04:15:46,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 04:15:46,664 INFO L225 Difference]: With dead ends: 25 [2021-04-16 04:15:46,664 INFO L226 Difference]: Without dead ends: 20 [2021-04-16 04:15:46,665 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 04:15:46,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-04-16 04:15:46,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-04-16 04:15:46,688 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) [2021-04-16 04:15:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-04-16 04:15:46,691 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2021-04-16 04:15:46,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 04:15:46,691 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-04-16 04:15:46,691 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) [2021-04-16 04:15:46,691 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-04-16 04:15:46,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-16 04:15:46,692 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 04:15:46,692 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 04:15:46,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 04:15:46,693 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 04:15:46,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 04:15:46,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1302339323, now seen corresponding path program 1 times [2021-04-16 04:15:46,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-16 04:15:46,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541596974] [2021-04-16 04:15:46,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 04:15:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 04:15:46,757 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:46,757 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 04:15:46,758 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:46,759 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 04:15:46,771 INFO L142 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-04-16 04:15:46,774 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-04-16 04:15:46,778 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:46,778 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 04:15:46,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 04:15:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 04:15:46,833 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:46,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 04:15:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 04:15:46,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541596974] [2021-04-16 04:15:46,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 04:15:46,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-16 04:15:46,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328899789] [2021-04-16 04:15:46,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-16 04:15:46,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-16 04:15:46,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-16 04:15:46,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-16 04:15:46,840 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) [2021-04-16 04:15:46,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 04:15:46,925 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2021-04-16 04:15:46,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-16 04:15:46,930 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 [2021-04-16 04:15:46,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 04:15:46,931 INFO L225 Difference]: With dead ends: 27 [2021-04-16 04:15:46,931 INFO L226 Difference]: Without dead ends: 27 [2021-04-16 04:15:46,931 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-16 04:15:46,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-04-16 04:15:46,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-04-16 04:15:46,937 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) [2021-04-16 04:15:46,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-04-16 04:15:46,939 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2021-04-16 04:15:46,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 04:15:46,939 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-04-16 04:15:46,939 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) [2021-04-16 04:15:46,939 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-04-16 04:15:46,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-16 04:15:46,940 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 04:15:46,940 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 04:15:46,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 04:15:46,940 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 04:15:46,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 04:15:46,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1748313539, now seen corresponding path program 1 times [2021-04-16 04:15:46,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-16 04:15:46,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156176921] [2021-04-16 04:15:46,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 04:15:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 04:15:46,980 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:46,980 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 04:15:46,981 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:46,981 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 04:15:46,987 INFO L142 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-04-16 04:15:46,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-04-16 04:15:46,993 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:46,993 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 04:15:47,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 04:15:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 04:15:47,034 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:47,035 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 04:15:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 04:15:47,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156176921] [2021-04-16 04:15:47,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 04:15:47,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-16 04:15:47,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794450577] [2021-04-16 04:15:47,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-16 04:15:47,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-16 04:15:47,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-16 04:15:47,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-16 04:15:47,036 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) [2021-04-16 04:15:47,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 04:15:47,115 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2021-04-16 04:15:47,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-16 04:15:47,116 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 [2021-04-16 04:15:47,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 04:15:47,116 INFO L225 Difference]: With dead ends: 25 [2021-04-16 04:15:47,116 INFO L226 Difference]: Without dead ends: 25 [2021-04-16 04:15:47,117 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-16 04:15:47,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-04-16 04:15:47,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-04-16 04:15:47,119 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) [2021-04-16 04:15:47,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-04-16 04:15:47,119 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2021-04-16 04:15:47,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 04:15:47,119 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-04-16 04:15:47,119 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) [2021-04-16 04:15:47,120 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-04-16 04:15:47,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-16 04:15:47,120 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 04:15:47,120 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 04:15:47,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-16 04:15:47,120 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 04:15:47,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 04:15:47,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1606116621, now seen corresponding path program 1 times [2021-04-16 04:15:47,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-16 04:15:47,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64998741] [2021-04-16 04:15:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 04:15:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 04:15:47,152 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:47,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 04:15:47,153 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:47,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 04:15:47,160 INFO L142 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-04-16 04:15:47,161 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-04-16 04:15:47,163 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:47,163 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 04:15:47,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 04:15:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 04:15:47,185 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 04:15:47,185 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 04:15:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 04:15:47,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64998741] [2021-04-16 04:15:47,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 04:15:47,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-16 04:15:47,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454683135] [2021-04-16 04:15:47,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-16 04:15:47,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-16 04:15:47,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-16 04:15:47,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-16 04:15:47,187 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) [2021-04-16 04:15:47,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 04:15:47,255 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-04-16 04:15:47,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-16 04:15:47,255 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 [2021-04-16 04:15:47,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 04:15:47,256 INFO L225 Difference]: With dead ends: 24 [2021-04-16 04:15:47,256 INFO L226 Difference]: Without dead ends: 24 [2021-04-16 04:15:47,256 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-16 04:15:47,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-04-16 04:15:47,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-04-16 04:15:47,263 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) [2021-04-16 04:15:47,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-04-16 04:15:47,266 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2021-04-16 04:15:47,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 04:15:47,267 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-04-16 04:15:47,267 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) [2021-04-16 04:15:47,267 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-04-16 04:15:47,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-16 04:15:47,268 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 04:15:47,268 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 04:15:47,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-16 04:15:47,268 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 04:15:47,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 04:15:47,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1773342651, now seen corresponding path program 1 times [2021-04-16 04:15:47,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-16 04:15:47,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608738895] [2021-04-16 04:15:47,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 04:15:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-16 04:15:47,302 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-16 04:15:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-16 04:15:47,322 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-16 04:15:47,343 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-04-16 04:15:47,343 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 04:15:47,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-16 04:15:47,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 04:15:47 BasicIcfg [2021-04-16 04:15:47,367 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 04:15:47,371 INFO L168 Benchmark]: Toolchain (without parser) took 1733.79 ms. Allocated memory is still 202.4 MB. Free memory was 168.0 MB in the beginning and 168.6 MB in the end (delta: -664.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 04:15:47,371 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 202.4 MB. Free memory is still 184.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 04:15:47,372 INFO L168 Benchmark]: CACSL2BoogieTranslator took 125.94 ms. Allocated memory is still 202.4 MB. Free memory was 167.8 MB in the beginning and 158.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-04-16 04:15:47,372 INFO L168 Benchmark]: Boogie Preprocessor took 48.73 ms. Allocated memory is still 202.4 MB. Free memory was 158.3 MB in the beginning and 185.6 MB in the end (delta: -27.2 MB). Peak memory consumption was 2.6 MB. Max. memory is 8.0 GB. [2021-04-16 04:15:47,372 INFO L168 Benchmark]: RCFGBuilder took 294.32 ms. Allocated memory is still 202.4 MB. Free memory was 185.6 MB in the beginning and 170.4 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-04-16 04:15:47,373 INFO L168 Benchmark]: IcfgTransformer took 236.61 ms. Allocated memory is still 202.4 MB. Free memory was 170.4 MB in the beginning and 156.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-04-16 04:15:47,374 INFO L168 Benchmark]: TraceAbstraction took 1020.94 ms. Allocated memory is still 202.4 MB. Free memory was 156.7 MB in the beginning and 168.6 MB in the end (delta: -11.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 04:15:47,378 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 202.4 MB. Free memory is still 184.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 125.94 ms. Allocated memory is still 202.4 MB. Free memory was 167.8 MB in the beginning and 158.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.73 ms. Allocated memory is still 202.4 MB. Free memory was 158.3 MB in the beginning and 185.6 MB in the end (delta: -27.2 MB). Peak memory consumption was 2.6 MB. Max. memory is 8.0 GB. * RCFGBuilder took 294.32 ms. Allocated memory is still 202.4 MB. Free memory was 185.6 MB in the beginning and 170.4 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 236.61 ms. Allocated memory is still 202.4 MB. Free memory was 170.4 MB in the beginning and 156.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1020.94 ms. Allocated memory is still 202.4 MB. Free memory was 156.7 MB in the beginning and 168.6 MB in the end (delta: -11.9 MB). There was no memory consumed. 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: 951.8ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 9.0ms, AutomataDifference: 324.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 81 SDtfs, 79 SDslu, 30 SDs, 0 SdLazy, 75 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 155.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 188.7ms 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: 35.5ms AutomataMinimizationTime, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 17.7ms SsaConstructionTime, 101.2ms SatisfiabilityAnalysisTime, 309.3ms 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...