/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 06:35:49,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 06:35:49,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 06:35:49,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 06:35:49,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 06:35:49,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 06:35:49,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 06:35:49,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 06:35:49,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 06:35:49,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 06:35:49,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 06:35:49,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 06:35:49,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 06:35:49,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 06:35:49,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 06:35:49,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 06:35:49,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 06:35:49,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 06:35:49,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 06:35:49,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 06:35:49,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 06:35:49,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 06:35:49,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 06:35:49,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 06:35:49,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 06:35:49,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 06:35:49,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 06:35:49,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 06:35:49,799 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 06:35:49,806 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 06:35:49,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 06:35:49,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 06:35:49,807 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 06:35:49,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 06:35:49,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 06:35:49,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 06:35:49,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 06:35:49,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 06:35:49,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 06:35:49,808 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 06:35:49,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 06:35:49,808 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 06:35:49,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 06:35:49,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 06:35:49,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 06:35:49,809 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 06:35:49,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 06:35:49,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 06:35:49,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 06:35:49,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 06:35:49,810 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 06:35:49,810 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 06:35:50,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 06:35:50,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 06:35:50,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 06:35:50,085 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 06:35:50,085 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 06:35:50,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2021-05-06 06:35:50,128 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bb2fd729/32d45bcafcb54602ad0ab718f3b5f995/FLAGe4c19fbc7 [2021-05-06 06:35:50,493 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 06:35:50,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2021-05-06 06:35:50,498 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bb2fd729/32d45bcafcb54602ad0ab718f3b5f995/FLAGe4c19fbc7 [2021-05-06 06:35:50,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bb2fd729/32d45bcafcb54602ad0ab718f3b5f995 [2021-05-06 06:35:50,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 06:35:50,515 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 06:35:50,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 06:35:50,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 06:35:50,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 06:35:50,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 06:35:50" (1/1) ... [2021-05-06 06:35:50,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46de5e50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:35:50, skipping insertion in model container [2021-05-06 06:35:50,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 06:35:50" (1/1) ... [2021-05-06 06:35:50,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 06:35:50,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 06:35:50,643 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] [2021-05-06 06:35:50,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 06:35:50,659 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 06:35:50,668 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] [2021-05-06 06:35:50,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 06:35:50,687 INFO L208 MainTranslator]: Completed translation [2021-05-06 06:35:50,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:35:50 WrapperNode [2021-05-06 06:35:50,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 06:35:50,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 06:35:50,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 06:35:50,690 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 06:35:50,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:35:50" (1/1) ... [2021-05-06 06:35:50,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:35:50" (1/1) ... [2021-05-06 06:35:50,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:35:50" (1/1) ... [2021-05-06 06:35:50,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:35:50" (1/1) ... [2021-05-06 06:35:50,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:35:50" (1/1) ... [2021-05-06 06:35:50,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:35:50" (1/1) ... [2021-05-06 06:35:50,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:35:50" (1/1) ... [2021-05-06 06:35:50,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 06:35:50,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 06:35:50,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 06:35:50,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 06:35:50,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:35:50" (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 [2021-05-06 06:35:50,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 06:35:50,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 06:35:50,827 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 06:35:50,827 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 06:35:50,828 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 06:35:50,828 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 06:35:50,828 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 06:35:50,828 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 06:35:50,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 06:35:50,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 06:35:50,828 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 06:35:50,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 06:35:50,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 06:35:50,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 06:35:50,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 06:35:50,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 06:35:50,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 06:35:51,034 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 06:35:51,035 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 06:35:51,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:35:51 BoogieIcfgContainer [2021-05-06 06:35:51,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 06:35:51,036 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 06:35:51,036 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 06:35:51,037 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 06:35:51,038 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:35:51" (1/1) ... [2021-05-06 06:35:51,110 WARN L240 tifierPushTermWalker]: treesize reduction 3, result has 94.0 percent of original size [2021-05-06 06:35:51,177 WARN L245 tifierPushTermWalker]: treesize reduction 3, result has 94.0 percent of original size 47 [2021-05-06 06:35:51,200 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 06:35:51,201 INFO L91 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] to Formula: (let ((.cse0 (mod v_main_~z~0_3 4294967296))) (or (and (< 0 v_itFin_1) (< .cse0 268435455) (= v_main_~z~0_2 (+ v_itFin_1 v_main_~z~0_3)) (<= (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 .cse0)))) 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] [2021-05-06 06:35:51,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 06:35:51 BasicIcfg [2021-05-06 06:35:51,208 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 06:35:51,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 06:35:51,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 06:35:51,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 06:35:51,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 06:35:50" (1/4) ... [2021-05-06 06:35:51,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e293ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 06:35:51, skipping insertion in model container [2021-05-06 06:35:51,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:35:50" (2/4) ... [2021-05-06 06:35:51,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e293ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 06:35:51, skipping insertion in model container [2021-05-06 06:35:51,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:35:51" (3/4) ... [2021-05-06 06:35:51,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e293ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 06:35:51, skipping insertion in model container [2021-05-06 06:35:51,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 06:35:51" (4/4) ... [2021-05-06 06:35:51,215 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-2.cJordan [2021-05-06 06:35:51,218 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 06:35:51,220 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 06:35:51,229 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 06:35:51,244 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 06:35:51,245 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 06:35:51,245 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 06:35:51,245 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 06:35:51,245 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 06:35:51,245 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 06:35:51,245 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 06:35:51,245 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 06:35:51,253 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) [2021-05-06 06:35:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 06:35:51,256 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:35:51,257 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:35:51,257 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:35:51,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:35:51,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1301415802, now seen corresponding path program 1 times [2021-05-06 06:35:51,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:35:51,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761242977] [2021-05-06 06:35:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:35:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:51,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:35:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:35:51,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:35:51,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761242977] [2021-05-06 06:35:51,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761242977] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:35:51,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:35:51,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 06:35:51,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567609991] [2021-05-06 06:35:51,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 06:35:51,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:35:51,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 06:35:51,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 06:35:51,387 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) [2021-05-06 06:35:51,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:35:51,427 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-05-06 06:35:51,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 06:35:51,428 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 [2021-05-06 06:35:51,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:35:51,432 INFO L225 Difference]: With dead ends: 25 [2021-05-06 06:35:51,432 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 06:35:51,433 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 06:35:51,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 06:35:51,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-06 06:35:51,452 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) [2021-05-06 06:35:51,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-05-06 06:35:51,454 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2021-05-06 06:35:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:35:51,454 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-05-06 06:35:51,454 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) [2021-05-06 06:35:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-05-06 06:35:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 06:35:51,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:35:51,455 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:35:51,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 06:35:51,456 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:35:51,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:35:51,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1302339323, now seen corresponding path program 1 times [2021-05-06 06:35:51,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:35:51,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212223234] [2021-05-06 06:35:51,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:35:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:51,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:35:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:35:51,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:35:51,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212223234] [2021-05-06 06:35:51,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212223234] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:35:51,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:35:51,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 06:35:51,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322887830] [2021-05-06 06:35:51,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 06:35:51,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:35:51,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 06:35:51,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 06:35:51,595 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) [2021-05-06 06:35:51,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:35:51,692 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2021-05-06 06:35:51,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 06:35:51,693 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 [2021-05-06 06:35:51,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:35:51,694 INFO L225 Difference]: With dead ends: 27 [2021-05-06 06:35:51,694 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 06:35:51,694 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 06:35:51,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 06:35:51,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-05-06 06:35:51,700 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) [2021-05-06 06:35:51,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-05-06 06:35:51,702 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2021-05-06 06:35:51,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:35:51,703 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-05-06 06:35:51,703 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) [2021-05-06 06:35:51,703 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-05-06 06:35:51,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 06:35:51,704 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:35:51,704 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:35:51,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 06:35:51,704 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:35:51,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:35:51,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1748313539, now seen corresponding path program 1 times [2021-05-06 06:35:51,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:35:51,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208648151] [2021-05-06 06:35:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:35:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:51,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:35:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:35:51,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:35:51,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208648151] [2021-05-06 06:35:51,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208648151] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:35:51,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:35:51,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 06:35:51,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581707941] [2021-05-06 06:35:51,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 06:35:51,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:35:51,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 06:35:51,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 06:35:51,796 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) [2021-05-06 06:35:51,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:35:51,872 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2021-05-06 06:35:51,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 06:35:51,873 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 [2021-05-06 06:35:51,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:35:51,874 INFO L225 Difference]: With dead ends: 25 [2021-05-06 06:35:51,874 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 06:35:51,874 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 06:35:51,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 06:35:51,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-05-06 06:35:51,879 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) [2021-05-06 06:35:51,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-05-06 06:35:51,880 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2021-05-06 06:35:51,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:35:51,880 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-05-06 06:35:51,880 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) [2021-05-06 06:35:51,880 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-05-06 06:35:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 06:35:51,881 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:35:51,881 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:35:51,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 06:35:51,881 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:35:51,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:35:51,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1606116621, now seen corresponding path program 1 times [2021-05-06 06:35:51,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:35:51,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622769876] [2021-05-06 06:35:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:35:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:51,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:35:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:35:51,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:35:51,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622769876] [2021-05-06 06:35:51,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622769876] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:35:51,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:35:51,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 06:35:51,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024575699] [2021-05-06 06:35:51,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 06:35:51,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:35:51,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 06:35:51,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 06:35:51,954 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) [2021-05-06 06:35:52,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:35:52,022 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-05-06 06:35:52,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 06:35:52,023 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 [2021-05-06 06:35:52,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:35:52,024 INFO L225 Difference]: With dead ends: 24 [2021-05-06 06:35:52,024 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 06:35:52,025 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 06:35:52,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 06:35:52,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-05-06 06:35:52,028 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) [2021-05-06 06:35:52,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-05-06 06:35:52,030 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2021-05-06 06:35:52,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:35:52,030 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-05-06 06:35:52,030 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) [2021-05-06 06:35:52,030 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-05-06 06:35:52,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 06:35:52,031 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:35:52,031 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:35:52,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 06:35:52,031 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:35:52,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:35:52,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1773342651, now seen corresponding path program 1 times [2021-05-06 06:35:52,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:35:52,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417990615] [2021-05-06 06:35:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:35:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 06:35:52,064 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 06:35:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 06:35:52,084 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 06:35:52,095 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 06:35:52,095 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 06:35:52,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-06 06:35:52,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 06:35:52 BasicIcfg [2021-05-06 06:35:52,110 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 06:35:52,111 INFO L168 Benchmark]: Toolchain (without parser) took 1596.47 ms. Allocated memory is still 189.8 MB. Free memory was 154.7 MB in the beginning and 97.7 MB in the end (delta: 57.0 MB). Peak memory consumption was 57.2 MB. Max. memory is 8.0 GB. [2021-05-06 06:35:52,111 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 189.8 MB. Free memory is still 171.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 06:35:52,111 INFO L168 Benchmark]: CACSL2BoogieTranslator took 169.96 ms. Allocated memory is still 189.8 MB. Free memory was 154.5 MB in the beginning and 145.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 06:35:52,112 INFO L168 Benchmark]: Boogie Preprocessor took 67.95 ms. Allocated memory is still 189.8 MB. Free memory was 145.0 MB in the beginning and 173.0 MB in the end (delta: -28.0 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. [2021-05-06 06:35:52,112 INFO L168 Benchmark]: RCFGBuilder took 278.91 ms. Allocated memory is still 189.8 MB. Free memory was 173.0 MB in the beginning and 158.8 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 06:35:52,112 INFO L168 Benchmark]: IcfgTransformer took 172.34 ms. Allocated memory is still 189.8 MB. Free memory was 158.8 MB in the beginning and 146.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-06 06:35:52,113 INFO L168 Benchmark]: TraceAbstraction took 899.37 ms. Allocated memory is still 189.8 MB. Free memory was 146.2 MB in the beginning and 97.7 MB in the end (delta: 48.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 8.0 GB. [2021-05-06 06:35:52,114 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 0.09 ms. Allocated memory is still 189.8 MB. Free memory is still 171.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 169.96 ms. Allocated memory is still 189.8 MB. Free memory was 154.5 MB in the beginning and 145.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 67.95 ms. Allocated memory is still 189.8 MB. Free memory was 145.0 MB in the beginning and 173.0 MB in the end (delta: -28.0 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 278.91 ms. Allocated memory is still 189.8 MB. Free memory was 173.0 MB in the beginning and 158.8 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 172.34 ms. Allocated memory is still 189.8 MB. Free memory was 158.8 MB in the beginning and 146.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 899.37 ms. Allocated memory is still 189.8 MB. Free memory was 146.2 MB in the beginning and 97.7 MB in the end (delta: 48.5 MB). Peak memory consumption was 48.5 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: 852.8ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 8.5ms, AutomataDifference: 306.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 81 SDtfs, 79 SDslu, 30 SDs, 0 SdLazy, 75 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 145.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 186.7ms 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: 29.1ms AutomataMinimizationTime, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 16.0ms SsaConstructionTime, 118.8ms SatisfiabilityAnalysisTime, 247.1ms 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...