/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:54:39,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:54:39,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:54:39,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 17:54:39,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 17:54:39,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 17:54:39,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 17:54:39,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 17:54:39,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 17:54:39,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 17:54:39,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 17:54:39,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 17:54:39,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:54:39,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:54:39,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:54:39,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:54:39,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:54:39,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:54:39,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:54:39,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:54:39,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:54:39,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:54:39,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:54:39,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:54:39,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 17:54:39,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 17:54:39,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 17:54:39,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 17:54:39,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 17:54:39,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 17:54:39,552 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 17:54:39,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 17:54:39,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 17:54:39,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 17:54:39,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 17:54:39,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 17:54:39,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 17:54:39,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 17:54:39,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:54:39,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:54:39,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:54:39,556 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 17:54:39,568 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:54:39,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:54:39,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:54:39,571 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:54:39,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:54:39,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:54:39,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:54:39,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:54:39,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:54:39,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:54:39,572 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:54:39,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:54:39,572 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:54:39,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:54:39,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:54:39,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:54:39,572 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 17:54:39,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:54:39,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:54:39,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:54:39,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:54:39,573 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 17:54:39,573 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:54:39,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:54:39,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:54:39,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:54:39,832 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:54:39,833 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:54:39,834 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2021-05-02 17:54:39,874 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ccb9bf35/4d9708b93c094680af08726e0853e798/FLAG70403bc6b [2021-05-02 17:54:40,230 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:54:40,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2021-05-02 17:54:40,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ccb9bf35/4d9708b93c094680af08726e0853e798/FLAG70403bc6b [2021-05-02 17:54:40,687 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ccb9bf35/4d9708b93c094680af08726e0853e798 [2021-05-02 17:54:40,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:54:40,690 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 17:54:40,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:54:40,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:54:40,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:54:40,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:54:40" (1/1) ... [2021-05-02 17:54:40,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45170d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:54:40, skipping insertion in model container [2021-05-02 17:54:40,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:54:40" (1/1) ... [2021-05-02 17:54:40,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:54:40,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:54:40,792 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-1.c[322,335] [2021-05-02 17:54:40,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:54:40,804 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:54:40,811 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-1.c[322,335] [2021-05-02 17:54:40,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:54:40,821 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:54:40,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:54:40 WrapperNode [2021-05-02 17:54:40,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:54:40,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:54:40,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:54:40,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:54:40,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:54:40" (1/1) ... [2021-05-02 17:54:40,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:54:40" (1/1) ... [2021-05-02 17:54:40,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:54:40" (1/1) ... [2021-05-02 17:54:40,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:54:40" (1/1) ... [2021-05-02 17:54:40,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:54:40" (1/1) ... [2021-05-02 17:54:40,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:54:40" (1/1) ... [2021-05-02 17:54:40,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:54:40" (1/1) ... [2021-05-02 17:54:40,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:54:40,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:54:40,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:54:40,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:54:40,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:54:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:54:40,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:54:40,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:54:40,937 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:54:40,937 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:54:40,937 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:54:40,938 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:54:40,938 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:54:40,938 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:54:40,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:54:40,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:54:40,939 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:54:40,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:54:40,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:54:40,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:54:40,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:54:40,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:54:40,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:54:41,156 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:54:41,156 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 17:54:41,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:54:41 BoogieIcfgContainer [2021-05-02 17:54:41,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:54:41,158 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 17:54:41,158 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 17:54:41,158 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 17:54:41,160 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:54:41" (1/1) ... [2021-05-02 17:54:41,214 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~y~0_5 4294967296) 10) InVars {main_~y~0=v_main_~y~0_5} OutVars{main_~y~0=v_main_~y~0_5} AuxVars[] AssignedVars[] [2021-05-02 17:54:41,224 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.1 percent of original size [2021-05-02 17:54:43,272 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 3 [2021-05-02 17:54:47,286 WARN L205 SmtUtils]: Spent 4.01 s on a formula simplification that was a NOOP. DAG size: 5 [2021-05-02 17:54:48,236 WARN L205 SmtUtils]: Spent 942.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-05-02 17:54:48,291 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.1 percent of original size 54 [2021-05-02 17:54:48,319 INFO L1112 elerationTransformer]: Accelerated Formula: (and (= (+ v_main_~y~0_5 1) v_main_~y~0_4) (< (mod v_main_~y~0_5 4294967296) 10)) InVars {main_~y~0=v_main_~y~0_5} OutVars{main_~y~0=v_main_~y~0_4, main_#t~post7=|v_main_#t~post7_1|} AuxVars[] AssignedVars[main_~y~0, main_#t~post7] with Formula: (let ((.cse0 (mod v_main_~y~0_5 4294967296))) (or (and (= |v_main_#t~post7_3| |v_main_#t~post7_1|) (= v_itFin_1 0) (<= 10 .cse0) (= v_main_~y~0_4 v_main_~y~0_5)) (let ((.cse1 (+ v_itFin_1 v_main_~y~0_5))) (and (< 0 v_itFin_1) (= v_main_~y~0_4 .cse1) (< .cse0 10) (<= 10 (mod .cse1 4294967296)) (<= (div (+ (* v_itFin_1 (- 1)) (* v_main_~y~0_5 (- 1)) 10) (- 4294967296)) (+ (div (+ v_main_~y~0_5 (- 4294967295)) 4294967296) 1)))))) InVars {main_~y~0=v_main_~y~0_5, main_#t~post7=|v_main_#t~post7_3|} OutVars{main_~y~0=v_main_~y~0_4, main_#t~post7=|v_main_#t~post7_1|} AuxVars[v_itFin_1] AssignedVars[main_~y~0, main_#t~post7] [2021-05-02 17:54:48,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:54:48 BasicIcfg [2021-05-02 17:54:48,325 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 17:54:48,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:54:48,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:54:48,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:54:48,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:54:40" (1/4) ... [2021-05-02 17:54:48,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234c9e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:54:48, skipping insertion in model container [2021-05-02 17:54:48,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:54:40" (2/4) ... [2021-05-02 17:54:48,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234c9e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:54:48, skipping insertion in model container [2021-05-02 17:54:48,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:54:41" (3/4) ... [2021-05-02 17:54:48,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234c9e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:54:48, skipping insertion in model container [2021-05-02 17:54:48,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:54:48" (4/4) ... [2021-05-02 17:54:48,329 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-1.cJordan [2021-05-02 17:54:48,333 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:54:48,335 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:54:48,345 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:54:48,359 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:54:48,359 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 17:54:48,359 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 17:54:48,359 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:54:48,359 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:54:48,360 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:54:48,360 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:54:48,360 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:54:48,367 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:54:48,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 17:54:48,377 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:54:48,378 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:54:48,378 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:54:48,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:54:48,382 INFO L82 PathProgramCache]: Analyzing trace with hash -962721461, now seen corresponding path program 1 times [2021-05-02 17:54:48,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:54:48,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269056727] [2021-05-02 17:54:48,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:54:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:48,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:54:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:54:48,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:54:48,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269056727] [2021-05-02 17:54:48,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269056727] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:54:48,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:54:48,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:54:48,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973403038] [2021-05-02 17:54:48,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:54:48,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:54:48,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:54:48,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:54:48,523 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:48,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:54:48,552 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-05-02 17:54:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:54:48,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 17:54:48,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:54:48,558 INFO L225 Difference]: With dead ends: 20 [2021-05-02 17:54:48,558 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 17:54:48,559 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:54:48,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 17:54:48,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 17:54:48,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-05-02 17:54:48,577 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-05-02 17:54:48,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:54:48,577 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-05-02 17:54:48,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:48,578 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-05-02 17:54:48,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 17:54:48,578 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:54:48,578 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:54:48,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:54:48,578 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:54:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:54:48,579 INFO L82 PathProgramCache]: Analyzing trace with hash -961797940, now seen corresponding path program 1 times [2021-05-02 17:54:48,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:54:48,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679887443] [2021-05-02 17:54:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:54:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:48,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:54:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:54:48,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:54:48,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679887443] [2021-05-02 17:54:48,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679887443] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:54:48,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:54:48,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 17:54:48,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706564983] [2021-05-02 17:54:48,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 17:54:48,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:54:48,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 17:54:48,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:54:48,662 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:48,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:54:48,703 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2021-05-02 17:54:48,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 17:54:48,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 17:54:48,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:54:48,704 INFO L225 Difference]: With dead ends: 17 [2021-05-02 17:54:48,704 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 17:54:48,705 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 17:54:48,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 17:54:48,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-05-02 17:54:48,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:48,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-02 17:54:48,708 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-05-02 17:54:48,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:54:48,708 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-02 17:54:48,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:48,708 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-02 17:54:48,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 17:54:48,708 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:54:48,709 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:54:48,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:54:48,709 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:54:48,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:54:48,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1952633576, now seen corresponding path program 1 times [2021-05-02 17:54:48,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:54:48,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248689245] [2021-05-02 17:54:48,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:54:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:48,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:54:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:48,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:54:48,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:54:48,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248689245] [2021-05-02 17:54:48,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248689245] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:54:48,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:54:48,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 17:54:48,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976367821] [2021-05-02 17:54:48,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 17:54:48,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:54:48,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 17:54:48,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:54:48,798 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:48,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:54:48,860 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-05-02 17:54:48,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 17:54:48,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2021-05-02 17:54:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:54:48,861 INFO L225 Difference]: With dead ends: 16 [2021-05-02 17:54:48,861 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 17:54:48,862 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 17:54:48,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 17:54:48,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-02 17:54:48,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-05-02 17:54:48,864 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2021-05-02 17:54:48,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:54:48,864 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-05-02 17:54:48,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:48,864 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-05-02 17:54:48,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 17:54:48,864 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:54:48,864 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:54:48,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 17:54:48,865 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:54:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:54:48,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1982267804, now seen corresponding path program 1 times [2021-05-02 17:54:48,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:54:48,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854452393] [2021-05-02 17:54:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:54:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:48,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:54:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:54:48,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:54:48,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854452393] [2021-05-02 17:54:48,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854452393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:48,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68985928] [2021-05-02 17:54:48,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:54:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:49,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 17:54:49,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:54:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:54:49,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68985928] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:49,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:54:49,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 17:54:49,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545473591] [2021-05-02 17:54:49,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:54:49,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:54:49,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:54:49,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:54:49,076 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:49,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:54:49,157 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-05-02 17:54:49,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 17:54:49,158 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 17:54:49,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:54:49,158 INFO L225 Difference]: With dead ends: 23 [2021-05-02 17:54:49,159 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 17:54:49,159 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:54:49,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 17:54:49,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-05-02 17:54:49,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-05-02 17:54:49,161 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2021-05-02 17:54:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:54:49,161 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-05-02 17:54:49,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:49,162 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-05-02 17:54:49,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 17:54:49,162 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:54:49,162 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:54:49,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:54:49,377 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:54:49,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:54:49,377 INFO L82 PathProgramCache]: Analyzing trace with hash 162353148, now seen corresponding path program 2 times [2021-05-02 17:54:49,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:54:49,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913323462] [2021-05-02 17:54:49,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:54:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:49,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:54:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 17:54:49,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:54:49,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913323462] [2021-05-02 17:54:49,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913323462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:49,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968318171] [2021-05-02 17:54:49,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:54:49,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:54:49,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:54:49,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 17:54:49,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:54:49,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 17:54:49,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968318171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:49,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:54:49,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 17:54:49,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825127790] [2021-05-02 17:54:49,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:54:49,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:54:49,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:54:49,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:54:49,541 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:49,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:54:49,644 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-05-02 17:54:49,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:54:49,645 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-02 17:54:49,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:54:49,645 INFO L225 Difference]: With dead ends: 27 [2021-05-02 17:54:49,645 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 17:54:49,646 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:54:49,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 17:54:49,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-05-02 17:54:49,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 17:54:49,648 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2021-05-02 17:54:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:54:49,648 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 17:54:49,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:49,648 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 17:54:49,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 17:54:49,650 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:54:49,650 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:54:49,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:54:49,851 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:54:49,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:54:49,851 INFO L82 PathProgramCache]: Analyzing trace with hash -45148780, now seen corresponding path program 3 times [2021-05-02 17:54:49,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:54:49,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067745396] [2021-05-02 17:54:49,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:54:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:49,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:54:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 17:54:49,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:54:49,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067745396] [2021-05-02 17:54:49,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067745396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:49,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148449029] [2021-05-02 17:54:49,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:54:50,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 17:54:50,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:54:50,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 17:54:50,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:54:50,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:50,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-05-02 17:54:50,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148449029] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:54:50,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:54:50,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-05-02 17:54:50,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844133509] [2021-05-02 17:54:50,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:54:50,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:54:50,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:54:50,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:54:50,182 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:50,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:54:50,277 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-05-02 17:54:50,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:54:50,277 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 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 23 [2021-05-02 17:54:50,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:54:50,277 INFO L225 Difference]: With dead ends: 22 [2021-05-02 17:54:50,277 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 17:54:50,278 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-02 17:54:50,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 17:54:50,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 17:54:50,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 17:54:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 17:54:50,278 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-05-02 17:54:50,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:54:50,278 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 17:54:50,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:50,279 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 17:54:50,279 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 17:54:50,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:54:50,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:54:50 BasicIcfg [2021-05-02 17:54:50,482 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:54:50,483 INFO L168 Benchmark]: Toolchain (without parser) took 9793.01 ms. Allocated memory is still 176.2 MB. Free memory was 140.2 MB in the beginning and 103.6 MB in the end (delta: 36.7 MB). Peak memory consumption was 37.6 MB. Max. memory is 8.0 GB. [2021-05-02 17:54:50,483 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 176.2 MB. Free memory is still 157.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:54:50,483 INFO L168 Benchmark]: CACSL2BoogieTranslator took 124.78 ms. Allocated memory is still 176.2 MB. Free memory was 140.2 MB in the beginning and 130.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 17:54:50,483 INFO L168 Benchmark]: Boogie Preprocessor took 17.73 ms. Allocated memory is still 176.2 MB. Free memory was 130.3 MB in the beginning and 128.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 17:54:50,483 INFO L168 Benchmark]: RCFGBuilder took 317.01 ms. Allocated memory is still 176.2 MB. Free memory was 128.7 MB in the beginning and 146.4 MB in the end (delta: -17.7 MB). Peak memory consumption was 3.8 MB. Max. memory is 8.0 GB. [2021-05-02 17:54:50,483 INFO L168 Benchmark]: IcfgTransformer took 7167.00 ms. Allocated memory is still 176.2 MB. Free memory was 146.4 MB in the beginning and 132.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 17:54:50,483 INFO L168 Benchmark]: TraceAbstraction took 2156.42 ms. Allocated memory is still 176.2 MB. Free memory was 132.2 MB in the beginning and 103.6 MB in the end (delta: 28.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 8.0 GB. [2021-05-02 17:54:50,484 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 176.2 MB. Free memory is still 157.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 124.78 ms. Allocated memory is still 176.2 MB. Free memory was 140.2 MB in the beginning and 130.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.73 ms. Allocated memory is still 176.2 MB. Free memory was 130.3 MB in the beginning and 128.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 317.01 ms. Allocated memory is still 176.2 MB. Free memory was 128.7 MB in the beginning and 146.4 MB in the end (delta: -17.7 MB). Peak memory consumption was 3.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 7167.00 ms. Allocated memory is still 176.2 MB. Free memory was 146.4 MB in the beginning and 132.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2156.42 ms. Allocated memory is still 176.2 MB. Free memory was 132.2 MB in the beginning and 103.6 MB in the end (delta: 28.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2121.9ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 15.5ms, AutomataDifference: 439.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 76 SDtfs, 93 SDslu, 96 SDs, 0 SdLazy, 161 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 146.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 494.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=5, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 18.8ms AutomataMinimizationTime, 6 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 27.6ms SsaConstructionTime, 149.3ms SatisfiabilityAnalysisTime, 685.2ms InterpolantComputationTime, 150 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 141 ConstructedInterpolants, 0 QuantifiedInterpolants, 615 SizeOfPredicates, 4 NumberOfNonLiveVariables, 296 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 34/73 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...