/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-invgen/half_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:52:56,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:52:56,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:52:56,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 05:52:56,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 05:52:56,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 05:52:56,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 05:52:56,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 05:52:56,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 05:52:56,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 05:52:56,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 05:52:56,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 05:52:56,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 05:52:56,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 05:52:56,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 05:52:56,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 05:52:56,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 05:52:56,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 05:52:56,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 05:52:56,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 05:52:56,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 05:52:56,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 05:52:56,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 05:52:56,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 05:52:56,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 05:52:56,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:52:56,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:52:56,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:52:56,441 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 05:52:56,456 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:52:56,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:52:56,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:52:56,457 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:52:56,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:52:56,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:52:56,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:52:56,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:52:56,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:52:56,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:52:56,458 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:52:56,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:52:56,458 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:52:56,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:52:56,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:52:56,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:52:56,459 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 05:52:56,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:52:56,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:52:56,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:52:56,459 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:52:56,460 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 05:52:56,460 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:52:56,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:52:56,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:52:56,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:52:56,784 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:52:56,784 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:52:56,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/half_2.i [2021-05-06 05:52:56,833 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/debe34e7b/3d4e8fe57fc348b0b5b23579f13314bb/FLAG23f8962ff [2021-05-06 05:52:57,236 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:52:57,237 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/half_2.i [2021-05-06 05:52:57,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/debe34e7b/3d4e8fe57fc348b0b5b23579f13314bb/FLAG23f8962ff [2021-05-06 05:52:57,626 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/debe34e7b/3d4e8fe57fc348b0b5b23579f13314bb [2021-05-06 05:52:57,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:52:57,631 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 05:52:57,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:52:57,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:52:57,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:52:57,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:52:57" (1/1) ... [2021-05-06 05:52:57,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66a5a33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:57, skipping insertion in model container [2021-05-06 05:52:57,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:52:57" (1/1) ... [2021-05-06 05:52:57,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:52:57,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:52:57,817 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/half_2.i[893,906] [2021-05-06 05:52:57,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:52:57,851 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:52:57,867 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/half_2.i[893,906] [2021-05-06 05:52:57,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:52:57,904 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:52:57,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:57 WrapperNode [2021-05-06 05:52:57,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:52:57,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:52:57,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:52:57,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:52:57,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:57" (1/1) ... [2021-05-06 05:52:57,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:57" (1/1) ... [2021-05-06 05:52:57,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:57" (1/1) ... [2021-05-06 05:52:57,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:57" (1/1) ... [2021-05-06 05:52:57,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:57" (1/1) ... [2021-05-06 05:52:57,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:57" (1/1) ... [2021-05-06 05:52:57,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:57" (1/1) ... [2021-05-06 05:52:57,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:52:57,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:52:57,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:52:57,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:52:57,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:57" (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 05:52:57,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:52:57,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:52:57,994 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:52:57,994 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 05:52:57,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 05:52:57,995 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:52:57,995 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:52:57,995 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:52:57,995 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 05:52:57,995 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 05:52:57,995 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:52:57,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:52:57,995 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 05:52:57,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:52:57,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 05:52:57,996 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:52:57,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:52:57,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:52:57,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:52:57,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:52:57,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:52:57,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:52:58,198 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:52:58,198 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 05:52:58,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:52:58 BoogieIcfgContainer [2021-05-06 05:52:58,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:52:58,200 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 05:52:58,200 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 05:52:58,201 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 05:52:58,203 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:52:58" (1/1) ... [2021-05-06 05:52:58,270 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 86.9 percent of original size [2021-05-06 05:52:58,376 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 86.9 percent of original size 53 [2021-05-06 05:52:58,464 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 05:52:58,465 INFO L91 elerationTransformer]: Accelerated Formula: (and (= v_main_~i~0_4 (+ v_main_~i~0_5 2)) (= (+ v_main_~k~0_6 1) v_main_~k~0_7) (< v_main_~i~0_5 v_main_~n~0_9)) InVars {main_~k~0=v_main_~k~0_7, main_~i~0=v_main_~i~0_5, main_~n~0=v_main_~n~0_9} OutVars{main_~k~0=v_main_~k~0_6, main_~i~0=v_main_~i~0_4, main_#t~post4=|v_main_#t~post4_1|, main_~n~0=v_main_~n~0_9} AuxVars[] AssignedVars[main_~k~0, main_~i~0, main_#t~post4] to Formula: (or (and (< 0 v_itFin_1) (= v_main_~i~0_4 (+ (* v_itFin_1 2) v_main_~i~0_5)) (= v_main_~k~0_7 (+ v_itFin_1 v_main_~k~0_6)) (< v_itFin_1 (+ (div (+ (* v_main_~i~0_5 (- 1)) v_main_~n~0_9 (- 1)) 2) 2))) (and (= v_itFin_1 0) (= v_main_~k~0_7 v_main_~k~0_6) (<= v_main_~n~0_9 v_main_~i~0_5) (= |v_main_#t~post4_3| |v_main_#t~post4_1|) (= v_main_~i~0_4 v_main_~i~0_5))) InVars {main_~i~0=v_main_~i~0_5, main_#t~post4=|v_main_#t~post4_3|, main_~n~0=v_main_~n~0_9, main_~k~0=v_main_~k~0_7} OutVars{main_~i~0=v_main_~i~0_4, main_#t~post4=|v_main_#t~post4_1|, main_~n~0=v_main_~n~0_9, main_~k~0=v_main_~k~0_6} AuxVars[v_itFin_1] AssignedVars[main_~k~0, main_~i~0, main_#t~post4] [2021-05-06 05:52:58,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 05:52:58 BasicIcfg [2021-05-06 05:52:58,471 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 05:52:58,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:52:58,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:52:58,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:52:58,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:52:57" (1/4) ... [2021-05-06 05:52:58,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ccc1d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:52:58, skipping insertion in model container [2021-05-06 05:52:58,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:57" (2/4) ... [2021-05-06 05:52:58,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ccc1d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:52:58, skipping insertion in model container [2021-05-06 05:52:58,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:52:58" (3/4) ... [2021-05-06 05:52:58,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ccc1d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:52:58, skipping insertion in model container [2021-05-06 05:52:58,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 05:52:58" (4/4) ... [2021-05-06 05:52:58,484 INFO L111 eAbstractionObserver]: Analyzing ICFG half_2.iJordan [2021-05-06 05:52:58,490 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:52:58,493 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 05:52:58,509 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 05:52:58,525 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:52:58,525 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 05:52:58,525 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 05:52:58,525 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:52:58,525 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:52:58,526 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:52:58,526 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:52:58,526 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:52:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 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) [2021-05-06 05:52:58,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 05:52:58,542 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:52:58,543 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:52:58,543 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:52:58,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:52:58,548 INFO L82 PathProgramCache]: Analyzing trace with hash 101012931, now seen corresponding path program 1 times [2021-05-06 05:52:58,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:52:58,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984800651] [2021-05-06 05:52:58,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:52:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:58,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:52:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:58,758 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 05:52:58,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:52:58,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984800651] [2021-05-06 05:52:58,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984800651] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:52:58,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:52:58,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 05:52:58,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134772748] [2021-05-06 05:52:58,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 05:52:58,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:52:58,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 05:52:58,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:52:58,787 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2021-05-06 05:52:58,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:52:58,830 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-05-06 05:52:58,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 05:52:58,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 [2021-05-06 05:52:58,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:52:58,837 INFO L225 Difference]: With dead ends: 23 [2021-05-06 05:52:58,838 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 05:52:58,839 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:52:58,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 05:52:58,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-06 05:52:58,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 05:52:58,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-05-06 05:52:58,865 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2021-05-06 05:52:58,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:52:58,865 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-05-06 05:52:58,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2021-05-06 05:52:58,866 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-05-06 05:52:58,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 05:52:58,867 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:52:58,867 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:52:58,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:52:58,867 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:52:58,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:52:58,868 INFO L82 PathProgramCache]: Analyzing trace with hash 988516612, now seen corresponding path program 1 times [2021-05-06 05:52:58,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:52:58,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278674349] [2021-05-06 05:52:58,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:52:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:59,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:52:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:59,039 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 05:52:59,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:52:59,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278674349] [2021-05-06 05:52:59,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278674349] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:52:59,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:52:59,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 05:52:59,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060015383] [2021-05-06 05:52:59,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:52:59,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:52:59,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:52:59,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:52:59,044 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2021-05-06 05:52:59,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:52:59,187 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-05-06 05:52:59,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:52:59,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 [2021-05-06 05:52:59,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:52:59,189 INFO L225 Difference]: With dead ends: 21 [2021-05-06 05:52:59,189 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 05:52:59,190 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:52:59,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 05:52:59,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 05:52:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 05:52:59,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-05-06 05:52:59,196 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2021-05-06 05:52:59,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:52:59,196 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-05-06 05:52:59,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2021-05-06 05:52:59,197 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-05-06 05:52:59,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 05:52:59,200 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:52:59,201 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:52:59,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 05:52:59,201 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:52:59,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:52:59,206 INFO L82 PathProgramCache]: Analyzing trace with hash 459251866, now seen corresponding path program 1 times [2021-05-06 05:52:59,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:52:59,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185334748] [2021-05-06 05:52:59,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:52:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:59,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:52:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:52:59,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:52:59,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185334748] [2021-05-06 05:52:59,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185334748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:52:59,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117334052] [2021-05-06 05:52:59,422 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 [2021-05-06 05:52:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:59,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 05:52:59,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:52:59,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:59,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:59,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:59,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:59,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:59,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:59,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:59,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:59,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:59,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:59,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:59,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:59,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:59,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:59,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:59,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:00,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:00,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:04,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:05,170 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 1600 DAG size of output: 1593 [2021-05-06 05:53:05,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:09,282 WARN L205 SmtUtils]: Spent 3.87 s on a formula simplification. DAG size of input: 4485 DAG size of output: 1540 [2021-05-06 05:53:09,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:13,271 WARN L205 SmtUtils]: Spent 3.59 s on a formula simplification. DAG size of input: 4354 DAG size of output: 1469 [2021-05-06 05:53:13,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:54:00,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:56:10,091 WARN L205 SmtUtils]: Spent 2.16 m on a formula simplification. DAG size of input: 26231 DAG size of output: 10723 [2021-05-06 05:56:10,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:56:10,970 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 2673 DAG size of output: 1779