/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-zilu/benchmark04_conjunctive.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:07:26,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:07:26,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:07:26,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:07:26,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:07:26,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:07:26,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:07:26,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:07:26,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:07:26,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:07:26,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:07:26,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:07:26,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:07:26,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:07:26,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:07:26,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:07:26,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:07:26,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:07:26,409 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:07:26,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:07:26,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:07:26,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:07:26,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:07:26,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:07:26,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:07:26,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:07:26,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:07:26,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:07:26,432 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:07:26,445 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:07:26,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:07:26,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:07:26,447 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:07:26,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:07:26,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:07:26,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:07:26,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:07:26,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:07:26,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:07:26,448 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:07:26,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:07:26,449 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:07:26,449 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:07:26,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:07:26,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:07:26,449 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:07:26,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:07:26,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:07:26,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:07:26,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:07:26,450 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:07:26,450 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:07:26,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:07:26,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:07:26,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:07:26,740 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:07:26,740 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:07:26,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark04_conjunctive.i [2021-05-02 19:07:26,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e573c23c3/6f3d2a048a664267a137a337cd1d9d21/FLAGd7ca68cdb [2021-05-02 19:07:27,183 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:07:27,184 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark04_conjunctive.i [2021-05-02 19:07:27,188 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e573c23c3/6f3d2a048a664267a137a337cd1d9d21/FLAGd7ca68cdb [2021-05-02 19:07:27,201 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e573c23c3/6f3d2a048a664267a137a337cd1d9d21 [2021-05-02 19:07:27,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:07:27,205 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:07:27,208 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:07:27,208 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:07:27,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:07:27,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:07:27" (1/1) ... [2021-05-02 19:07:27,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@224730ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:27, skipping insertion in model container [2021-05-02 19:07:27,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:07:27" (1/1) ... [2021-05-02 19:07:27,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:07:27,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:07:27,339 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-zilu/benchmark04_conjunctive.i[873,886] [2021-05-02 19:07:27,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:07:27,354 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:07:27,372 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-zilu/benchmark04_conjunctive.i[873,886] [2021-05-02 19:07:27,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:07:27,399 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:07:27,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:27 WrapperNode [2021-05-02 19:07:27,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:07:27,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:07:27,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:07:27,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:07:27,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:27" (1/1) ... [2021-05-02 19:07:27,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:27" (1/1) ... [2021-05-02 19:07:27,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:27" (1/1) ... [2021-05-02 19:07:27,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:27" (1/1) ... [2021-05-02 19:07:27,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:27" (1/1) ... [2021-05-02 19:07:27,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:27" (1/1) ... [2021-05-02 19:07:27,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:27" (1/1) ... [2021-05-02 19:07:27,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:07:27,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:07:27,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:07:27,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:07:27,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:27" (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 19:07:27,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:07:27,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:07:27,527 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:07:27,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:07:27,527 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:07:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:07:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 19:07:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 19:07:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:07:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:07:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:07:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-02 19:07:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:07:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:07:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:07:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:07:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:07:27,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:07:27,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:07:27,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:07:27,688 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:07:27,688 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:07:27,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:07:27 BoogieIcfgContainer [2021-05-02 19:07:27,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:07:27,690 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:07:27,690 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:07:27,691 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:07:27,692 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:07:27" (1/1) ... [2021-05-02 19:07:27,728 INFO L181 rdanLoopAcceleration]: Guard: Formula: (<= (+ v_main_~j~0_3 1) v_main_~n~0_2) InVars {main_~n~0=v_main_~n~0_2, main_~j~0=v_main_~j~0_3} OutVars{main_~n~0=v_main_~n~0_2, main_~j~0=v_main_~j~0_3} AuxVars[] AssignedVars[] [2021-05-02 19:07:27,746 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 87.5 percent of original size [2021-05-02 19:07:27,820 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 87.5 percent of original size 63 [2021-05-02 19:07:27,847 INFO L1112 elerationTransformer]: Accelerated Formula: (let ((.cse0 (+ v_main_~j~0_3 1))) (and (<= .cse0 v_main_~n~0_2) (= .cse0 v_main_~j~0_2) (= v_main_~k~0_2 (+ v_main_~k~0_1 1)))) InVars {main_~k~0=v_main_~k~0_2, main_~j~0=v_main_~j~0_3, main_~n~0=v_main_~n~0_2} OutVars{main_~k~0=v_main_~k~0_1, main_~j~0=v_main_~j~0_2, main_~n~0=v_main_~n~0_2, main_#t~post6=|v_main_#t~post6_1|, main_#t~post7=|v_main_#t~post7_1|} AuxVars[] AssignedVars[main_~k~0, main_~j~0, main_#t~post6, main_#t~post7] with Formula: (let ((.cse0 (+ v_main_~j~0_3 1))) (or (let ((.cse1 (+ v_itFin_1 v_main_~j~0_3))) (and (<= .cse0 v_main_~n~0_2) (= v_main_~k~0_2 (+ v_itFin_1 v_main_~k~0_1)) (<= .cse1 v_main_~n~0_2) (= v_main_~j~0_2 .cse1) (< v_main_~n~0_2 (+ v_itFin_1 v_main_~j~0_3 1)))) (and (< v_main_~n~0_2 .cse0) (= |v_main_#t~post7_3| |v_main_#t~post7_1|) (= v_itFin_1 0) (= |v_main_#t~post6_3| |v_main_#t~post6_1|) (= v_main_~k~0_2 v_main_~k~0_1) (= v_main_~j~0_3 v_main_~j~0_2)))) InVars {main_~n~0=v_main_~n~0_2, main_~k~0=v_main_~k~0_2, main_#t~post6=|v_main_#t~post6_3|, main_~j~0=v_main_~j~0_3, main_#t~post7=|v_main_#t~post7_3|} OutVars{main_~n~0=v_main_~n~0_2, main_~k~0=v_main_~k~0_1, main_#t~post6=|v_main_#t~post6_1|, main_~j~0=v_main_~j~0_2, main_#t~post7=|v_main_#t~post7_1|} AuxVars[v_itFin_1] AssignedVars[main_~k~0, main_~j~0, main_#t~post6, main_#t~post7] [2021-05-02 19:07:27,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:07:27 BasicIcfg [2021-05-02 19:07:27,867 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:07:27,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:07:27,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:07:27,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:07:27,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:07:27" (1/4) ... [2021-05-02 19:07:27,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c129cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:07:27, skipping insertion in model container [2021-05-02 19:07:27,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:27" (2/4) ... [2021-05-02 19:07:27,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c129cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:07:27, skipping insertion in model container [2021-05-02 19:07:27,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:07:27" (3/4) ... [2021-05-02 19:07:27,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c129cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:07:27, skipping insertion in model container [2021-05-02 19:07:27,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:07:27" (4/4) ... [2021-05-02 19:07:27,872 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark04_conjunctive.iJordan [2021-05-02 19:07:27,876 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:07:27,883 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:07:27,895 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:07:27,915 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:07:27,915 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:07:27,915 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:07:27,916 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:07:27,916 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:07:27,916 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:07:27,916 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:07:27,916 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:07:27,927 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 19:07:27,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:07:27,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:07:27,933 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:07:27,933 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:07:27,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:07:27,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1809217115, now seen corresponding path program 1 times [2021-05-02 19:07:27,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:07:27,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246264244] [2021-05-02 19:07:27,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:07:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:07:28,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:07:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:07:28,132 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 19:07:28,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:07:28,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246264244] [2021-05-02 19:07:28,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246264244] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:07:28,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:07:28,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:07:28,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061206162] [2021-05-02 19:07:28,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:07:28,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:07:28,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:07:28,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:07:28,151 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:07:28,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:07:28,191 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-05-02 19:07:28,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:07:28,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 19:07:28,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:07:28,196 INFO L225 Difference]: With dead ends: 20 [2021-05-02 19:07:28,196 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 19:07:28,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:07:28,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 19:07:28,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-02 19:07:28,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 19:07:28,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-02 19:07:28,216 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2021-05-02 19:07:28,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:07:28,216 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-02 19:07:28,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:07:28,216 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-02 19:07:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:07:28,217 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:07:28,217 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:07:28,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:07:28,218 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:07:28,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:07:28,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1810140636, now seen corresponding path program 1 times [2021-05-02 19:07:28,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:07:28,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340867047] [2021-05-02 19:07:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:07:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:07:28,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:07:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:07:28,316 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 19:07:28,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:07:28,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340867047] [2021-05-02 19:07:28,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340867047] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:07:28,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:07:28,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 19:07:28,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682110436] [2021-05-02 19:07:28,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 19:07:28,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:07:28,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 19:07:28,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:07:28,319 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:07:28,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:07:28,368 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-05-02 19:07:28,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 19:07:28,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 19:07:28,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:07:28,369 INFO L225 Difference]: With dead ends: 14 [2021-05-02 19:07:28,369 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 19:07:28,370 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:07:28,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 19:07:28,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 19:07:28,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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 19:07:28,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 19:07:28,375 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 19:07:28,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:07:28,375 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 19:07:28,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:07:28,375 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 19:07:28,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 19:07:28,376 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:07:28,377 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:07:28,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 19:07:28,380 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:07:28,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:07:28,381 INFO L82 PathProgramCache]: Analyzing trace with hash 306506437, now seen corresponding path program 1 times [2021-05-02 19:07:28,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:07:28,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445945213] [2021-05-02 19:07:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:07:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:07:28,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:07:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:07:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:07:28,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:07:28,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445945213] [2021-05-02 19:07:28,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445945213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:07:28,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90327075] [2021-05-02 19:07:28,510 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 19:07:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:07:28,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 19:07:28,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:07:28,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:07:28,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:07:28,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:07:28,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:07:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:07:28,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90327075] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:07:28,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:07:28,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-02 19:07:28,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067179801] [2021-05-02 19:07:28,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:07:28,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:07:28,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:07:28,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:07:28,660 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:07:28,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:07:28,766 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-05-02 19:07:28,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:07:28,766 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 19:07:28,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:07:28,767 INFO L225 Difference]: With dead ends: 18 [2021-05-02 19:07:28,767 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 19:07:28,767 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:07:28,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 19:07:28,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 19:07:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 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 19:07:28,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 19:07:28,769 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-05-02 19:07:28,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:07:28,769 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 19:07:28,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:07:28,769 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 19:07:28,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 19:07:28,770 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:07:28,770 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:07:28,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 19:07:28,986 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:07:28,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:07:28,986 INFO L82 PathProgramCache]: Analyzing trace with hash 938486524, now seen corresponding path program 2 times [2021-05-02 19:07:28,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:07:28,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541187804] [2021-05-02 19:07:28,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:07:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:07:29,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:07:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:07:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:07:29,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:07:29,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541187804] [2021-05-02 19:07:29,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541187804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:07:29,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671261296] [2021-05-02 19:07:29,053 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 19:07:29,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:07:29,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:07:29,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 19:07:29,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:07:29,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:07:29,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:07:29,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:07:29,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:07:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:07:29,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671261296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:07:29,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:07:29,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-02 19:07:29,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042184791] [2021-05-02 19:07:29,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:07:29,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:07:29,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:07:29,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:07:29,214 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:07:29,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:07:29,320 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-05-02 19:07:29,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:07:29,320 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (5), 4 states have call predecessors, (5), 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 19:07:29,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:07:29,321 INFO L225 Difference]: With dead ends: 13 [2021-05-02 19:07:29,321 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:07:29,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:07:29,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:07:29,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:07:29,321 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 19:07:29,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:07:29,321 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-05-02 19:07:29,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:07:29,322 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:07:29,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:07:29,322 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:07:29,322 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:07:29,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:07:29,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:07:29 BasicIcfg [2021-05-02 19:07:29,540 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:07:29,541 INFO L168 Benchmark]: Toolchain (without parser) took 2336.56 ms. Allocated memory was 192.9 MB in the beginning and 231.7 MB in the end (delta: 38.8 MB). Free memory was 157.1 MB in the beginning and 183.1 MB in the end (delta: -26.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2021-05-02 19:07:29,541 INFO L168 Benchmark]: CDTParser took 0.08 ms. Allocated memory is still 192.9 MB. Free memory is still 174.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:07:29,541 INFO L168 Benchmark]: CACSL2BoogieTranslator took 191.47 ms. Allocated memory is still 192.9 MB. Free memory was 156.9 MB in the beginning and 175.7 MB in the end (delta: -18.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 19:07:29,543 INFO L168 Benchmark]: Boogie Preprocessor took 31.08 ms. Allocated memory is still 192.9 MB. Free memory was 175.7 MB in the beginning and 174.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:07:29,544 INFO L168 Benchmark]: RCFGBuilder took 257.14 ms. Allocated memory is still 192.9 MB. Free memory was 174.3 MB in the beginning and 160.7 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 19:07:29,544 INFO L168 Benchmark]: IcfgTransformer took 177.37 ms. Allocated memory is still 192.9 MB. Free memory was 160.7 MB in the beginning and 144.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 19:07:29,546 INFO L168 Benchmark]: TraceAbstraction took 1672.22 ms. Allocated memory was 192.9 MB in the beginning and 231.7 MB in the end (delta: 38.8 MB). Free memory was 144.2 MB in the beginning and 183.1 MB in the end (delta: -38.9 MB). Peak memory consumption was 947.8 kB. Max. memory is 8.0 GB. [2021-05-02 19:07:29,548 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from IcfgTransformer: - StatisticsResult: Jordan loop acceleration statistics 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=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 0.08 ms. Allocated memory is still 192.9 MB. Free memory is still 174.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 191.47 ms. Allocated memory is still 192.9 MB. Free memory was 156.9 MB in the beginning and 175.7 MB in the end (delta: -18.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.08 ms. Allocated memory is still 192.9 MB. Free memory was 175.7 MB in the beginning and 174.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 257.14 ms. Allocated memory is still 192.9 MB. Free memory was 174.3 MB in the beginning and 160.7 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 177.37 ms. Allocated memory is still 192.9 MB. Free memory was 160.7 MB in the beginning and 144.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1672.22 ms. Allocated memory was 192.9 MB in the beginning and 231.7 MB in the end (delta: 38.8 MB). Free memory was 144.2 MB in the beginning and 183.1 MB in the end (delta: -38.9 MB). Peak memory consumption was 947.8 kB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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: 1624.1ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 10.2ms, AutomataDifference: 325.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 46 SDtfs, 37 SDslu, 77 SDs, 0 SdLazy, 105 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 80.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 375.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 17.9ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 40.5ms SsaConstructionTime, 98.0ms SatisfiabilityAnalysisTime, 499.0ms InterpolantComputationTime, 78 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 72 ConstructedInterpolants, 0 QuantifiedInterpolants, 270 SizeOfPredicates, 8 NumberOfNonLiveVariables, 173 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 0/8 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...