/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/benchmark23_conjunctive.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:09:21,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:09:21,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:09:21,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:09:21,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:09:21,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:09:22,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:09:22,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:09:22,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:09:22,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:09:22,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:09:22,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:09:22,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:09:22,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:09:22,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:09:22,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:09:22,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:09:22,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:09:22,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:09:22,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:09:22,058 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:09:22,059 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:09:22,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:09:22,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:09:22,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:09:22,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:09:22,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:09:22,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:09:22,100 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:09:22,115 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:09:22,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:09:22,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:09:22,117 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:09:22,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:09:22,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:09:22,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:09:22,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:09:22,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:09:22,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:09:22,118 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:09:22,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:09:22,119 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:09:22,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:09:22,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:09:22,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:09:22,119 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:09:22,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:09:22,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:09:22,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:09:22,120 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:09:22,123 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:09:22,124 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:09:22,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:09:22,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:09:22,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:09:22,421 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:09:22,422 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:09:22,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark23_conjunctive.i [2021-05-02 19:09:22,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f83c73490/531289a15d834e40ab134d23574e2f3a/FLAGd00faa0ff [2021-05-02 19:09:22,807 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:09:22,807 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark23_conjunctive.i [2021-05-02 19:09:22,812 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f83c73490/531289a15d834e40ab134d23574e2f3a/FLAGd00faa0ff [2021-05-02 19:09:23,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f83c73490/531289a15d834e40ab134d23574e2f3a [2021-05-02 19:09:23,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:09:23,248 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:09:23,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:09:23,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:09:23,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:09:23,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:09:23" (1/1) ... [2021-05-02 19:09:23,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c33fd0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:09:23, skipping insertion in model container [2021-05-02 19:09:23,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:09:23" (1/1) ... [2021-05-02 19:09:23,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:09:23,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:09:23,403 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/benchmark23_conjunctive.i[873,886] [2021-05-02 19:09:23,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:09:23,422 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:09:23,479 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/benchmark23_conjunctive.i[873,886] [2021-05-02 19:09:23,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:09:23,492 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:09:23,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:09:23 WrapperNode [2021-05-02 19:09:23,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:09:23,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:09:23,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:09:23,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:09:23,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:09:23" (1/1) ... [2021-05-02 19:09:23,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:09:23" (1/1) ... [2021-05-02 19:09:23,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:09:23" (1/1) ... [2021-05-02 19:09:23,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:09:23" (1/1) ... [2021-05-02 19:09:23,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:09:23" (1/1) ... [2021-05-02 19:09:23,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:09:23" (1/1) ... [2021-05-02 19:09:23,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:09:23" (1/1) ... [2021-05-02 19:09:23,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:09:23,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:09:23,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:09:23,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:09:23,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:09:23" (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 19:09:23,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:09:23,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:09:23,678 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:09:23,678 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:09:23,678 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:09:23,679 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:09:23,679 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 19:09:23,679 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 19:09:23,679 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:09:23,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:09:23,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:09:23,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-02 19:09:23,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:09:23,680 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:09:23,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:09:23,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:09:23,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:09:23,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:09:23,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:09:23,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:09:23,835 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:09:23,835 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:09:23,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:09:23 BoogieIcfgContainer [2021-05-02 19:09:23,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:09:23,854 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:09:23,854 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:09:23,855 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:09:23,856 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:09:23" (1/1) ... [2021-05-02 19:09:23,922 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3 100) InVars {main_~i~0=v_main_~i~0_3} OutVars{main_~i~0=v_main_~i~0_3} AuxVars[] AssignedVars[] [2021-05-02 19:09:23,966 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.3 percent of original size [2021-05-02 19:09:24,060 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.3 percent of original size 56 [2021-05-02 19:09:24,096 INFO L1112 elerationTransformer]: Accelerated Formula: (and (= (+ v_main_~i~0_3 1) v_main_~i~0_2) (< v_main_~i~0_3 100) (= v_main_~j~0_1 (+ v_main_~j~0_2 2))) InVars {main_~j~0=v_main_~j~0_2, main_~i~0=v_main_~i~0_3} OutVars{main_~j~0=v_main_~j~0_1, main_~i~0=v_main_~i~0_2, main_#t~post5=|v_main_#t~post5_1|} AuxVars[] AssignedVars[main_~j~0, main_~i~0, main_#t~post5] with Formula: (or (and (<= 100 v_main_~i~0_3) (= v_itFin_1 0) (= v_main_~i~0_3 v_main_~i~0_2) (= v_main_~j~0_2 v_main_~j~0_1) (= |v_main_#t~post5_3| |v_main_#t~post5_1|)) (let ((.cse0 (+ v_itFin_1 v_main_~i~0_3))) (and (= v_main_~j~0_1 (+ (* 2 v_itFin_1) v_main_~j~0_2)) (= v_main_~i~0_2 .cse0) (< v_main_~i~0_3 100) (< .cse0 101) (<= 100 .cse0)))) InVars {main_~i~0=v_main_~i~0_3, main_#t~post5=|v_main_#t~post5_3|, main_~j~0=v_main_~j~0_2} OutVars{main_~i~0=v_main_~i~0_2, main_#t~post5=|v_main_#t~post5_1|, main_~j~0=v_main_~j~0_1} AuxVars[v_itFin_1] AssignedVars[main_~j~0, main_~i~0, main_#t~post5] [2021-05-02 19:09:24,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:09:24 BasicIcfg [2021-05-02 19:09:24,102 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:09:24,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:09:24,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:09:24,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:09:24,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:09:23" (1/4) ... [2021-05-02 19:09:24,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@425f6a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:09:24, skipping insertion in model container [2021-05-02 19:09:24,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:09:23" (2/4) ... [2021-05-02 19:09:24,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@425f6a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:09:24, skipping insertion in model container [2021-05-02 19:09:24,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:09:23" (3/4) ... [2021-05-02 19:09:24,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@425f6a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:09:24, skipping insertion in model container [2021-05-02 19:09:24,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:09:24" (4/4) ... [2021-05-02 19:09:24,107 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark23_conjunctive.iJordan [2021-05-02 19:09:24,113 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:09:24,116 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:09:24,126 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:09:24,145 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:09:24,145 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:09:24,145 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:09:24,145 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:09:24,145 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:09:24,146 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:09:24,146 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:09:24,146 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:09:24,160 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 19:09:24,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:09:24,166 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:09:24,166 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:09:24,166 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:09:24,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:09:24,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1809217115, now seen corresponding path program 1 times [2021-05-02 19:09:24,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:09:24,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634762528] [2021-05-02 19:09:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:09:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:09:24,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:09:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:09:24,281 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 19:09:24,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:09:24,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634762528] [2021-05-02 19:09:24,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634762528] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:09:24,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:09:24,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:09:24,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282985660] [2021-05-02 19:09:24,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:09:24,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:09:24,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:09:24,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:09:24,295 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 19:09:24,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:09:24,319 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-05-02 19:09:24,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:09:24,321 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 19:09:24,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:09:24,325 INFO L225 Difference]: With dead ends: 20 [2021-05-02 19:09:24,325 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 19:09:24,326 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:09:24,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 19:09:24,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-02 19:09:24,343 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 19:09:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-02 19:09:24,344 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2021-05-02 19:09:24,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:09:24,344 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-02 19:09:24,344 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 19:09:24,344 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-02 19:09:24,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:09:24,345 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:09:24,345 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:09:24,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:09:24,345 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:09:24,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:09:24,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1810140636, now seen corresponding path program 1 times [2021-05-02 19:09:24,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:09:24,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146596532] [2021-05-02 19:09:24,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:09:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:09:24,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:09:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:09:24,423 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 19:09:24,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:09:24,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146596532] [2021-05-02 19:09:24,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146596532] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:09:24,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:09:24,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 19:09:24,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371055614] [2021-05-02 19:09:24,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 19:09:24,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:09:24,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 19:09:24,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:09:24,426 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 19:09:24,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:09:24,457 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-05-02 19:09:24,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 19:09:24,458 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 19:09:24,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:09:24,458 INFO L225 Difference]: With dead ends: 14 [2021-05-02 19:09:24,458 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 19:09:24,459 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:09:24,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 19:09:24,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 19:09:24,460 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 19:09:24,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 19:09:24,461 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 19:09:24,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:09:24,461 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 19:09:24,461 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 19:09:24,462 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 19:09:24,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 19:09:24,462 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:09:24,462 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:09:24,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 19:09:24,462 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:09:24,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:09:24,463 INFO L82 PathProgramCache]: Analyzing trace with hash 306506437, now seen corresponding path program 1 times [2021-05-02 19:09:24,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:09:24,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796995005] [2021-05-02 19:09:24,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:09:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:09:24,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:09:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:09:24,543 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 19:09:24,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:09:24,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796995005] [2021-05-02 19:09:24,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796995005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:09:24,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31972192] [2021-05-02 19:09:24,544 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 19:09:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:09:24,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 19:09:24,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:09:24,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:09:24,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:09:24,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:09:24,782 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 19:09:24,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31972192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:09:24,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:09:24,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-02 19:09:24,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851926490] [2021-05-02 19:09:24,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:09:24,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:09:24,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:09:24,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:09:24,784 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 19:09:24,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:09:24,882 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-05-02 19:09:24,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:09:24,882 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 19:09:24,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:09:24,883 INFO L225 Difference]: With dead ends: 18 [2021-05-02 19:09:24,883 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 19:09:24,883 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:09:24,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 19:09:24,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 19:09:24,885 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 19:09:24,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 19:09:24,885 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-05-02 19:09:24,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:09:24,885 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 19:09:24,885 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 19:09:24,885 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 19:09:24,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 19:09:24,886 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:09:24,886 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:09:25,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 19:09:25,107 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:09:25,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:09:25,108 INFO L82 PathProgramCache]: Analyzing trace with hash 938486524, now seen corresponding path program 2 times [2021-05-02 19:09:25,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:09:25,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739016492] [2021-05-02 19:09:25,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:09:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:09:25,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:09:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:09:25,187 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 19:09:25,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:09:25,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739016492] [2021-05-02 19:09:25,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739016492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:09:25,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543794768] [2021-05-02 19:09:25,188 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 19:09:25,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:09:25,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:09:25,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 19:09:25,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:09:25,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:09:25,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:09:25,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:09:25,339 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 19:09:25,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543794768] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:09:25,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:09:25,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-02 19:09:25,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347518809] [2021-05-02 19:09:25,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:09:25,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:09:25,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:09:25,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:09:25,341 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 19:09:25,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:09:25,425 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-05-02 19:09:25,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:09:25,425 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 19:09:25,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:09:25,426 INFO L225 Difference]: With dead ends: 13 [2021-05-02 19:09:25,426 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:09:25,426 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:09:25,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:09:25,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:09:25,426 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 19:09:25,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:09:25,427 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-05-02 19:09:25,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:09:25,427 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:09:25,427 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 19:09:25,427 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:09:25,427 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:09:25,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:09:25,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:09:25 BasicIcfg [2021-05-02 19:09:25,646 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:09:25,646 INFO L168 Benchmark]: Toolchain (without parser) took 2398.29 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 131.0 MB in the beginning and 126.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 39.2 MB. Max. memory is 8.0 GB. [2021-05-02 19:09:25,646 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 166.7 MB. Free memory is still 147.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:09:25,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.57 ms. Allocated memory is still 166.7 MB. Free memory was 130.8 MB in the beginning and 148.8 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-05-02 19:09:25,647 INFO L168 Benchmark]: Boogie Preprocessor took 39.51 ms. Allocated memory is still 166.7 MB. Free memory was 148.8 MB in the beginning and 147.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:09:25,647 INFO L168 Benchmark]: RCFGBuilder took 318.04 ms. Allocated memory is still 166.7 MB. Free memory was 147.2 MB in the beginning and 133.5 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 19:09:25,647 INFO L168 Benchmark]: IcfgTransformer took 248.18 ms. Allocated memory is still 166.7 MB. Free memory was 133.5 MB in the beginning and 119.6 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 19:09:25,647 INFO L168 Benchmark]: TraceAbstraction took 1542.29 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 119.3 MB in the beginning and 126.8 MB in the end (delta: -7.5 MB). Peak memory consumption was 28.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:09:25,648 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from IcfgTransformer: - StatisticsResult: Jordan loop acceleration statistics 1 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 0.47 ms. Allocated memory is still 166.7 MB. Free memory is still 147.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 242.57 ms. Allocated memory is still 166.7 MB. Free memory was 130.8 MB in the beginning and 148.8 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.51 ms. Allocated memory is still 166.7 MB. Free memory was 148.8 MB in the beginning and 147.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 318.04 ms. Allocated memory is still 166.7 MB. Free memory was 147.2 MB in the beginning and 133.5 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 248.18 ms. Allocated memory is still 166.7 MB. Free memory was 133.5 MB in the beginning and 119.6 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1542.29 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 119.3 MB in the beginning and 126.8 MB in the end (delta: -7.5 MB). Peak memory consumption was 28.1 MB. 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: 1500.0ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 12.8ms, AutomataDifference: 258.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 46 SDtfs, 37 SDslu, 77 SDs, 0 SdLazy, 114 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 66.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 332.4ms 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: 14.1ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 20.4ms SsaConstructionTime, 78.7ms SatisfiabilityAnalysisTime, 444.8ms InterpolantComputationTime, 78 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 72 ConstructedInterpolants, 0 QuantifiedInterpolants, 296 SizeOfPredicates, 4 NumberOfNonLiveVariables, 165 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...