/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-lit/hhk2008.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:20:43,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:20:43,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:20:43,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:20:43,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:20:43,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:20:43,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:20:43,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:20:43,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:20:43,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:20:43,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:20:43,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 18:20:43,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 18:20:43,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 18:20:43,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 18:20:43,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 18:20:43,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 18:20:43,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 18:20:43,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 18:20:43,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 18:20:43,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 18:20:43,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 18:20:43,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 18:20:43,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 18:20:43,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 18:20:43,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:20:43,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:20:43,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:20:43,892 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:20:43,905 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:20:43,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:20:43,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:20:43,908 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:20:43,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:20:43,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:20:43,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:20:43,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:20:43,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:20:43,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:20:43,909 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:20:43,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:20:43,909 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:20:43,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:20:43,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:20:43,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:20:43,909 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:20:43,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:20:43,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:20:43,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:20:43,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:20:43,911 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:20:43,911 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:20:44,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:20:44,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:20:44,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:20:44,172 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:20:44,173 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:20:44,173 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/hhk2008.i [2021-05-02 18:20:44,221 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56abf6e8a/f8feb0efa8b7447baa6f0581d89aa555/FLAG2afa3ca74 [2021-05-02 18:20:44,602 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:20:44,602 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/hhk2008.i [2021-05-02 18:20:44,606 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56abf6e8a/f8feb0efa8b7447baa6f0581d89aa555/FLAG2afa3ca74 [2021-05-02 18:20:44,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56abf6e8a/f8feb0efa8b7447baa6f0581d89aa555 [2021-05-02 18:20:44,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:20:44,627 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:20:44,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:20:44,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:20:44,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:20:44,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:20:44" (1/1) ... [2021-05-02 18:20:44,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e4c2163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:20:44, skipping insertion in model container [2021-05-02 18:20:44,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:20:44" (1/1) ... [2021-05-02 18:20:44,638 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:20:44,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:20:44,775 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-lit/hhk2008.i[895,908] [2021-05-02 18:20:44,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:20:44,792 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:20:44,801 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-lit/hhk2008.i[895,908] [2021-05-02 18:20:44,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:20:44,818 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:20:44,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:20:44 WrapperNode [2021-05-02 18:20:44,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:20:44,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:20:44,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:20:44,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:20:44,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:20:44" (1/1) ... [2021-05-02 18:20:44,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:20:44" (1/1) ... [2021-05-02 18:20:44,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:20:44" (1/1) ... [2021-05-02 18:20:44,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:20:44" (1/1) ... [2021-05-02 18:20:44,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:20:44" (1/1) ... [2021-05-02 18:20:44,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:20:44" (1/1) ... [2021-05-02 18:20:44,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:20:44" (1/1) ... [2021-05-02 18:20:44,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:20:44,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:20:44,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:20:44,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:20:44,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:20:44" (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 18:20:44,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:20:44,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:20:44,939 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:20:44,939 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:20:44,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:20:44,939 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:20:44,939 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:20:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:20:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 18:20:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 18:20:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:20:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:20:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:20:44,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:20:44,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 18:20:44,941 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:20:44,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:20:44,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:20:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:20:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:20:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:20:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:20:45,143 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:20:45,143 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 18:20:45,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:20:45 BoogieIcfgContainer [2021-05-02 18:20:45,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:20:45,145 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:20:45,145 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:20:45,145 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:20:45,147 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:20:45" (1/1) ... [2021-05-02 18:20:45,186 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~cnt~0_2) InVars {main_~cnt~0=v_main_~cnt~0_2} OutVars{main_~cnt~0=v_main_~cnt~0_2} AuxVars[] AssignedVars[] [2021-05-02 18:20:45,200 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 88.7 percent of original size [2021-05-02 18:20:45,245 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 88.7 percent of original size 47 [2021-05-02 18:20:45,266 INFO L1112 elerationTransformer]: Accelerated Formula: (and (= v_main_~res~0_1 (+ v_main_~res~0_2 1)) (< 0 v_main_~cnt~0_2) (= v_main_~cnt~0_1 (+ v_main_~cnt~0_2 (- 1)))) InVars {main_~res~0=v_main_~res~0_2, main_~cnt~0=v_main_~cnt~0_2} OutVars{main_~res~0=v_main_~res~0_1, main_~cnt~0=v_main_~cnt~0_1} AuxVars[] AssignedVars[main_~res~0, main_~cnt~0] with Formula: (or (and (= v_itFin_1 0) (= v_main_~res~0_2 v_main_~res~0_1) (<= v_main_~cnt~0_2 0) (= v_main_~cnt~0_2 v_main_~cnt~0_1)) (and (< v_itFin_1 (+ v_main_~cnt~0_2 1)) (= v_main_~cnt~0_2 (+ v_itFin_1 v_main_~cnt~0_1)) (< 0 v_main_~cnt~0_2) (= (+ v_itFin_1 v_main_~res~0_2) v_main_~res~0_1) (<= v_main_~cnt~0_2 v_itFin_1))) InVars {main_~res~0=v_main_~res~0_2, main_~cnt~0=v_main_~cnt~0_2} OutVars{main_~res~0=v_main_~res~0_1, main_~cnt~0=v_main_~cnt~0_1} AuxVars[v_itFin_1] AssignedVars[main_~res~0, main_~cnt~0] [2021-05-02 18:20:45,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:20:45 BasicIcfg [2021-05-02 18:20:45,271 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:20:45,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:20:45,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:20:45,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:20:45,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:20:44" (1/4) ... [2021-05-02 18:20:45,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66277062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:20:45, skipping insertion in model container [2021-05-02 18:20:45,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:20:44" (2/4) ... [2021-05-02 18:20:45,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66277062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:20:45, skipping insertion in model container [2021-05-02 18:20:45,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:20:45" (3/4) ... [2021-05-02 18:20:45,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66277062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:20:45, skipping insertion in model container [2021-05-02 18:20:45,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:20:45" (4/4) ... [2021-05-02 18:20:45,276 INFO L111 eAbstractionObserver]: Analyzing ICFG hhk2008.iJordan [2021-05-02 18:20:45,279 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:20:45,281 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:20:45,293 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:20:45,308 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:20:45,309 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:20:45,309 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:20:45,309 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:20:45,309 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:20:45,309 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:20:45,309 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:20:45,309 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:20:45,319 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 18:20:45,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 18:20:45,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:20:45,324 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:20:45,324 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:20:45,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:20:45,328 INFO L82 PathProgramCache]: Analyzing trace with hash 96256690, now seen corresponding path program 1 times [2021-05-02 18:20:45,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:20:45,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557530735] [2021-05-02 18:20:45,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:20:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:45,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:20:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:45,491 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 18:20:45,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:20:45,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557530735] [2021-05-02 18:20:45,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557530735] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:20:45,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:20:45,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 18:20:45,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696788386] [2021-05-02 18:20:45,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 18:20:45,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:20:45,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 18:20:45,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:20:45,505 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:45,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:20:45,542 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-05-02 18:20:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 18:20:45,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 18:20:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:20:45,548 INFO L225 Difference]: With dead ends: 21 [2021-05-02 18:20:45,549 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 18:20:45,550 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:20:45,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 18:20:45,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 18:20:45,569 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 18:20:45,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 18:20:45,570 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 13 [2021-05-02 18:20:45,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:20:45,571 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 18:20:45,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:45,571 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 18:20:45,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 18:20:45,572 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:20:45,572 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:20:45,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:20:45,572 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:20:45,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:20:45,575 INFO L82 PathProgramCache]: Analyzing trace with hash 97180211, now seen corresponding path program 1 times [2021-05-02 18:20:45,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:20:45,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464923072] [2021-05-02 18:20:45,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:20:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:45,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:20:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:45,797 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 18:20:45,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:20:45,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464923072] [2021-05-02 18:20:45,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464923072] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:20:45,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:20:45,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 18:20:45,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901059030] [2021-05-02 18:20:45,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 18:20:45,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:20:45,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 18:20:45,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 18:20:45,800 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:45,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:20:45,972 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-05-02 18:20:45,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 18:20:45,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 18:20:45,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:20:45,974 INFO L225 Difference]: With dead ends: 18 [2021-05-02 18:20:45,974 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 18:20:45,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 181.7ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-02 18:20:45,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 18:20:45,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 18:20:45,977 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 18:20:45,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 18:20:45,977 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-05-02 18:20:45,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:20:45,977 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 18:20:45,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:45,977 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 18:20:45,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 18:20:45,978 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:20:45,978 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:20:45,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 18:20:45,978 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:20:45,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:20:45,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1255659171, now seen corresponding path program 1 times [2021-05-02 18:20:45,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:20:45,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505333625] [2021-05-02 18:20:45,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:20:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:46,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:20:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:46,082 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 18:20:46,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:20:46,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505333625] [2021-05-02 18:20:46,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505333625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:46,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844002676] [2021-05-02 18:20:46,083 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 18:20:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:46,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 18:20:46,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:20:46,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:46,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:46,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:46,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:46,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:46,405 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 18:20:46,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844002676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:46,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:20:46,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-05-02 18:20:46,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081158171] [2021-05-02 18:20:46,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 18:20:46,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:20:46,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 18:20:46,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 18:20:46,407 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 8 states have internal predecessors, (16), 3 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 18:20:46,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:20:46,550 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-05-02 18:20:46,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 18:20:46,550 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 8 states have internal predecessors, (16), 3 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 18:20:46,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:20:46,550 INFO L225 Difference]: With dead ends: 13 [2021-05-02 18:20:46,550 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 18:20:46,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 258.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-02 18:20:46,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 18:20:46,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 18:20:46,551 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 18:20:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 18:20:46,552 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-05-02 18:20:46,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:20:46,552 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 18:20:46,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 8 states have internal predecessors, (16), 3 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 18:20:46,552 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 18:20:46,552 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 18:20:46,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 18:20:46,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:20:46 BasicIcfg [2021-05-02 18:20:46,768 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 18:20:46,768 INFO L168 Benchmark]: Toolchain (without parser) took 2141.60 ms. Allocated memory was 210.8 MB in the beginning and 312.5 MB in the end (delta: 101.7 MB). Free memory was 175.5 MB in the beginning and 260.6 MB in the end (delta: -85.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 18:20:46,769 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 210.8 MB. Free memory is still 192.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 18:20:46,769 INFO L168 Benchmark]: CACSL2BoogieTranslator took 189.32 ms. Allocated memory is still 210.8 MB. Free memory was 175.3 MB in the beginning and 165.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 18:20:46,769 INFO L168 Benchmark]: Boogie Preprocessor took 47.00 ms. Allocated memory is still 210.8 MB. Free memory was 165.6 MB in the beginning and 193.8 MB in the end (delta: -28.1 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. [2021-05-02 18:20:46,770 INFO L168 Benchmark]: RCFGBuilder took 277.53 ms. Allocated memory is still 210.8 MB. Free memory was 193.8 MB in the beginning and 179.8 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 18:20:46,770 INFO L168 Benchmark]: IcfgTransformer took 126.60 ms. Allocated memory is still 210.8 MB. Free memory was 179.8 MB in the beginning and 166.9 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 18:20:46,770 INFO L168 Benchmark]: TraceAbstraction took 1495.24 ms. Allocated memory was 210.8 MB in the beginning and 312.5 MB in the end (delta: 101.7 MB). Free memory was 166.5 MB in the beginning and 260.6 MB in the end (delta: -94.1 MB). Peak memory consumption was 8.3 MB. Max. memory is 8.0 GB. [2021-05-02 18:20:46,771 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from IcfgTransformer: - StatisticsResult: Jordan loop acceleration statistics 0 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 0.09 ms. Allocated memory is still 210.8 MB. Free memory is still 192.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 189.32 ms. Allocated memory is still 210.8 MB. Free memory was 175.3 MB in the beginning and 165.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.00 ms. Allocated memory is still 210.8 MB. Free memory was 165.6 MB in the beginning and 193.8 MB in the end (delta: -28.1 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 277.53 ms. Allocated memory is still 210.8 MB. Free memory was 193.8 MB in the beginning and 179.8 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 126.60 ms. Allocated memory is still 210.8 MB. Free memory was 179.8 MB in the beginning and 166.9 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1495.24 ms. Allocated memory was 210.8 MB in the beginning and 312.5 MB in the end (delta: 101.7 MB). Free memory was 166.5 MB in the beginning and 260.6 MB in the end (delta: -94.1 MB). Peak memory consumption was 8.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: 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, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1458.2ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 8.9ms, AutomataDifference: 372.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 38 SDtfs, 33 SDslu, 54 SDs, 0 SdLazy, 88 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 84.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 465.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 14.0ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 31.1ms SsaConstructionTime, 122.1ms SatisfiabilityAnalysisTime, 571.5ms InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 246 SizeOfPredicates, 2 NumberOfNonLiveVariables, 85 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2 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...