/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 0.2.2-dev-d966a43 [2022-01-31 13:17:41,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 13:17:41,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 13:17:41,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 13:17:41,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 13:17:41,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 13:17:41,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 13:17:41,414 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 13:17:41,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 13:17:41,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 13:17:41,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 13:17:41,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 13:17:41,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 13:17:41,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 13:17:41,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 13:17:41,420 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 13:17:41,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 13:17:41,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 13:17:41,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 13:17:41,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 13:17:41,437 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 13:17:41,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 13:17:41,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 13:17:41,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 13:17:41,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 13:17:41,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 13:17:41,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 13:17:41,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 13:17:41,479 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 13:17:41,488 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 13:17:41,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 13:17:41,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 13:17:41,489 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 13:17:41,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 13:17:41,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 13:17:41,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 13:17:41,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 13:17:41,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 13:17:41,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 13:17:41,490 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 13:17:41,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 13:17:41,490 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 13:17:41,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 13:17:41,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 13:17:41,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 13:17:41,490 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 13:17:41,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 13:17:41,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:17:41,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 13:17:41,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 13:17:41,491 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 13:17:41,491 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 13:17:41,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 13:17:41,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 13:17:41,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 13:17:41,673 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 13:17:41,673 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 13:17:41,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark23_conjunctive.i [2022-01-31 13:17:41,724 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/974e0e2bb/62d99c9a9a554352995bbba791d3142b/FLAGa3cdd88fc [2022-01-31 13:17:42,073 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 13:17:42,073 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark23_conjunctive.i [2022-01-31 13:17:42,077 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/974e0e2bb/62d99c9a9a554352995bbba791d3142b/FLAGa3cdd88fc [2022-01-31 13:17:42,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/974e0e2bb/62d99c9a9a554352995bbba791d3142b [2022-01-31 13:17:42,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 13:17:42,520 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 13:17:42,522 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 13:17:42,522 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 13:17:42,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 13:17:42,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:17:42" (1/1) ... [2022-01-31 13:17:42,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c65cb19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:42, skipping insertion in model container [2022-01-31 13:17:42,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:17:42" (1/1) ... [2022-01-31 13:17:42,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 13:17:42,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 13:17:42,655 WARN L230 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] [2022-01-31 13:17:42,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:17:42,677 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 13:17:42,684 WARN L230 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] [2022-01-31 13:17:42,686 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:17:42,695 INFO L208 MainTranslator]: Completed translation [2022-01-31 13:17:42,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:42 WrapperNode [2022-01-31 13:17:42,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 13:17:42,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 13:17:42,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 13:17:42,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 13:17:42,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:42" (1/1) ... [2022-01-31 13:17:42,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:42" (1/1) ... [2022-01-31 13:17:42,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:42" (1/1) ... [2022-01-31 13:17:42,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:42" (1/1) ... [2022-01-31 13:17:42,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:42" (1/1) ... [2022-01-31 13:17:42,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:42" (1/1) ... [2022-01-31 13:17:42,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:42" (1/1) ... [2022-01-31 13:17:42,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 13:17:42,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 13:17:42,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 13:17:42,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 13:17:42,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:42" (1/1) ... [2022-01-31 13:17:42,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:17:42,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:17:42,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 13:17:42,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 13:17:42,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 13:17:42,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 13:17:42,784 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 13:17:42,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 13:17:42,784 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 13:17:42,784 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 13:17:42,785 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 13:17:42,785 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 13:17:42,785 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 13:17:42,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 13:17:42,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 13:17:42,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-01-31 13:17:42,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 13:17:42,786 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 13:17:42,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 13:17:42,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 13:17:42,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 13:17:42,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 13:17:42,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 13:17:42,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 13:17:42,855 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 13:17:42,858 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 13:17:42,944 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 13:17:42,948 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 13:17:42,948 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 13:17:42,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:17:42 BoogieIcfgContainer [2022-01-31 13:17:42,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 13:17:42,950 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 13:17:42,950 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 13:17:42,950 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 13:17:42,952 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:17:42" (1/1) ... [2022-01-31 13:17:43,068 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 13:17:43,069 INFO L91 elerationTransformer]: Accelerated Formula: (and (< v_main_~i~0_3 100) (= v_main_~j~0_1 (+ v_main_~j~0_2 2)) (= v_main_~i~0_2 (+ v_main_~i~0_3 1))) 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~post3=|v_main_#t~post3_1|} AuxVars[] AssignedVars[main_~j~0, main_~i~0, main_#t~post3] to Formula: (or (and (= (+ v_main_~j~0_2 (* v_main_~i~0_2 2)) (+ v_main_~j~0_1 (* v_main_~i~0_3 2))) (< v_main_~i~0_2 101) (< v_main_~i~0_3 v_main_~i~0_2)) (and (not (< v_main_~i~0_3 100)) (= |v_main_#t~post3_3| |v_main_#t~post3_1|) (= v_main_~j~0_2 v_main_~j~0_1) (= v_main_~i~0_3 v_main_~i~0_2))) InVars {main_~i~0=v_main_~i~0_3, main_#t~post3=|v_main_#t~post3_3|, main_~j~0=v_main_~j~0_2} OutVars{main_~i~0=v_main_~i~0_2, main_#t~post3=|v_main_#t~post3_1|, main_~j~0=v_main_~j~0_1} AuxVars[] AssignedVars[main_~j~0, main_~i~0, main_#t~post3] [2022-01-31 13:17:43,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:17:43 BasicIcfg [2022-01-31 13:17:43,072 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 13:17:43,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 13:17:43,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 13:17:43,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 13:17:43,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 01:17:42" (1/4) ... [2022-01-31 13:17:43,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c63876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:17:43, skipping insertion in model container [2022-01-31 13:17:43,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:42" (2/4) ... [2022-01-31 13:17:43,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c63876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:17:43, skipping insertion in model container [2022-01-31 13:17:43,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:17:42" (3/4) ... [2022-01-31 13:17:43,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c63876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 01:17:43, skipping insertion in model container [2022-01-31 13:17:43,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:17:43" (4/4) ... [2022-01-31 13:17:43,077 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark23_conjunctive.iJordan [2022-01-31 13:17:43,080 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 13:17:43,080 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 13:17:43,105 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 13:17:43,110 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 13:17:43,110 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 13:17:43,119 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) [2022-01-31 13:17:43,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 13:17:43,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:17:43,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:17:43,124 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:17:43,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:17:43,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1809217115, now seen corresponding path program 1 times [2022-01-31 13:17:43,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:17:43,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82494381] [2022-01-31 13:17:43,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:17:43,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:17:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:17:43,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:17:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:17:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:17:43,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:17:43,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82494381] [2022-01-31 13:17:43,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82494381] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:17:43,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:17:43,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 13:17:43,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368606839] [2022-01-31 13:17:43,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:17:43,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 13:17:43,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:17:43,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 13:17:43,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 13:17:43,267 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) [2022-01-31 13:17:43,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:17:43,295 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-01-31 13:17:43,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 13:17:43,297 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 [2022-01-31 13:17:43,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:17:43,311 INFO L225 Difference]: With dead ends: 20 [2022-01-31 13:17:43,311 INFO L226 Difference]: Without dead ends: 13 [2022-01-31 13:17:43,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 13:17:43,320 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:17:43,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:17:43,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-01-31 13:17:43,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-01-31 13:17:43,341 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) [2022-01-31 13:17:43,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-01-31 13:17:43,343 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2022-01-31 13:17:43,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:17:43,343 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-01-31 13:17:43,344 INFO L471 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) [2022-01-31 13:17:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-01-31 13:17:43,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 13:17:43,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:17:43,345 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:17:43,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 13:17:43,345 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:17:43,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:17:43,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1810140636, now seen corresponding path program 1 times [2022-01-31 13:17:43,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:17:43,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531689065] [2022-01-31 13:17:43,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:17:43,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:17:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:17:43,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:17:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:17:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:17:43,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:17:43,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531689065] [2022-01-31 13:17:43,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531689065] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:17:43,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:17:43,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 13:17:43,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892070071] [2022-01-31 13:17:43,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:17:43,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 13:17:43,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:17:43,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 13:17:43,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 13:17:43,434 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) [2022-01-31 13:17:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:17:43,469 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2022-01-31 13:17:43,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 13:17:43,471 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 [2022-01-31 13:17:43,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:17:43,471 INFO L225 Difference]: With dead ends: 14 [2022-01-31 13:17:43,471 INFO L226 Difference]: Without dead ends: 14 [2022-01-31 13:17:43,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 13:17:43,472 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:17:43,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:17:43,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-31 13:17:43,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-31 13:17:43,475 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) [2022-01-31 13:17:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-01-31 13:17:43,475 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-01-31 13:17:43,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:17:43,476 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-01-31 13:17:43,476 INFO L471 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) [2022-01-31 13:17:43,476 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-01-31 13:17:43,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 13:17:43,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:17:43,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:17:43,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 13:17:43,477 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:17:43,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:17:43,477 INFO L85 PathProgramCache]: Analyzing trace with hash 306506437, now seen corresponding path program 1 times [2022-01-31 13:17:43,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:17:43,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830502170] [2022-01-31 13:17:43,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:17:43,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:17:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:17:43,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:17:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:17:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:17:43,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:17:43,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830502170] [2022-01-31 13:17:43,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830502170] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:17:43,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887785948] [2022-01-31 13:17:43,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:17:43,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:17:43,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:17:43,653 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:17:43,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 13:17:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:17:43,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 13:17:43,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:17:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:17:43,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:17:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:17:44,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887785948] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:17:44,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:17:44,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-31 13:17:44,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630628030] [2022-01-31 13:17:44,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:17:44,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 13:17:44,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:17:44,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 13:17:44,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-31 13:17:44,091 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 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) [2022-01-31 13:17:44,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:17:44,187 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2022-01-31 13:17:44,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 13:17:44,187 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 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 [2022-01-31 13:17:44,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:17:44,188 INFO L225 Difference]: With dead ends: 12 [2022-01-31 13:17:44,188 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 13:17:44,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-01-31 13:17:44,192 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:17:44,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 40 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:17:44,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 13:17:44,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 13:17:44,193 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) [2022-01-31 13:17:44,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 13:17:44,193 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2022-01-31 13:17:44,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:17:44,194 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 13:17:44,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 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) [2022-01-31 13:17:44,194 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 13:17:44,194 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 13:17:44,196 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 13:17:44,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 13:17:44,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:17:44,413 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-01-31 13:17:44,414 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 13:17:44,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 01:17:44 BasicIcfg [2022-01-31 13:17:44,417 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 13:17:44,418 INFO L158 Benchmark]: Toolchain (without parser) took 1897.25ms. Allocated memory was 205.5MB in the beginning and 263.2MB in the end (delta: 57.7MB). Free memory was 158.8MB in the beginning and 207.9MB in the end (delta: -49.1MB). Peak memory consumption was 10.1MB. Max. memory is 8.0GB. [2022-01-31 13:17:44,418 INFO L158 Benchmark]: CDTParser took 0.58ms. Allocated memory is still 205.5MB. Free memory was 175.1MB in the beginning and 175.1MB in the end (delta: 72.5kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 13:17:44,418 INFO L158 Benchmark]: CACSL2BoogieTranslator took 173.63ms. Allocated memory is still 205.5MB. Free memory was 158.6MB in the beginning and 183.6MB in the end (delta: -25.0MB). Peak memory consumption was 8.7MB. Max. memory is 8.0GB. [2022-01-31 13:17:44,418 INFO L158 Benchmark]: Boogie Preprocessor took 16.83ms. Allocated memory is still 205.5MB. Free memory was 183.6MB in the beginning and 182.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 13:17:44,419 INFO L158 Benchmark]: RCFGBuilder took 235.69ms. Allocated memory is still 205.5MB. Free memory was 181.9MB in the beginning and 172.5MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-31 13:17:44,419 INFO L158 Benchmark]: IcfgTransformer took 122.46ms. Allocated memory is still 205.5MB. Free memory was 172.5MB in the beginning and 164.4MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-01-31 13:17:44,419 INFO L158 Benchmark]: TraceAbstraction took 1344.05ms. Allocated memory was 205.5MB in the beginning and 263.2MB in the end (delta: 57.7MB). Free memory was 164.1MB in the beginning and 207.9MB in the end (delta: -43.8MB). Peak memory consumption was 15.0MB. Max. memory is 8.0GB. [2022-01-31 13:17:44,421 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 0.58ms. Allocated memory is still 205.5MB. Free memory was 175.1MB in the beginning and 175.1MB in the end (delta: 72.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 173.63ms. Allocated memory is still 205.5MB. Free memory was 158.6MB in the beginning and 183.6MB in the end (delta: -25.0MB). Peak memory consumption was 8.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.83ms. Allocated memory is still 205.5MB. Free memory was 183.6MB in the beginning and 182.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 235.69ms. Allocated memory is still 205.5MB. Free memory was 181.9MB in the beginning and 172.5MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 122.46ms. Allocated memory is still 205.5MB. Free memory was 172.5MB in the beginning and 164.4MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 1344.05ms. Allocated memory was 205.5MB in the beginning and 263.2MB in the end (delta: 57.7MB). Free memory was 164.1MB in the beginning and 207.9MB in the end (delta: -43.8MB). Peak memory consumption was 15.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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. OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 28 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 27 mSDsluCounter, 82 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 42 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 50 IncrementalHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 40 mSDtfsCounter, 50 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 50 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 204 SizeOfPredicates, 5 NumberOfNonLiveVariables, 58 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 0/3 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! [2022-01-31 13:17:44,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...