/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/benchmark20_conjunctive.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 13:17:39,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 13:17:39,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 13:17:40,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 13:17:40,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 13:17:40,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 13:17:40,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 13:17:40,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 13:17:40,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 13:17:40,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 13:17:40,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 13:17:40,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 13:17:40,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 13:17:40,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 13:17:40,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 13:17:40,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 13:17:40,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 13:17:40,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 13:17:40,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 13:17:40,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 13:17:40,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 13:17:40,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 13:17:40,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 13:17:40,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 13:17:40,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 13:17:40,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 13:17:40,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 13:17:40,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 13:17:40,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 13:17:40,039 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 13:17:40,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 13:17:40,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 13:17:40,041 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 13:17:40,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 13:17:40,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 13:17:40,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 13:17:40,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 13:17:40,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 13:17:40,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 13:17:40,041 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 13:17:40,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 13:17:40,042 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 13:17:40,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 13:17:40,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 13:17:40,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 13:17:40,043 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 13:17:40,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 13:17:40,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:17:40,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 13:17:40,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 13:17:40,045 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 13:17:40,045 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 13:17:40,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 13:17:40,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 13:17:40,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 13:17:40,262 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 13:17:40,265 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 13:17:40,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark20_conjunctive.i [2022-01-31 13:17:40,321 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c08fd4d/2f50bd0d348047b38ee6adcd94c1fcf0/FLAG9d8f4d28c [2022-01-31 13:17:40,661 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 13:17:40,661 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark20_conjunctive.i [2022-01-31 13:17:40,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c08fd4d/2f50bd0d348047b38ee6adcd94c1fcf0/FLAG9d8f4d28c [2022-01-31 13:17:41,105 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c08fd4d/2f50bd0d348047b38ee6adcd94c1fcf0 [2022-01-31 13:17:41,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 13:17:41,108 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 13:17:41,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 13:17:41,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 13:17:41,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 13:17:41,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:17:41" (1/1) ... [2022-01-31 13:17:41,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c12922b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:41, skipping insertion in model container [2022-01-31 13:17:41,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:17:41" (1/1) ... [2022-01-31 13:17:41,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 13:17:41,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 13:17:41,220 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/benchmark20_conjunctive.i[873,886] [2022-01-31 13:17:41,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:17:41,231 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 13:17:41,245 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/benchmark20_conjunctive.i[873,886] [2022-01-31 13:17:41,247 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:17:41,255 INFO L208 MainTranslator]: Completed translation [2022-01-31 13:17:41,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:41 WrapperNode [2022-01-31 13:17:41,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 13:17:41,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 13:17:41,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 13:17:41,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 13:17:41,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:41" (1/1) ... [2022-01-31 13:17:41,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:41" (1/1) ... [2022-01-31 13:17:41,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:41" (1/1) ... [2022-01-31 13:17:41,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:41" (1/1) ... [2022-01-31 13:17:41,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:41" (1/1) ... [2022-01-31 13:17:41,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:41" (1/1) ... [2022-01-31 13:17:41,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:41" (1/1) ... [2022-01-31 13:17:41,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 13:17:41,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 13:17:41,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 13:17:41,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 13:17:41,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:41" (1/1) ... [2022-01-31 13:17:41,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:17:41,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:17:41,342 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 13:17:41,360 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 13:17:41,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 13:17:41,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 13:17:41,370 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 13:17:41,370 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 13:17:41,371 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 13:17:41,371 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 13:17:41,371 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 13:17:41,371 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 13:17:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 13:17:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 13:17:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 13:17:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-01-31 13:17:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 13:17:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 13:17:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 13:17:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 13:17:41,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 13:17:41,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 13:17:41,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 13:17:41,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 13:17:41,440 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 13:17:41,441 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 13:17:41,508 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 13:17:41,512 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 13:17:41,512 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 13:17:41,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:17:41 BoogieIcfgContainer [2022-01-31 13:17:41,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 13:17:41,514 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 13:17:41,514 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 13:17:41,515 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 13:17:41,517 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:17:41" (1/1) ... [2022-01-31 13:17:42,980 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 13:17:42,981 INFO L91 elerationTransformer]: Accelerated Formula: (and (= (+ v_main_~i~0_3 v_main_~sum~0_2) v_main_~sum~0_1) (< v_main_~i~0_3 v_main_~n~0_2) (= v_main_~i~0_2 (+ v_main_~i~0_3 1))) InVars {main_~sum~0=v_main_~sum~0_2, main_~i~0=v_main_~i~0_3, main_~n~0=v_main_~n~0_2} OutVars{main_~sum~0=v_main_~sum~0_1, main_#t~post4=|v_main_#t~post4_1|, main_~i~0=v_main_~i~0_2, main_~n~0=v_main_~n~0_2} AuxVars[] AssignedVars[main_~sum~0, main_#t~post4, main_~i~0] to Formula: (let ((.cse1 (* (- 1) v_main_~i~0_3)) (.cse2 (* (- 1) v_main_~i~0_2))) (or (and (not (< v_main_~i~0_3 v_main_~n~0_2)) (= |v_main_#t~post4_3| |v_main_#t~post4_1|) (= v_main_~sum~0_2 v_main_~sum~0_1) (= v_main_~i~0_3 v_main_~i~0_2)) (let ((.cse0 (div (+ .cse2 v_main_~i~0_3 1) (- 2)))) (and (= (mod (+ v_main_~i~0_3 v_main_~i~0_2 1) 2) 0) (= (+ .cse0 v_main_~i~0_3 (* (* .cse0 .cse0) 2) (* 2 (* .cse0 v_main_~i~0_3)) v_main_~sum~0_2) v_main_~sum~0_1) (< .cse0 (+ (div (+ (- 1) v_main_~n~0_2 .cse1) 2) 1)) (<= 0 .cse0))) (let ((.cse3 (div (+ .cse2 v_main_~i~0_3) (- 2)))) (and (= (+ (* (* .cse3 .cse3) 2) (* 2 (* v_main_~i~0_3 .cse3)) v_main_~sum~0_2) (+ .cse3 v_main_~sum~0_1)) (< 0 .cse3) (< .cse3 (+ (div (+ (- 2) v_main_~n~0_2 .cse1) 2) 2)) (= (mod (+ v_main_~i~0_3 v_main_~i~0_2) 2) 0))))) InVars {main_~i~0=v_main_~i~0_3, main_#t~post4=|v_main_#t~post4_3|, main_~n~0=v_main_~n~0_2, main_~sum~0=v_main_~sum~0_2} OutVars{main_#t~post4=|v_main_#t~post4_1|, main_~i~0=v_main_~i~0_2, main_~n~0=v_main_~n~0_2, main_~sum~0=v_main_~sum~0_1} AuxVars[] AssignedVars[main_~sum~0, main_#t~post4, main_~i~0] [2022-01-31 13:17:42,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:17:42 BasicIcfg [2022-01-31 13:17:42,985 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 13:17:42,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 13:17:42,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 13:17:42,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 13:17:42,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 01:17:41" (1/4) ... [2022-01-31 13:17:42,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3801e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:17:42, skipping insertion in model container [2022-01-31 13:17:42,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:17:41" (2/4) ... [2022-01-31 13:17:42,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3801e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:17:42, skipping insertion in model container [2022-01-31 13:17:42,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:17:41" (3/4) ... [2022-01-31 13:17:42,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3801e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 01:17:42, skipping insertion in model container [2022-01-31 13:17:42,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:17:42" (4/4) ... [2022-01-31 13:17:42,990 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark20_conjunctive.iJordan [2022-01-31 13:17:42,996 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 13:17:42,997 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 13:17:43,028 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 13:17:43,032 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 13:17:43,033 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 13:17:43,041 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 13:17:43,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 13:17:43,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:17:43,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:17:43,047 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:17:43,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:17:43,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1809217115, now seen corresponding path program 1 times [2022-01-31 13:17:43,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:17:43,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142047173] [2022-01-31 13:17:43,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:17:43,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:17:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:17:43,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:17:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:17:43,146 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 13:17:43,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:17:43,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142047173] [2022-01-31 13:17:43,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142047173] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:17:43,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:17:43,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 13:17:43,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172233985] [2022-01-31 13:17:43,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:17:43,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 13:17:43,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:17:43,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 13:17:43,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 13:17:43,171 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 13:17:43,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:17:43,191 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-01-31 13:17:43,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 13:17:43,205 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 13:17:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:17:43,210 INFO L225 Difference]: With dead ends: 20 [2022-01-31 13:17:43,210 INFO L226 Difference]: Without dead ends: 13 [2022-01-31 13:17:43,211 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 13:17:43,215 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 13:17:43,216 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 13:17:43,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-01-31 13:17:43,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-01-31 13:17:43,239 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 13:17:43,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-01-31 13:17:43,240 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2022-01-31 13:17:43,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:17:43,240 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-01-31 13:17:43,241 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 13:17:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-01-31 13:17:43,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 13:17:43,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:17:43,241 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:17:43,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 13:17:43,242 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:17:43,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:17:43,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1810140636, now seen corresponding path program 1 times [2022-01-31 13:17:43,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:17:43,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046031690] [2022-01-31 13:17:43,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:17:43,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:17:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:17:43,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:17:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:17:43,330 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 13:17:43,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:17:43,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046031690] [2022-01-31 13:17:43,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046031690] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:17:43,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:17:43,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 13:17:43,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188782274] [2022-01-31 13:17:43,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:17:43,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 13:17:43,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:17:43,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 13:17:43,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 13:17:43,333 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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 13:17:43,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:17:43,377 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2022-01-31 13:17:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 13:17:43,378 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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 13:17:43,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:17:43,378 INFO L225 Difference]: With dead ends: 17 [2022-01-31 13:17:43,378 INFO L226 Difference]: Without dead ends: 14 [2022-01-31 13:17:43,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 13:17:43,380 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:17:43,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 28 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:17:43,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-31 13:17:43,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-31 13:17:43,382 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 13:17:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-01-31 13:17:43,382 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-01-31 13:17:43,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:17:43,383 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-01-31 13:17:43,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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 13:17:43,383 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-01-31 13:17:43,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 13:17:43,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:17:43,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:17:43,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 13:17:43,384 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:17:43,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:17:43,384 INFO L85 PathProgramCache]: Analyzing trace with hash 306506437, now seen corresponding path program 1 times [2022-01-31 13:17:43,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:17:43,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682780952] [2022-01-31 13:17:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:17:43,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:17:43,394 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:17:43,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504259206] [2022-01-31 13:17:43,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:17:43,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:17:43,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:17:43,397 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 13:17:43,398 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 13:17:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:17:43,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 13:17:43,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:17:43,725 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 13:17:43,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:17:48,116 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 13:17:48,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:17:48,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682780952] [2022-01-31 13:17:48,117 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:17:48,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504259206] [2022-01-31 13:17:48,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504259206] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:17:48,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:17:48,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-01-31 13:17:48,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429100366] [2022-01-31 13:17:48,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:17:48,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 13:17:48,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:17:48,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 13:17:48,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-31 13:17:48,119 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 2 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 13:17:48,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:17:48,140 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2022-01-31 13:17:48,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 13:17:48,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 2 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 [2022-01-31 13:17:48,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:17:48,141 INFO L225 Difference]: With dead ends: 18 [2022-01-31 13:17:48,141 INFO L226 Difference]: Without dead ends: 15 [2022-01-31 13:17:48,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-31 13:17:48,142 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:17:48,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 2 Unchecked, 0.0s Time] [2022-01-31 13:17:48,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-31 13:17:48,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-31 13:17:48,144 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) [2022-01-31 13:17:48,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-01-31 13:17:48,144 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2022-01-31 13:17:48,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:17:48,144 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-01-31 13:17:48,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 2 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 13:17:48,145 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-01-31 13:17:48,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 13:17:48,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:17:48,145 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:17:48,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 13:17:48,363 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 13:17:48,363 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:17:48,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:17:48,363 INFO L85 PathProgramCache]: Analyzing trace with hash 938486524, now seen corresponding path program 2 times [2022-01-31 13:17:48,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:17:48,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442583241] [2022-01-31 13:17:48,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:17:48,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:17:48,370 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:17:48,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888537345] [2022-01-31 13:17:48,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 13:17:48,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:17:48,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:17:48,388 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:17:48,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 13:17:48,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 13:17:48,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:17:48,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 13:17:48,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:17:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:17:51,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:18:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:18:00,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:18:00,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442583241] [2022-01-31 13:18:00,542 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:18:00,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888537345] [2022-01-31 13:18:00,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888537345] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:18:00,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:18:00,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 13:18:00,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732917539] [2022-01-31 13:18:00,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:18:00,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 13:18:00,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:18:00,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 13:18:00,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=49, Unknown=1, NotChecked=0, Total=72 [2022-01-31 13:18:00,550 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (3), 2 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 13:18:02,571 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 13:18:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:18:04,953 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-01-31 13:18:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 13:18:04,954 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 13:18:04,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:18:04,954 INFO L225 Difference]: With dead ends: 20 [2022-01-31 13:18:04,954 INFO L226 Difference]: Without dead ends: 17 [2022-01-31 13:18:04,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=32, Invalid=76, Unknown=2, NotChecked=0, Total=110 [2022-01-31 13:18:04,955 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:18:04,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 60 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 1 Unknown, 7 Unchecked, 2.1s Time] [2022-01-31 13:18:04,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-31 13:18:04,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-31 13:18:04,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 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 13:18:04,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-01-31 13:18:04,958 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2022-01-31 13:18:04,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:18:04,958 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-01-31 13:18:04,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (3), 2 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 13:18:04,958 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-01-31 13:18:04,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 13:18:04,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:18:04,958 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:18:04,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 13:18:05,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 13:18:05,175 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:18:05,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:18:05,176 INFO L85 PathProgramCache]: Analyzing trace with hash 797507612, now seen corresponding path program 3 times [2022-01-31 13:18:05,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:18:05,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607919444] [2022-01-31 13:18:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:05,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:18:05,182 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:18:05,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772491666] [2022-01-31 13:18:05,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 13:18:05,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:18:05,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:18:05,194 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:18:05,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 13:18:06,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 13:18:06,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:18:06,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 13:18:06,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:18:56,092 WARN L228 SmtUtils]: Spent 42.00s on a formula simplification that was a NOOP. DAG size: 112 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 13:20:38,032 WARN L228 SmtUtils]: Spent 1.13m on a formula simplification that was a NOOP. DAG size: 191 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 13:31:44,586 WARN L228 SmtUtils]: Spent 32.27s on a formula simplification that was a NOOP. DAG size: 403 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 13:32:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:32:09,669 INFO L328 TraceCheckSpWp]: Computing backward predicates...