/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-new/gauss_sum.i.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 00:32:55,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 00:32:55,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 00:32:55,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 00:32:55,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 00:32:55,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 00:32:55,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 00:32:55,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 00:32:55,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 00:32:55,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 00:32:55,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 00:32:55,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 00:32:55,421 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 00:32:55,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 00:32:55,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 00:32:55,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 00:32:55,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 00:32:55,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 00:32:55,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 00:32:55,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 00:32:55,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 00:32:55,439 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 00:32:55,450 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 00:32:55,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 00:32:55,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 00:32:55,452 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 00:32:55,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 00:32:55,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 00:32:55,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 00:32:55,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 00:32:55,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 00:32:55,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 00:32:55,452 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 00:32:55,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 00:32:55,453 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 00:32:55,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 00:32:55,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 00:32:55,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 00:32:55,453 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 00:32:55,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 00:32:55,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 00:32:55,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 00:32:55,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 00:32:55,454 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 00:32:55,454 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 00:32:55,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 00:32:55,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 00:32:55,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 00:32:55,619 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 00:32:55,619 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 00:32:55,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2022-04-05 00:32:55,670 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40bd4188d/f7a8b7f83ba24b74980a4b1e45bfa31f/FLAGf22b5c75e [2022-04-05 00:32:56,028 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 00:32:56,028 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2022-04-05 00:32:56,032 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40bd4188d/f7a8b7f83ba24b74980a4b1e45bfa31f/FLAGf22b5c75e [2022-04-05 00:32:56,039 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40bd4188d/f7a8b7f83ba24b74980a4b1e45bfa31f [2022-04-05 00:32:56,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 00:32:56,042 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 00:32:56,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 00:32:56,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 00:32:56,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 00:32:56,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 12:32:56" (1/1) ... [2022-04-05 00:32:56,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e77a1ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:32:56, skipping insertion in model container [2022-04-05 00:32:56,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 12:32:56" (1/1) ... [2022-04-05 00:32:56,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 00:32:56,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 00:32:56,185 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-new/gauss_sum.i.p+cfa-reducer.c[1014,1027] [2022-04-05 00:32:56,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 00:32:56,193 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 00:32:56,206 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-new/gauss_sum.i.p+cfa-reducer.c[1014,1027] [2022-04-05 00:32:56,206 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 00:32:56,214 INFO L208 MainTranslator]: Completed translation [2022-04-05 00:32:56,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:32:56 WrapperNode [2022-04-05 00:32:56,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 00:32:56,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 00:32:56,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 00:32:56,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 00:32:56,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:32:56" (1/1) ... [2022-04-05 00:32:56,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:32:56" (1/1) ... [2022-04-05 00:32:56,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:32:56" (1/1) ... [2022-04-05 00:32:56,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:32:56" (1/1) ... [2022-04-05 00:32:56,228 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:32:56" (1/1) ... [2022-04-05 00:32:56,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:32:56" (1/1) ... [2022-04-05 00:32:56,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:32:56" (1/1) ... [2022-04-05 00:32:56,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 00:32:56,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 00:32:56,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 00:32:56,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 00:32:56,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:32:56" (1/1) ... [2022-04-05 00:32:56,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 00:32:56,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:32:56,252 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) [2022-04-05 00:32:56,260 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 [2022-04-05 00:32:56,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 00:32:56,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 00:32:56,278 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 00:32:56,278 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 00:32:56,278 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 00:32:56,278 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 00:32:56,278 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 00:32:56,279 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 00:32:56,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 00:32:56,279 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 00:32:56,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 00:32:56,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 00:32:56,279 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 00:32:56,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 00:32:56,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 00:32:56,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 00:32:56,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 00:32:56,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 00:32:56,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 00:32:56,319 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 00:32:56,320 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 00:32:56,394 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 00:32:56,397 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 00:32:56,398 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-04-05 00:32:56,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:32:56 BoogieIcfgContainer [2022-04-05 00:32:56,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 00:32:56,399 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 00:32:56,399 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 00:32:56,400 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 00:32:56,402 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:32:56" (1/1) ... [2022-04-05 00:32:56,403 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 00:32:56,849 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-05 00:32:56,849 INFO L91 elerationTransformer]: Accelerated Formula: (and (= (+ v_main_~main__i~0_3 1) v_main_~main__i~0_2) (= v_main_~main__sum~0_2 (+ v_main_~main__sum~0_3 v_main_~main__i~0_3)) (<= v_main_~main__i~0_3 v_main_~main__n~0_3)) InVars {main_~main__n~0=v_main_~main__n~0_3, main_~main__sum~0=v_main_~main__sum~0_3, main_~main__i~0=v_main_~main__i~0_3} OutVars{main_~main__n~0=v_main_~main__n~0_3, main_~main__sum~0=v_main_~main__sum~0_2, main_~main__i~0=v_main_~main__i~0_2} AuxVars[] AssignedVars[main_~main__sum~0, main_~main__i~0] to Formula: (let ((.cse1 (* (- 1) v_main_~main__i~0_3))) (or (and (= v_main_~main__i~0_3 v_main_~main__i~0_2) (= v_main_~main__sum~0_3 v_main_~main__sum~0_2) (< v_main_~main__n~0_3 v_main_~main__i~0_3)) (let ((.cse0 (div (+ .cse1 v_main_~main__i~0_2) 2))) (and (<= .cse0 (+ (div (+ (- 1) .cse1 v_main_~main__n~0_3) 2) 1)) (= (mod (+ v_main_~main__i~0_3 v_main_~main__i~0_2) 2) 0) (< 0 .cse0) (= (+ .cse0 v_main_~main__sum~0_2) (+ (* 2 (* .cse0 v_main_~main__i~0_3)) v_main_~main__sum~0_3 (* 2 (* .cse0 .cse0)))))) (let ((.cse2 (div (+ (- 1) .cse1 v_main_~main__i~0_2) 2))) (and (= (mod (+ v_main_~main__i~0_3 v_main_~main__i~0_2 1) 2) 0) (<= .cse2 (div (+ .cse1 v_main_~main__n~0_3) 2)) (<= 0 .cse2) (= v_main_~main__sum~0_2 (+ (* 2 (* .cse2 v_main_~main__i~0_3)) (* (* .cse2 .cse2) 2) v_main_~main__sum~0_3 .cse2 v_main_~main__i~0_3)))))) InVars {main_~main__n~0=v_main_~main__n~0_3, main_~main__sum~0=v_main_~main__sum~0_3, main_~main__i~0=v_main_~main__i~0_3} OutVars{main_~main__n~0=v_main_~main__n~0_3, main_~main__sum~0=v_main_~main__sum~0_2, main_~main__i~0=v_main_~main__i~0_2} AuxVars[] AssignedVars[main_~main__sum~0, main_~main__i~0] [2022-04-05 00:32:56,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 12:32:56 BasicIcfg [2022-04-05 00:32:56,853 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 00:32:56,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 00:32:56,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 00:32:56,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 00:32:56,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 12:32:56" (1/4) ... [2022-04-05 00:32:56,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf2119d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 12:32:56, skipping insertion in model container [2022-04-05 00:32:56,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:32:56" (2/4) ... [2022-04-05 00:32:56,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf2119d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 12:32:56, skipping insertion in model container [2022-04-05 00:32:56,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:32:56" (3/4) ... [2022-04-05 00:32:56,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf2119d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 12:32:56, skipping insertion in model container [2022-04-05 00:32:56,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 12:32:56" (4/4) ... [2022-04-05 00:32:56,858 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+cfa-reducer.cJordan [2022-04-05 00:32:56,861 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 00:32:56,861 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 00:32:56,885 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 00:32:56,889 INFO L340 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 [2022-04-05 00:32:56,890 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 00:32:56,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 00:32:56,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-05 00:32:56,902 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:32:56,902 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:32:56,902 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:32:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:32:56,905 INFO L85 PathProgramCache]: Analyzing trace with hash 323261602, now seen corresponding path program 1 times [2022-04-05 00:32:56,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:32:56,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406166122] [2022-04-05 00:32:56,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:32:56,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:32:56,971 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 00:32:56,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476600141] [2022-04-05 00:32:56,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:32:56,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:32:56,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:32:57,004 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) [2022-04-05 00:32:57,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 00:32:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:32:57,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-05 00:32:57,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:32:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:32:57,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 00:32:57,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:32:57,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406166122] [2022-04-05 00:32:57,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 00:32:57,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476600141] [2022-04-05 00:32:57,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476600141] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 00:32:57,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 00:32:57,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 00:32:57,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309476834] [2022-04-05 00:32:57,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 00:32:57,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 00:32:57,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:32:57,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 00:32:57,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-04-05 00:32:57,179 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:32:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:32:57,198 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-04-05 00:32:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 00:32:57,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-05 00:32:57,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:32:57,203 INFO L225 Difference]: With dead ends: 19 [2022-04-05 00:32:57,204 INFO L226 Difference]: Without dead ends: 13 [2022-04-05 00:32:57,204 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-04-05 00:32:57,207 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 00:32:57,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 00:32:57,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-04-05 00:32:57,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-04-05 00:32:57,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:32:57,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-04-05 00:32:57,225 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2022-04-05 00:32:57,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:32:57,226 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-04-05 00:32:57,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:32:57,226 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-04-05 00:32:57,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 00:32:57,226 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:32:57,226 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:32:57,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 00:32:57,460 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-04-05 00:32:57,460 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:32:57,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:32:57,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1431144312, now seen corresponding path program 1 times [2022-04-05 00:32:57,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:32:57,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575292948] [2022-04-05 00:32:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:32:57,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:32:57,474 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 00:32:57,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755331217] [2022-04-05 00:32:57,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:32:57,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:32:57,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:32:57,478 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) [2022-04-05 00:32:57,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 00:32:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:32:58,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 00:32:58,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:33:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:33:00,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 00:33:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:33:05,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:33:05,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575292948] [2022-04-05 00:33:05,111 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 00:33:05,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755331217] [2022-04-05 00:33:05,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755331217] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 00:33:05,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 00:33:05,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-04-05 00:33:05,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907219953] [2022-04-05 00:33:05,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 00:33:05,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 00:33:05,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:33:05,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 00:33:05,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=47, Unknown=1, NotChecked=0, Total=72 [2022-04-05 00:33:05,116 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:33:07,235 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 [] [2022-04-05 00:33:09,243 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 [] [2022-04-05 00:33:12,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:33:12,069 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-04-05 00:33:12,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 00:33:12,070 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-05 00:33:12,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:33:12,070 INFO L225 Difference]: With dead ends: 15 [2022-04-05 00:33:12,070 INFO L226 Difference]: Without dead ends: 14 [2022-04-05 00:33:12,071 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=31, Invalid=57, Unknown=2, NotChecked=0, Total=90 [2022-04-05 00:33:12,071 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-04-05 00:33:12,072 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 50 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 2 Unknown, 7 Unchecked, 4.6s Time] [2022-04-05 00:33:12,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-05 00:33:12,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-05 00:33:12,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:33:12,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-04-05 00:33:12,074 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-04-05 00:33:12,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:33:12,074 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-04-05 00:33:12,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:33:12,074 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-04-05 00:33:12,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-05 00:33:12,075 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:33:12,075 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:33:12,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 00:33:12,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-04-05 00:33:12,288 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:33:12,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:33:12,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1415769954, now seen corresponding path program 2 times [2022-04-05 00:33:12,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:33:12,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368000851] [2022-04-05 00:33:12,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:33:12,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:33:12,301 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 00:33:12,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194970345] [2022-04-05 00:33:12,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 00:33:12,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:33:12,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:33:12,305 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) [2022-04-05 00:33:12,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 00:33:13,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 00:33:13,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 00:33:13,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 00:33:13,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:33:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:33:58,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 00:34:31,322 WARN L232 SmtUtils]: Spent 7.90s on a formula simplification that was a NOOP. DAG size: 165 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 00:34:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:34:38,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:34:38,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368000851] [2022-04-05 00:34:38,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 00:34:38,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194970345] [2022-04-05 00:34:38,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194970345] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 00:34:38,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 00:34:38,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-04-05 00:34:38,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345941433] [2022-04-05 00:34:38,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 00:34:38,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 00:34:38,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:34:38,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 00:34:38,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=69, Unknown=10, NotChecked=0, Total=110 [2022-04-05 00:34:38,677 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:34:45,391 WARN L232 SmtUtils]: Spent 6.66s on a formula simplification. DAG size of input: 168 DAG size of output: 9 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 00:34:56,371 WARN L232 SmtUtils]: Spent 6.89s on a formula simplification. DAG size of input: 97 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 00:34:58,392 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 [] [2022-04-05 00:35:15,816 WARN L232 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 137 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 00:35:15,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:35:15,819 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-04-05 00:35:15,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 00:35:15,820 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-05 00:35:15,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:35:15,820 INFO L225 Difference]: With dead ends: 16 [2022-04-05 00:35:15,820 INFO L226 Difference]: Without dead ends: 15 [2022-04-05 00:35:15,820 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 70.5s TimeCoverageRelationStatistics Valid=52, Invalid=112, Unknown=18, NotChecked=0, Total=182 [2022-04-05 00:35:15,821 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-05 00:35:15,821 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 1 Unknown, 14 Unchecked, 2.1s Time] [2022-04-05 00:35:15,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-04-05 00:35:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-04-05 00:35:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:35:15,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-04-05 00:35:15,823 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2022-04-05 00:35:15,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:35:15,824 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-04-05 00:35:15,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:35:15,824 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-04-05 00:35:15,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-05 00:35:15,824 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:35:15,824 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:35:15,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-05 00:35:16,029 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:35:16,030 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:35:16,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:35:16,030 INFO L85 PathProgramCache]: Analyzing trace with hash 939164856, now seen corresponding path program 3 times [2022-04-05 00:35:16,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:35:16,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644136631] [2022-04-05 00:35:16,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:35:16,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:35:16,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 00:35:16,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102165212] [2022-04-05 00:35:16,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 00:35:16,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:35:16,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:35:16,052 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 00:35:16,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process