/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/loops-crafted-1/theatreSquare.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 04:24:25,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 04:24:25,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 04:24:25,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 04:24:25,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 04:24:25,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 04:24:25,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 04:24:25,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 04:24:25,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 04:24:25,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 04:24:25,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 04:24:25,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 04:24:25,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 04:24:25,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 04:24:25,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 04:24:25,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 04:24:25,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 04:24:25,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 04:24:25,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 04:24:25,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 04:24:25,281 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 04:24:25,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 04:24:25,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 04:24:25,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 04:24:25,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 04:24:25,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 04:24:25,289 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 04:24:25,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 04:24:25,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 04:24:25,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 04:24:25,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 04:24:25,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 04:24:25,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 04:24:25,293 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 04:24:25,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 04:24:25,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 04:24:25,294 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 04:24:25,295 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 04:24:25,295 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 04:24:25,295 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 04:24:25,296 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 04:24:25,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 04:24:25,303 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 04:24:25,312 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 04:24:25,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 04:24:25,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 04:24:25,315 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 04:24:25,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 04:24:25,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 04:24:25,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 04:24:25,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 04:24:25,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 04:24:25,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 04:24:25,316 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 04:24:25,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 04:24:25,317 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 04:24:25,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 04:24:25,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 04:24:25,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 04:24:25,317 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 04:24:25,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 04:24:25,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 04:24:25,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 04:24:25,318 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 04:24:25,318 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 04:24:25,318 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 04:24:25,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 04:24:25,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 04:24:25,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 04:24:25,581 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 04:24:25,582 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 04:24:25,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-03-20 04:24:25,653 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab22660ee/ade3e3d5af9c4018981b291b7cdc0f36/FLAG0c8de0836 [2022-03-20 04:24:26,018 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 04:24:26,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-03-20 04:24:26,029 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab22660ee/ade3e3d5af9c4018981b291b7cdc0f36/FLAG0c8de0836 [2022-03-20 04:24:26,426 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab22660ee/ade3e3d5af9c4018981b291b7cdc0f36 [2022-03-20 04:24:26,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 04:24:26,430 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 04:24:26,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 04:24:26,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 04:24:26,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 04:24:26,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:24:26" (1/1) ... [2022-03-20 04:24:26,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79ff89c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:24:26, skipping insertion in model container [2022-03-20 04:24:26,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:24:26" (1/1) ... [2022-03-20 04:24:26,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 04:24:26,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 04:24:26,593 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c[370,383] [2022-03-20 04:24:26,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 04:24:26,623 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 04:24:26,639 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c[370,383] [2022-03-20 04:24:26,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 04:24:26,659 INFO L208 MainTranslator]: Completed translation [2022-03-20 04:24:26,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:24:26 WrapperNode [2022-03-20 04:24:26,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 04:24:26,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 04:24:26,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 04:24:26,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 04:24:26,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:24:26" (1/1) ... [2022-03-20 04:24:26,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:24:26" (1/1) ... [2022-03-20 04:24:26,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:24:26" (1/1) ... [2022-03-20 04:24:26,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:24:26" (1/1) ... [2022-03-20 04:24:26,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:24:26" (1/1) ... [2022-03-20 04:24:26,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:24:26" (1/1) ... [2022-03-20 04:24:26,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:24:26" (1/1) ... [2022-03-20 04:24:26,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 04:24:26,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 04:24:26,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 04:24:26,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 04:24:26,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:24:26" (1/1) ... [2022-03-20 04:24:26,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 04:24:26,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:24:26,731 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) [2022-03-20 04:24:26,752 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 [2022-03-20 04:24:26,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 04:24:26,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 04:24:26,770 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 04:24:26,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 04:24:26,770 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2022-03-20 04:24:26,770 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2022-03-20 04:24:26,770 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 04:24:26,770 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 04:24:26,771 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 04:24:26,771 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 04:24:26,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 04:24:26,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 04:24:26,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 04:24:26,771 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2022-03-20 04:24:26,771 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2022-03-20 04:24:26,771 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 04:24:26,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 04:24:26,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 04:24:26,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 04:24:26,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 04:24:26,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 04:24:26,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 04:24:26,828 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 04:24:26,830 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 04:24:27,014 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 04:24:27,019 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 04:24:27,019 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-03-20 04:24:27,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:24:27 BoogieIcfgContainer [2022-03-20 04:24:27,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 04:24:27,021 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 04:24:27,021 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 04:24:27,022 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 04:24:27,025 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:24:27" (1/1) ... [2022-03-20 04:24:27,027 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 04:24:27,230 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 04:24:27,230 INFO L91 elerationTransformer]: Accelerated Formula: (and (= (+ v_correct_version_~i~0_5 1) v_correct_version_~i~0_4) (= (+ v_correct_version_~b~0_4 v_correct_version_~a_2) v_correct_version_~b~0_3) (< v_correct_version_~b~0_4 v_correct_version_~n_3)) InVars {correct_version_~n=v_correct_version_~n_3, correct_version_~b~0=v_correct_version_~b~0_4, correct_version_~i~0=v_correct_version_~i~0_5, correct_version_~a=v_correct_version_~a_2} OutVars{correct_version_~n=v_correct_version_~n_3, correct_version_~b~0=v_correct_version_~b~0_3, correct_version_~i~0=v_correct_version_~i~0_4, correct_version_~a=v_correct_version_~a_2} AuxVars[] AssignedVars[correct_version_~b~0, correct_version_~i~0] to Formula: (or (and (= v_correct_version_~i~0_5 v_correct_version_~i~0_4) (= v_correct_version_~b~0_3 v_correct_version_~b~0_4) (<= v_correct_version_~n_3 v_correct_version_~b~0_4)) (and (= (+ (* v_correct_version_~a_2 (+ (* (- 1) v_correct_version_~i~0_5) v_correct_version_~i~0_4)) v_correct_version_~b~0_4) v_correct_version_~b~0_3) (< v_correct_version_~i~0_5 v_correct_version_~i~0_4) (forall ((v_it_1 Int)) (or (< (+ v_correct_version_~b~0_4 (* v_it_1 v_correct_version_~a_2)) v_correct_version_~n_3) (not (<= 1 v_it_1)) (not (<= (+ v_it_1 v_correct_version_~i~0_5 1) v_correct_version_~i~0_4)))) (< v_correct_version_~b~0_4 v_correct_version_~n_3))) InVars {correct_version_~n=v_correct_version_~n_3, correct_version_~i~0=v_correct_version_~i~0_5, correct_version_~a=v_correct_version_~a_2, correct_version_~b~0=v_correct_version_~b~0_4} OutVars{correct_version_~n=v_correct_version_~n_3, correct_version_~i~0=v_correct_version_~i~0_4, correct_version_~a=v_correct_version_~a_2, correct_version_~b~0=v_correct_version_~b~0_3} AuxVars[] AssignedVars[correct_version_~b~0, correct_version_~i~0] [2022-03-20 04:24:27,295 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 04:24:27,296 INFO L91 elerationTransformer]: Accelerated Formula: (and (< v_correct_version_~l~0_4 v_correct_version_~m_3) (= (+ v_correct_version_~l~0_4 v_correct_version_~a_3) v_correct_version_~l~0_3) (= (+ v_correct_version_~j~0_4 1) v_correct_version_~j~0_3)) InVars {correct_version_~m=v_correct_version_~m_3, correct_version_~l~0=v_correct_version_~l~0_4, correct_version_~a=v_correct_version_~a_3, correct_version_~j~0=v_correct_version_~j~0_4} OutVars{correct_version_~m=v_correct_version_~m_3, correct_version_~l~0=v_correct_version_~l~0_3, correct_version_~a=v_correct_version_~a_3, correct_version_~j~0=v_correct_version_~j~0_3} AuxVars[] AssignedVars[correct_version_~l~0, correct_version_~j~0] to Formula: (or (and (<= v_correct_version_~m_3 v_correct_version_~l~0_4) (= v_correct_version_~l~0_4 v_correct_version_~l~0_3) (= v_correct_version_~j~0_4 v_correct_version_~j~0_3)) (and (= (+ (* (+ (* (- 1) v_correct_version_~j~0_4) v_correct_version_~j~0_3) v_correct_version_~a_3) v_correct_version_~l~0_4) v_correct_version_~l~0_3) (< v_correct_version_~j~0_4 v_correct_version_~j~0_3) (< v_correct_version_~l~0_4 v_correct_version_~m_3) (forall ((v_it_2 Int)) (or (not (<= 1 v_it_2)) (not (<= (+ v_it_2 v_correct_version_~j~0_4 1) v_correct_version_~j~0_3)) (< (+ (* v_it_2 v_correct_version_~a_3) v_correct_version_~l~0_4) v_correct_version_~m_3))))) InVars {correct_version_~m=v_correct_version_~m_3, correct_version_~l~0=v_correct_version_~l~0_4, correct_version_~a=v_correct_version_~a_3, correct_version_~j~0=v_correct_version_~j~0_4} OutVars{correct_version_~m=v_correct_version_~m_3, correct_version_~l~0=v_correct_version_~l~0_3, correct_version_~a=v_correct_version_~a_3, correct_version_~j~0=v_correct_version_~j~0_3} AuxVars[] AssignedVars[correct_version_~l~0, correct_version_~j~0] [2022-03-20 04:24:27,352 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 04:24:27,353 INFO L91 elerationTransformer]: Accelerated Formula: (and (< v_student_version_~b~1_2 v_student_version_~n_1) (= (+ v_student_version_~i~1_2 1) v_student_version_~i~1_1) (= v_student_version_~b~1_1 (+ v_student_version_~a_1 v_student_version_~b~1_2))) InVars {student_version_~i~1=v_student_version_~i~1_2, student_version_~a=v_student_version_~a_1, student_version_~b~1=v_student_version_~b~1_2, student_version_~n=v_student_version_~n_1} OutVars{student_version_~i~1=v_student_version_~i~1_1, student_version_~a=v_student_version_~a_1, student_version_~b~1=v_student_version_~b~1_1, student_version_~n=v_student_version_~n_1} AuxVars[] AssignedVars[student_version_~i~1, student_version_~b~1] to Formula: (or (and (<= v_student_version_~n_1 v_student_version_~b~1_2) (= v_student_version_~b~1_2 v_student_version_~b~1_1) (= v_student_version_~i~1_2 v_student_version_~i~1_1)) (and (< v_student_version_~i~1_2 v_student_version_~i~1_1) (= (+ v_student_version_~b~1_2 (* (+ v_student_version_~i~1_1 (* (- 1) v_student_version_~i~1_2)) v_student_version_~a_1)) v_student_version_~b~1_1) (< v_student_version_~b~1_2 v_student_version_~n_1) (forall ((v_it_3 Int)) (or (not (<= 1 v_it_3)) (not (<= (+ v_it_3 v_student_version_~i~1_2 1) v_student_version_~i~1_1)) (< (+ v_student_version_~b~1_2 (* v_student_version_~a_1 v_it_3)) v_student_version_~n_1))))) InVars {student_version_~i~1=v_student_version_~i~1_2, student_version_~a=v_student_version_~a_1, student_version_~b~1=v_student_version_~b~1_2, student_version_~n=v_student_version_~n_1} OutVars{student_version_~i~1=v_student_version_~i~1_1, student_version_~a=v_student_version_~a_1, student_version_~b~1=v_student_version_~b~1_1, student_version_~n=v_student_version_~n_1} AuxVars[] AssignedVars[student_version_~i~1, student_version_~b~1] [2022-03-20 04:24:27,405 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 04:24:27,406 INFO L91 elerationTransformer]: Accelerated Formula: (and (= (+ v_student_version_~j~1_2 1) v_student_version_~j~1_1) (< v_student_version_~l~1_3 v_student_version_~m_2) (= (+ v_student_version_~a_2 v_student_version_~l~1_3) v_student_version_~l~1_2)) InVars {student_version_~a=v_student_version_~a_2, student_version_~j~1=v_student_version_~j~1_2, student_version_~l~1=v_student_version_~l~1_3, student_version_~m=v_student_version_~m_2} OutVars{student_version_~a=v_student_version_~a_2, student_version_~j~1=v_student_version_~j~1_1, student_version_~l~1=v_student_version_~l~1_2, student_version_~m=v_student_version_~m_2} AuxVars[] AssignedVars[student_version_~j~1, student_version_~l~1] to Formula: (or (and (= v_student_version_~l~1_3 v_student_version_~l~1_2) (<= v_student_version_~m_2 v_student_version_~l~1_3) (= v_student_version_~j~1_2 v_student_version_~j~1_1)) (and (= (+ v_student_version_~l~1_3 (* (+ v_student_version_~j~1_1 (* (- 1) v_student_version_~j~1_2)) v_student_version_~a_2)) v_student_version_~l~1_2) (< v_student_version_~j~1_2 v_student_version_~j~1_1) (forall ((v_it_4 Int)) (or (not (<= (+ v_it_4 v_student_version_~j~1_2 1) v_student_version_~j~1_1)) (not (<= 1 v_it_4)) (< (+ (* v_student_version_~a_2 v_it_4) v_student_version_~l~1_3) v_student_version_~m_2))) (< v_student_version_~l~1_3 v_student_version_~m_2))) InVars {student_version_~l~1=v_student_version_~l~1_3, student_version_~a=v_student_version_~a_2, student_version_~j~1=v_student_version_~j~1_2, student_version_~m=v_student_version_~m_2} OutVars{student_version_~l~1=v_student_version_~l~1_2, student_version_~a=v_student_version_~a_2, student_version_~j~1=v_student_version_~j~1_1, student_version_~m=v_student_version_~m_2} AuxVars[] AssignedVars[student_version_~j~1, student_version_~l~1] [2022-03-20 04:24:27,495 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 04:24:27,496 INFO L91 elerationTransformer]: Accelerated Formula: (and (< v_correct_version_~x~0_3 v_correct_version_~i~0_3) (= (+ v_correct_version_~j~0_2 v_correct_version_~y~0_2) v_correct_version_~y~0_1) (= (+ v_correct_version_~x~0_3 1) v_correct_version_~x~0_2)) InVars {correct_version_~y~0=v_correct_version_~y~0_2, correct_version_~x~0=v_correct_version_~x~0_3, correct_version_~i~0=v_correct_version_~i~0_3, correct_version_~j~0=v_correct_version_~j~0_2} OutVars{correct_version_~y~0=v_correct_version_~y~0_1, correct_version_~x~0=v_correct_version_~x~0_2, correct_version_~i~0=v_correct_version_~i~0_3, correct_version_~j~0=v_correct_version_~j~0_2} AuxVars[] AssignedVars[correct_version_~y~0, correct_version_~x~0] to Formula: (or (and (< v_correct_version_~x~0_3 v_correct_version_~x~0_2) (= (+ (* v_correct_version_~j~0_2 v_correct_version_~x~0_2) v_correct_version_~y~0_2) (+ v_correct_version_~y~0_1 (* v_correct_version_~j~0_2 v_correct_version_~x~0_3))) (< v_correct_version_~x~0_2 (+ v_correct_version_~i~0_3 1))) (and (= v_correct_version_~y~0_2 v_correct_version_~y~0_1) (= v_correct_version_~x~0_3 v_correct_version_~x~0_2) (<= v_correct_version_~i~0_3 v_correct_version_~x~0_3))) InVars {correct_version_~y~0=v_correct_version_~y~0_2, correct_version_~x~0=v_correct_version_~x~0_3, correct_version_~i~0=v_correct_version_~i~0_3, correct_version_~j~0=v_correct_version_~j~0_2} OutVars{correct_version_~y~0=v_correct_version_~y~0_1, correct_version_~x~0=v_correct_version_~x~0_2, correct_version_~i~0=v_correct_version_~i~0_3, correct_version_~j~0=v_correct_version_~j~0_2} AuxVars[] AssignedVars[correct_version_~y~0, correct_version_~x~0] [2022-03-20 04:24:27,550 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 04:24:27,551 INFO L91 elerationTransformer]: Accelerated Formula: (and (= v_student_version_~x~1_3 (+ v_student_version_~x~1_4 1)) (= v_student_version_~y~1_2 (+ v_student_version_~j~1_4 v_student_version_~y~1_3)) (< v_student_version_~x~1_4 v_student_version_~i~1_5)) InVars {student_version_~i~1=v_student_version_~i~1_5, student_version_~y~1=v_student_version_~y~1_3, student_version_~x~1=v_student_version_~x~1_4, student_version_~j~1=v_student_version_~j~1_4} OutVars{student_version_~i~1=v_student_version_~i~1_5, student_version_~y~1=v_student_version_~y~1_2, student_version_~x~1=v_student_version_~x~1_3, student_version_~j~1=v_student_version_~j~1_4} AuxVars[] AssignedVars[student_version_~y~1, student_version_~x~1] to Formula: (or (and (= (+ v_student_version_~y~1_2 (* v_student_version_~j~1_4 v_student_version_~x~1_4)) (+ v_student_version_~y~1_3 (* v_student_version_~j~1_4 v_student_version_~x~1_3))) (< v_student_version_~x~1_4 v_student_version_~x~1_3) (< v_student_version_~x~1_3 (+ v_student_version_~i~1_5 1))) (and (= v_student_version_~y~1_3 v_student_version_~y~1_2) (not (< v_student_version_~x~1_4 v_student_version_~i~1_5)) (= v_student_version_~x~1_4 v_student_version_~x~1_3))) InVars {student_version_~i~1=v_student_version_~i~1_5, student_version_~y~1=v_student_version_~y~1_3, student_version_~x~1=v_student_version_~x~1_4, student_version_~j~1=v_student_version_~j~1_4} OutVars{student_version_~i~1=v_student_version_~i~1_5, student_version_~y~1=v_student_version_~y~1_2, student_version_~x~1=v_student_version_~x~1_3, student_version_~j~1=v_student_version_~j~1_4} AuxVars[] AssignedVars[student_version_~y~1, student_version_~x~1] [2022-03-20 04:24:27,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 04:24:27 BasicIcfg [2022-03-20 04:24:27,554 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 04:24:27,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 04:24:27,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 04:24:27,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 04:24:27,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 04:24:26" (1/4) ... [2022-03-20 04:24:27,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15899ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:24:27, skipping insertion in model container [2022-03-20 04:24:27,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:24:26" (2/4) ... [2022-03-20 04:24:27,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15899ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:24:27, skipping insertion in model container [2022-03-20 04:24:27,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:24:27" (3/4) ... [2022-03-20 04:24:27,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15899ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 04:24:27, skipping insertion in model container [2022-03-20 04:24:27,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 04:24:27" (4/4) ... [2022-03-20 04:24:27,561 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.cJordan [2022-03-20 04:24:27,565 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 04:24:27,566 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 04:24:27,598 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 04:24:27,603 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 [2022-03-20 04:24:27,603 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 04:24:27,615 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 04:24:27,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 04:24:27,628 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:24:27,628 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:24:27,629 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:24:27,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:24:27,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1121522138, now seen corresponding path program 1 times [2022-03-20 04:24:27,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:24:27,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667461531] [2022-03-20 04:24:27,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:24:27,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:24:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:24:27,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:24:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:24:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:24:27,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:24:27,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667461531] [2022-03-20 04:24:27,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667461531] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:24:27,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:24:27,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 04:24:27,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115614514] [2022-03-20 04:24:27,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:24:27,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 04:24:27,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:24:27,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 04:24:27,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 04:24:27,869 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-03-20 04:24:28,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:24:28,039 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-03-20 04:24:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 04:24:28,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 11 [2022-03-20 04:24:28,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:24:28,052 INFO L225 Difference]: With dead ends: 47 [2022-03-20 04:24:28,052 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 04:24:28,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 04:24:28,060 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 46 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:24:28,061 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 61 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 109 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-03-20 04:24:28,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 04:24:28,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 04:24:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:24:28,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-03-20 04:24:28,091 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2022-03-20 04:24:28,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:24:28,092 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-03-20 04:24:28,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-03-20 04:24:28,093 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-03-20 04:24:28,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 04:24:28,094 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:24:28,094 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:24:28,094 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 04:24:28,095 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:24:28,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:24:28,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1342094697, now seen corresponding path program 1 times [2022-03-20 04:24:28,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:24:28,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867890900] [2022-03-20 04:24:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:24:28,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:24:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:24:28,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:24:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:24:28,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 04:24:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:24:28,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 04:24:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:24:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:24:28,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:24:28,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867890900] [2022-03-20 04:24:28,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867890900] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:24:28,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:24:28,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 04:24:28,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170345638] [2022-03-20 04:24:28,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:24:28,332 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 04:24:28,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:24:28,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 04:24:28,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-03-20 04:24:28,337 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 04:24:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:24:28,671 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-03-20 04:24:28,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 04:24:28,673 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-03-20 04:24:28,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:24:28,675 INFO L225 Difference]: With dead ends: 48 [2022-03-20 04:24:28,675 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 04:24:28,676 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-20 04:24:28,677 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 04:24:28,677 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 80 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 295 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-03-20 04:24:28,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 04:24:28,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-03-20 04:24:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 04:24:28,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-20 04:24:28,692 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 31 [2022-03-20 04:24:28,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:24:28,693 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-20 04:24:28,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 04:24:28,693 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-20 04:24:28,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 04:24:28,696 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:24:28,696 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:24:28,696 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 04:24:28,696 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:24:28,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:24:28,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1260090278, now seen corresponding path program 1 times [2022-03-20 04:24:28,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:24:28,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102419590] [2022-03-20 04:24:28,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:24:28,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:24:28,731 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:24:28,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364388431] [2022-03-20 04:24:28,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:24:28,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:24:28,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:24:28,734 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) [2022-03-20 04:24:28,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 04:24:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:24:28,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 04:24:28,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:24:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 04:24:28,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:24:28,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:24:28,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102419590] [2022-03-20 04:24:28,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:24:28,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364388431] [2022-03-20 04:24:28,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364388431] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:24:28,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:24:28,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 04:24:28,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516636937] [2022-03-20 04:24:28,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:24:28,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 04:24:28,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:24:28,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 04:24:28,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:24:28,940 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:24:28,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:24:28,974 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-03-20 04:24:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 04:24:28,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-03-20 04:24:28,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:24:28,978 INFO L225 Difference]: With dead ends: 53 [2022-03-20 04:24:28,978 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 04:24:28,978 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 04:24:28,981 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:24:28,982 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 1 Unchecked, 0.0s Time] [2022-03-20 04:24:28,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 04:24:28,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-20 04:24:28,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 04:24:28,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-03-20 04:24:28,992 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 32 [2022-03-20 04:24:28,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:24:28,992 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-03-20 04:24:28,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:24:28,992 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-03-20 04:24:28,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 04:24:28,993 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:24:28,993 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:24:29,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 04:24:29,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:24:29,216 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:24:29,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:24:29,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1007047745, now seen corresponding path program 1 times [2022-03-20 04:24:29,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:24:29,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12308900] [2022-03-20 04:24:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:24:29,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:24:29,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:24:29,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219445945] [2022-03-20 04:24:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:24:29,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:24:29,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:24:29,236 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) [2022-03-20 04:24:29,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 04:24:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:24:29,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 04:24:29,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:24:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 04:24:29,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:24:29,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:24:29,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12308900] [2022-03-20 04:24:29,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:24:29,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219445945] [2022-03-20 04:24:29,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219445945] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:24:29,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:24:29,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 04:24:29,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410944663] [2022-03-20 04:24:29,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:24:29,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 04:24:29,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:24:29,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 04:24:29,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:24:29,382 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:24:29,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:24:29,396 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-03-20 04:24:29,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 04:24:29,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-03-20 04:24:29,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:24:29,398 INFO L225 Difference]: With dead ends: 53 [2022-03-20 04:24:29,398 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 04:24:29,398 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 04:24:29,399 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:24:29,399 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 129 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 1 Unchecked, 0.0s Time] [2022-03-20 04:24:29,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 04:24:29,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-20 04:24:29,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.25) internal successors, (40), 34 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 04:24:29,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-03-20 04:24:29,404 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 33 [2022-03-20 04:24:29,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:24:29,404 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-03-20 04:24:29,404 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:24:29,405 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-03-20 04:24:29,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 04:24:29,406 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:24:29,406 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:24:29,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 04:24:29,622 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,SelfDestructingSolverStorable3 [2022-03-20 04:24:29,622 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:24:29,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:24:29,623 INFO L85 PathProgramCache]: Analyzing trace with hash 111102768, now seen corresponding path program 1 times [2022-03-20 04:24:29,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:24:29,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877372119] [2022-03-20 04:24:29,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:24:29,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:24:29,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:24:29,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469902593] [2022-03-20 04:24:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:24:29,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:24:29,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:24:29,641 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) [2022-03-20 04:24:29,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 04:24:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:24:29,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 04:24:29,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:24:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 04:24:29,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:24:29,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:24:29,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877372119] [2022-03-20 04:24:29,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:24:29,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469902593] [2022-03-20 04:24:29,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469902593] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:24:29,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:24:29,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 04:24:29,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010144650] [2022-03-20 04:24:29,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:24:29,775 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 04:24:29,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:24:29,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 04:24:29,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:24:29,776 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 04:24:29,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:24:29,796 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-03-20 04:24:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 04:24:29,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-03-20 04:24:29,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:24:29,798 INFO L225 Difference]: With dead ends: 55 [2022-03-20 04:24:29,798 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 04:24:29,798 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 04:24:29,799 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 10 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:24:29,799 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 131 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 1 Unchecked, 0.0s Time] [2022-03-20 04:24:29,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 04:24:29,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-20 04:24:29,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 04:24:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-03-20 04:24:29,813 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 34 [2022-03-20 04:24:29,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:24:29,814 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-03-20 04:24:29,814 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 04:24:29,814 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-03-20 04:24:29,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 04:24:29,819 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:24:29,820 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:24:29,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 04:24:30,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:24:30,032 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:24:30,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:24:30,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1980049385, now seen corresponding path program 1 times [2022-03-20 04:24:30,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:24:30,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387748071] [2022-03-20 04:24:30,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:24:30,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:24:30,041 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:24:30,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317899852] [2022-03-20 04:24:30,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:24:30,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:24:30,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:24:30,043 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) [2022-03-20 04:24:30,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 04:24:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:24:30,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 04:24:30,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:24:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 04:24:30,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:24:30,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:24:30,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387748071] [2022-03-20 04:24:30,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:24:30,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317899852] [2022-03-20 04:24:30,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317899852] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:24:30,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:24:30,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 04:24:30,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244303281] [2022-03-20 04:24:30,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:24:30,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 04:24:30,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:24:30,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 04:24:30,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:24:30,174 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 04:24:30,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:24:30,188 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-03-20 04:24:30,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 04:24:30,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-03-20 04:24:30,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:24:30,191 INFO L225 Difference]: With dead ends: 55 [2022-03-20 04:24:30,191 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 04:24:30,191 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 04:24:30,191 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:24:30,192 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 129 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 1 Unchecked, 0.0s Time] [2022-03-20 04:24:30,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 04:24:30,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-20 04:24:30,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 36 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 04:24:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-03-20 04:24:30,195 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 35 [2022-03-20 04:24:30,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:24:30,196 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-03-20 04:24:30,196 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 04:24:30,196 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-03-20 04:24:30,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 04:24:30,197 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:24:30,197 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:24:30,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 04:24:30,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:24:30,411 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:24:30,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:24:30,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1173604042, now seen corresponding path program 1 times [2022-03-20 04:24:30,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:24:30,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519239947] [2022-03-20 04:24:30,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:24:30,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:24:30,421 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:24:30,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560709659] [2022-03-20 04:24:30,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:24:30,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:24:30,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:24:30,424 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:24:30,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 04:24:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:24:30,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 04:24:30,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:24:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 04:24:32,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:24:32,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 04:24:32,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:24:32,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519239947] [2022-03-20 04:24:32,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:24:32,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560709659] [2022-03-20 04:24:32,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560709659] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 04:24:32,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:24:32,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2022-03-20 04:24:32,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944963406] [2022-03-20 04:24:32,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:24:32,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 04:24:32,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:24:32,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 04:24:32,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 04:24:32,912 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:24:32,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:24:32,943 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-03-20 04:24:32,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 04:24:32,944 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2022-03-20 04:24:32,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:24:32,945 INFO L225 Difference]: With dead ends: 44 [2022-03-20 04:24:32,946 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 04:24:32,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-20 04:24:32,947 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:24:32,947 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 154 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 5 Unchecked, 0.0s Time] [2022-03-20 04:24:32,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 04:24:32,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2022-03-20 04:24:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:24:32,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-03-20 04:24:32,959 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 36 [2022-03-20 04:24:32,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:24:32,959 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-03-20 04:24:32,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:24:32,960 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-03-20 04:24:32,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 04:24:32,960 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:24:32,960 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:24:32,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 04:24:33,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:24:33,183 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:24:33,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:24:33,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1887612187, now seen corresponding path program 1 times [2022-03-20 04:24:33,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:24:33,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280475050] [2022-03-20 04:24:33,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:24:33,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:24:33,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:24:33,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760308444] [2022-03-20 04:24:33,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:24:33,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:24:33,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:24:33,209 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:24:33,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 04:24:33,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:24:33,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 04:24:33,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:24:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 04:24:39,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:24:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 04:24:39,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:24:39,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280475050] [2022-03-20 04:24:39,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:24:39,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760308444] [2022-03-20 04:24:39,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760308444] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 04:24:39,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:24:39,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2022-03-20 04:24:39,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782424757] [2022-03-20 04:24:39,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:24:39,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 04:24:39,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:24:39,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 04:24:39,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 04:24:39,736 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 04:24:39,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:24:39,772 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-03-20 04:24:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 04:24:39,772 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-03-20 04:24:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:24:39,773 INFO L225 Difference]: With dead ends: 41 [2022-03-20 04:24:39,773 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 04:24:39,773 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-20 04:24:39,774 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:24:39,774 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 147 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 3 Unchecked, 0.0s Time] [2022-03-20 04:24:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 04:24:39,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-20 04:24:39,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:24:39,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-03-20 04:24:39,776 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 36 [2022-03-20 04:24:39,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:24:39,777 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-03-20 04:24:39,777 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 04:24:39,777 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-03-20 04:24:39,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 04:24:39,777 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:24:39,777 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:24:39,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 04:24:39,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:24:39,984 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:24:39,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:24:39,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1698211422, now seen corresponding path program 1 times [2022-03-20 04:24:39,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:24:39,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402828743] [2022-03-20 04:24:39,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:24:39,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:24:39,992 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:24:39,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572013167] [2022-03-20 04:24:39,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:24:39,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:24:39,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:24:39,994 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:24:40,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 04:24:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:24:40,458 WARN L261 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 78 conjunts are in the unsatisfiable core [2022-03-20 04:24:40,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:24:41,680 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:24:42,135 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:24:42,486 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:25:03,573 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:25:04,026 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:25:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:25:45,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:25:48,954 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:25:50,535 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:26:00,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:26:00,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402828743] [2022-03-20 04:26:00,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:26:00,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572013167] [2022-03-20 04:26:00,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572013167] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:26:00,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:26:00,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-03-20 04:26:00,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445955381] [2022-03-20 04:26:00,698 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:26:00,699 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 04:26:00,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:26:00,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 04:26:00,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=794, Unknown=13, NotChecked=0, Total=870 [2022-03-20 04:26:00,700 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 27 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:26:00,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:26:00,902 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-03-20 04:26:00,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 04:26:00,903 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2022-03-20 04:26:00,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:26:00,904 INFO L225 Difference]: With dead ends: 62 [2022-03-20 04:26:00,904 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 04:26:00,904 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=67, Invalid=850, Unknown=13, NotChecked=0, Total=930 [2022-03-20 04:26:00,905 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:26:00,905 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 418 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 95 Unchecked, 0.0s Time] [2022-03-20 04:26:00,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 04:26:00,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-20 04:26:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 48 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 04:26:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-03-20 04:26:00,909 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 37 [2022-03-20 04:26:00,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:26:00,909 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-03-20 04:26:00,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:26:00,909 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-03-20 04:26:00,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 04:26:00,910 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:26:00,910 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:26:00,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 04:26:01,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:26:01,124 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:26:01,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:26:01,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1189593605, now seen corresponding path program 2 times [2022-03-20 04:26:01,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:26:01,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278785255] [2022-03-20 04:26:01,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:26:01,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:26:01,132 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:26:01,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439060858] [2022-03-20 04:26:01,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 04:26:01,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:26:01,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:26:01,136 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:26:01,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 04:26:01,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 04:26:01,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:26:01,731 WARN L261 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 04:26:01,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:26:03,080 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:26:03,565 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:26:03,921 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:26:26,088 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:26:26,349 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:26:27,145 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:26:27,201 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:28:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:28:03,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:28:18,868 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:28:19,356 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:28:22,728 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:28:30,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:28:30,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278785255] [2022-03-20 04:28:30,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:28:30,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439060858] [2022-03-20 04:28:30,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439060858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:28:30,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:28:30,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-03-20 04:28:30,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744620595] [2022-03-20 04:28:30,985 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:28:30,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 04:28:30,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:28:30,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 04:28:30,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=899, Unknown=26, NotChecked=0, Total=992 [2022-03-20 04:28:30,988 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 28 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:28:31,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:28:31,018 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2022-03-20 04:28:31,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 04:28:31,019 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 38 [2022-03-20 04:28:31,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:28:31,020 INFO L225 Difference]: With dead ends: 66 [2022-03-20 04:28:31,021 INFO L226 Difference]: Without dead ends: 62 [2022-03-20 04:28:31,021 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 89.7s TimeCoverageRelationStatistics Valid=67, Invalid=899, Unknown=26, NotChecked=0, Total=992 [2022-03-20 04:28:31,022 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:28:31,022 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 485 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 135 Unchecked, 0.0s Time] [2022-03-20 04:28:31,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-20 04:28:31,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-03-20 04:28:31,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 49 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 04:28:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2022-03-20 04:28:31,027 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 38 [2022-03-20 04:28:31,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:28:31,029 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2022-03-20 04:28:31,029 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:28:31,029 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2022-03-20 04:28:31,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 04:28:31,030 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:28:31,030 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:28:31,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 04:28:31,238 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 04:28:31,239 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:28:31,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:28:31,239 INFO L85 PathProgramCache]: Analyzing trace with hash 764427933, now seen corresponding path program 3 times [2022-03-20 04:28:31,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:28:31,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88227448] [2022-03-20 04:28:31,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:28:31,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:28:31,246 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:28:31,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665751680] [2022-03-20 04:28:31,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 04:28:31,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:28:31,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:28:31,248 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:28:31,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 04:28:32,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-20 04:28:32,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:28:32,704 WARN L261 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 04:28:32,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:28:34,229 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:28:34,697 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:28:35,056 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:29:05,516 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:29:06,507 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:29:09,046 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:30:16,076 WARN L833 $PredicateComparison]: unable to prove that (exists ((main_~m~0 Int) (main_~n~0 Int) (main_~a~0 Int)) (and (<= 1 main_~n~0) (<= 1 main_~m~0) (exists ((student_version_~i~1 Int) (student_version_~j~1 Int)) (and (exists ((v_student_version_~j~1_26 Int)) (and (let ((.cse0 (* main_~a~0 v_student_version_~j~1_26))) (or (and (not (< (* main_~a~0 student_version_~j~1) main_~m~0)) (forall ((v_it_4 Int)) (or (< (+ (* v_it_4 main_~a~0) (* main_~a~0 v_student_version_~j~1_26)) main_~m~0) (not (<= (+ v_it_4 v_student_version_~j~1_26 1) student_version_~j~1)))) (< .cse0 main_~m~0)) (and (<= main_~m~0 .cse0) (= student_version_~j~1 v_student_version_~j~1_26)))) (< 0 v_student_version_~j~1_26) (forall ((v_it_4 Int)) (or (not (<= (+ v_it_4 1) v_student_version_~j~1_26)) (< (* v_it_4 main_~a~0) main_~m~0))))) (forall ((v_it_3 Int)) (or (not (<= (+ v_it_3 1) student_version_~i~1)) (< (* v_it_3 main_~a~0) main_~n~0))) (let ((.cse1 (= student_version_~j~1 0))) (or (and (= |c_main_#t~ret9| 0) .cse1) (let ((.cse2 (div |c_main_#t~ret9| student_version_~j~1))) (and (< .cse2 (+ student_version_~i~1 1)) (not .cse1) (= (mod |c_main_#t~ret9| student_version_~j~1) 0) (not (< .cse2 student_version_~i~1)))))) (not (< (* main_~a~0 student_version_~i~1) main_~n~0)) (< 0 student_version_~i~1))) (exists ((correct_version_~j~0 Int) (correct_version_~i~0 Int)) (let ((.cse3 (div c_main_~n_stones1~0 correct_version_~j~0))) (and (<= main_~n~0 (* correct_version_~i~0 main_~a~0)) (<= correct_version_~i~0 .cse3) (= (mod c_main_~n_stones1~0 correct_version_~j~0) 0) (not (< (* correct_version_~j~0 main_~a~0) main_~m~0)) (forall ((v_it_1 Int)) (or (not (<= (+ v_it_1 1) correct_version_~i~0)) (< (* v_it_1 main_~a~0) main_~n~0))) (< .cse3 (+ correct_version_~i~0 1)) (forall ((v_it_2 Int)) (or (not (<= (+ v_it_2 1) correct_version_~j~0)) (< (* v_it_2 main_~a~0) main_~m~0)))))))) is different from false [2022-03-20 04:33:18,153 WARN L833 $PredicateComparison]: unable to prove that (exists ((correct_version_~j~0 Int) (correct_version_~i~0 Int) (main_~m~0 Int) (main_~n~0 Int) (v_main_~n_stones1~0_BEFORE_CALL_6 Int) (main_~a~0 Int) (student_version_~i~1 Int) (student_version_~j~1 Int) (v_main_~n_stones2~0_BEFORE_CALL_3 Int)) (let ((.cse1 (div v_main_~n_stones1~0_BEFORE_CALL_6 correct_version_~j~0))) (and (<= main_~n~0 (* correct_version_~i~0 main_~a~0)) (<= 1 main_~n~0) (exists ((v_student_version_~j~1_26 Int)) (and (let ((.cse0 (* main_~a~0 v_student_version_~j~1_26))) (or (and (not (< (* main_~a~0 student_version_~j~1) main_~m~0)) (forall ((v_it_4 Int)) (or (< (+ (* v_it_4 main_~a~0) (* main_~a~0 v_student_version_~j~1_26)) main_~m~0) (not (<= (+ v_it_4 v_student_version_~j~1_26 1) student_version_~j~1)))) (< .cse0 main_~m~0)) (and (<= main_~m~0 .cse0) (= student_version_~j~1 v_student_version_~j~1_26)))) (< 0 v_student_version_~j~1_26) (forall ((v_it_4 Int)) (or (not (<= (+ v_it_4 1) v_student_version_~j~1_26)) (< (* v_it_4 main_~a~0) main_~m~0))))) (forall ((v_it_3 Int)) (or (not (<= (+ v_it_3 1) student_version_~i~1)) (< (* v_it_3 main_~a~0) main_~n~0))) (not (< (* correct_version_~j~0 main_~a~0) main_~m~0)) (<= 1 main_~m~0) (= (mod v_main_~n_stones1~0_BEFORE_CALL_6 correct_version_~j~0) 0) (<= correct_version_~i~0 .cse1) (forall ((v_it_1 Int)) (or (not (<= (+ v_it_1 1) correct_version_~i~0)) (< (* v_it_1 main_~a~0) main_~n~0))) (or (<= 1 c___VERIFIER_assert_~cond) (and (not (= v_main_~n_stones1~0_BEFORE_CALL_6 v_main_~n_stones2~0_BEFORE_CALL_3)) (<= 0 c___VERIFIER_assert_~cond))) (not (< (* main_~a~0 student_version_~i~1) main_~n~0)) (< .cse1 (+ correct_version_~i~0 1)) (let ((.cse2 (= student_version_~j~1 0))) (or (and (= v_main_~n_stones2~0_BEFORE_CALL_3 0) .cse2) (let ((.cse3 (div v_main_~n_stones2~0_BEFORE_CALL_3 student_version_~j~1))) (and (= (mod v_main_~n_stones2~0_BEFORE_CALL_3 student_version_~j~1) 0) (not (< .cse3 student_version_~i~1)) (< .cse3 (+ student_version_~i~1 1)) (not .cse2))))) (< 0 student_version_~i~1) (forall ((v_it_2 Int)) (or (not (<= (+ v_it_2 1) correct_version_~j~0)) (< (* v_it_2 main_~a~0) main_~m~0)))))) is different from false [2022-03-20 04:33:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:33:19,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:34:20,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:34:20,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88227448] [2022-03-20 04:34:20,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:34:20,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665751680] [2022-03-20 04:34:20,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665751680] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:34:20,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:34:20,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-03-20 04:34:20,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639653145] [2022-03-20 04:34:20,511 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:34:20,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 04:34:20,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:34:20,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 04:34:20,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=821, Unknown=50, NotChecked=118, Total=1056 [2022-03-20 04:34:20,515 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 28 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:34:20,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:34:20,550 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2022-03-20 04:34:20,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 04:34:20,554 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 38 [2022-03-20 04:34:20,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:34:20,556 INFO L225 Difference]: With dead ends: 70 [2022-03-20 04:34:20,556 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 04:34:20,556 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 125.5s TimeCoverageRelationStatistics Valid=67, Invalid=821, Unknown=50, NotChecked=118, Total=1056 [2022-03-20 04:34:20,557 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:34:20,557 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 519 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 121 Unchecked, 0.0s Time] [2022-03-20 04:34:20,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 04:34:20,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2022-03-20 04:34:20,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.28) internal successors, (64), 52 states have internal predecessors, (64), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 04:34:20,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2022-03-20 04:34:20,560 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 38 [2022-03-20 04:34:20,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:34:20,561 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2022-03-20 04:34:20,561 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:34:20,561 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2022-03-20 04:34:20,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 04:34:20,561 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:34:20,562 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:34:20,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 04:34:20,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:34:20,774 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:34:20,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:34:20,774 INFO L85 PathProgramCache]: Analyzing trace with hash 504805571, now seen corresponding path program 4 times [2022-03-20 04:34:20,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:34:20,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034729578] [2022-03-20 04:34:20,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:34:20,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:34:20,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:34:20,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389359859] [2022-03-20 04:34:20,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 04:34:20,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:34:20,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:34:20,783 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:34:20,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 04:34:28,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 04:34:28,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:34:28,337 WARN L261 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-20 04:34:28,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:34:31,203 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:34:32,143 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:34:32,638 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:35:18,756 WARN L232 SmtUtils]: Spent 12.37s on a formula simplification. DAG size of input: 48 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 04:35:28,268 WARN L232 SmtUtils]: Spent 8.40s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 04:35:41,835 WARN L232 SmtUtils]: Spent 12.61s on a formula simplification. DAG size of input: 59 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 04:35:42,834 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:35:44,119 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:37:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:37:35,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:37:57,045 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:37:58,373 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:38:01,959 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:38:05,903 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:38:06,898 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:38:10,304 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:38:20,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:38:20,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034729578] [2022-03-20 04:38:20,215 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:38:20,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389359859] [2022-03-20 04:38:20,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389359859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:38:20,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:38:20,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-03-20 04:38:20,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44468042] [2022-03-20 04:38:20,215 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:38:20,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 04:38:20,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:38:20,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 04:38:20,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=964, Unknown=23, NotChecked=0, Total=1056 [2022-03-20 04:38:20,217 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 29 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:38:28,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:38:28,391 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2022-03-20 04:38:28,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 04:38:28,392 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 38 [2022-03-20 04:38:28,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:38:28,393 INFO L225 Difference]: With dead ends: 75 [2022-03-20 04:38:28,393 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 04:38:28,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 135.0s TimeCoverageRelationStatistics Valid=87, Invalid=1220, Unknown=25, NotChecked=0, Total=1332 [2022-03-20 04:38:28,396 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:38:28,396 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 626 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 200 Unchecked, 0.0s Time] [2022-03-20 04:38:28,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 04:38:28,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2022-03-20 04:38:28,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 54 states have internal predecessors, (67), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 04:38:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2022-03-20 04:38:28,401 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 38 [2022-03-20 04:38:28,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:38:28,401 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2022-03-20 04:38:28,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:38:28,402 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2022-03-20 04:38:28,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 04:38:28,402 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:38:28,403 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:38:28,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 04:38:28,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 04:38:28,608 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:38:28,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:38:28,608 INFO L85 PathProgramCache]: Analyzing trace with hash -781171018, now seen corresponding path program 5 times [2022-03-20 04:38:28,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:38:28,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138787341] [2022-03-20 04:38:28,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:38:28,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:38:28,615 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:38:28,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554603338] [2022-03-20 04:38:28,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 04:38:28,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:38:28,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:38:28,622 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:38:28,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 04:38:29,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 04:38:29,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:38:29,876 WARN L261 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 78 conjunts are in the unsatisfiable core [2022-03-20 04:38:29,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:38:34,251 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:38:35,224 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:38:36,876 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:38:37,197 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 04:38:38,166 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful