/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-34549b5 [2022-04-06 05:33:30,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 05:33:30,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 05:33:30,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 05:33:30,911 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 05:33:30,918 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 05:33:30,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 05:33:30,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 05:33:30,919 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 05:33:30,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 05:33:30,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 05:33:30,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 05:33:30,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 05:33:30,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 05:33:30,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 05:33:30,920 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 05:33:30,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 05:33:30,921 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 05:33:30,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 05:33:30,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 05:33:30,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 05:33:30,922 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 05:33:30,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 05:33:30,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 05:33:30,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 05:33:30,922 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 05:33:30,923 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 05:33:30,923 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 05:33:31,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 05:33:31,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 05:33:31,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 05:33:31,173 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 05:33:31,173 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 05:33:31,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-04-06 05:33:31,226 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c5eb0ee5/783844326d374013ae80332cc5c0a40a/FLAG032a91c8c [2022-04-06 05:33:31,644 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 05:33:31,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-04-06 05:33:31,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c5eb0ee5/783844326d374013ae80332cc5c0a40a/FLAG032a91c8c [2022-04-06 05:33:31,665 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c5eb0ee5/783844326d374013ae80332cc5c0a40a [2022-04-06 05:33:31,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 05:33:31,669 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 05:33:31,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 05:33:31,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 05:33:31,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 05:33:31,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 05:33:31" (1/1) ... [2022-04-06 05:33:31,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e30cd4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:33:31, skipping insertion in model container [2022-04-06 05:33:31,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 05:33:31" (1/1) ... [2022-04-06 05:33:31,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 05:33:31,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 05:33:31,827 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] [2022-04-06 05:33:31,861 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 05:33:31,875 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 05:33:31,888 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] [2022-04-06 05:33:31,894 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 05:33:31,905 INFO L208 MainTranslator]: Completed translation [2022-04-06 05:33:31,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:33:31 WrapperNode [2022-04-06 05:33:31,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 05:33:31,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 05:33:31,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 05:33:31,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 05:33:31,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:33:31" (1/1) ... [2022-04-06 05:33:31,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:33:31" (1/1) ... [2022-04-06 05:33:31,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:33:31" (1/1) ... [2022-04-06 05:33:31,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:33:31" (1/1) ... [2022-04-06 05:33:31,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:33:31" (1/1) ... [2022-04-06 05:33:31,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:33:31" (1/1) ... [2022-04-06 05:33:31,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:33:31" (1/1) ... [2022-04-06 05:33:31,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 05:33:31,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 05:33:31,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 05:33:31,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 05:33:31,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:33:31" (1/1) ... [2022-04-06 05:33:31,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 05:33:31,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:33:31,956 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 05:33:31,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 05:33:31,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 05:33:31,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 05:33:31,989 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 05:33:31,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 05:33:31,990 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2022-04-06 05:33:31,990 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2022-04-06 05:33:31,990 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 05:33:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 05:33:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 05:33:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 05:33:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 05:33:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 05:33:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 05:33:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2022-04-06 05:33:31,992 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2022-04-06 05:33:31,994 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 05:33:31,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 05:33:31,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 05:33:31,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 05:33:31,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 05:33:31,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 05:33:31,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 05:33:32,048 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 05:33:32,050 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 05:33:32,251 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 05:33:32,257 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 05:33:32,257 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-04-06 05:33:32,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:33:32 BoogieIcfgContainer [2022-04-06 05:33:32,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 05:33:32,259 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 05:33:32,259 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 05:33:32,271 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 05:33:32,277 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:33:32" (1/1) ... [2022-04-06 05:33:32,279 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 05:33:32,555 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 05:33:32,556 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] [2022-04-06 05:33:32,647 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 05:33:32,651 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] [2022-04-06 05:33:32,719 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 05:33:32,719 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] [2022-04-06 05:33:32,772 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 05:33:32,772 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] [2022-04-06 05:33:32,897 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 05:33:32,898 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] [2022-04-06 05:33:32,953 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 05:33:32,954 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] [2022-04-06 05:33:32,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 05:33:32 BasicIcfg [2022-04-06 05:33:32,958 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 05:33:32,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 05:33:32,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 05:33:32,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 05:33:32,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 05:33:31" (1/4) ... [2022-04-06 05:33:32,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5977657f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 05:33:32, skipping insertion in model container [2022-04-06 05:33:32,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:33:31" (2/4) ... [2022-04-06 05:33:32,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5977657f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 05:33:32, skipping insertion in model container [2022-04-06 05:33:32,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:33:32" (3/4) ... [2022-04-06 05:33:32,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5977657f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 05:33:32, skipping insertion in model container [2022-04-06 05:33:32,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 05:33:32" (4/4) ... [2022-04-06 05:33:32,968 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.cJordan [2022-04-06 05:33:32,972 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 05:33:32,973 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 05:33:33,005 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 05:33:33,010 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 05:33:33,010 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 05:33:33,020 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) [2022-04-06 05:33:33,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 05:33:33,027 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:33:33,027 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:33:33,028 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:33:33,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:33:33,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1121522138, now seen corresponding path program 1 times [2022-04-06 05:33:33,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:33:33,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271249352] [2022-04-06 05:33:33,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:33,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:33:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:33,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:33:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:33:33,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:33:33,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271249352] [2022-04-06 05:33:33,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271249352] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:33:33,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 05:33:33,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 05:33:33,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876056083] [2022-04-06 05:33:33,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:33:33,240 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 05:33:33,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:33:33,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 05:33:33,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 05:33:33,277 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) [2022-04-06 05:33:33,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:33:33,475 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-04-06 05:33:33,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 05:33:33,479 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 [2022-04-06 05:33:33,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:33:33,485 INFO L225 Difference]: With dead ends: 47 [2022-04-06 05:33:33,486 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 05:33:33,487 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 [2022-04-06 05:33:33,491 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 [2022-04-06 05:33:33,492 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] [2022-04-06 05:33:33,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 05:33:33,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 05:33:33,523 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) [2022-04-06 05:33:33,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-04-06 05:33:33,525 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2022-04-06 05:33:33,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:33:33,525 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-04-06 05:33:33,525 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) [2022-04-06 05:33:33,525 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-04-06 05:33:33,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 05:33:33,526 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:33:33,526 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] [2022-04-06 05:33:33,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 05:33:33,527 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:33:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:33:33,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1342094697, now seen corresponding path program 1 times [2022-04-06 05:33:33,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:33:33,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449835437] [2022-04-06 05:33:33,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:33,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:33:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:33,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:33:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:33,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 05:33:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:33,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 05:33:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:33:33,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:33:33,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449835437] [2022-04-06 05:33:33,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449835437] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:33:33,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 05:33:33,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 05:33:33,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782375247] [2022-04-06 05:33:33,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:33:33,720 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 05:33:33,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:33:33,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 05:33:33,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-04-06 05:33:33,721 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) [2022-04-06 05:33:34,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:33:34,073 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-04-06 05:33:34,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 05:33:34,074 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 [2022-04-06 05:33:34,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:33:34,077 INFO L225 Difference]: With dead ends: 48 [2022-04-06 05:33:34,077 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 05:33:34,078 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 [2022-04-06 05:33:34,079 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-04-06 05:33:34,080 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] [2022-04-06 05:33:34,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 05:33:34,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-04-06 05:33:34,087 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) [2022-04-06 05:33:34,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-04-06 05:33:34,089 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 31 [2022-04-06 05:33:34,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:33:34,089 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-04-06 05:33:34,089 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) [2022-04-06 05:33:34,089 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-04-06 05:33:34,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 05:33:34,091 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:33:34,091 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] [2022-04-06 05:33:34,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 05:33:34,091 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:33:34,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:33:34,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1260090278, now seen corresponding path program 1 times [2022-04-06 05:33:34,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:33:34,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926149031] [2022-04-06 05:33:34,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:34,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:33:34,108 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:33:34,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864615167] [2022-04-06 05:33:34,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:34,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:33:34,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:33:34,110 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:33:34,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 05:33:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:34,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 05:33:34,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:33:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 05:33:34,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 05:33:34,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:33:34,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926149031] [2022-04-06 05:33:34,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 05:33:34,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864615167] [2022-04-06 05:33:34,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864615167] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:33:34,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 05:33:34,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 05:33:34,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982250631] [2022-04-06 05:33:34,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:33:34,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 05:33:34,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:33:34,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 05:33:34,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 05:33:34,291 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) [2022-04-06 05:33:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:33:34,307 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-04-06 05:33:34,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 05:33:34,324 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 [2022-04-06 05:33:34,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:33:34,325 INFO L225 Difference]: With dead ends: 53 [2022-04-06 05:33:34,325 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 05:33:34,325 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 [2022-04-06 05:33:34,326 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:33:34,326 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 127 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 1 Unchecked, 0.0s Time] [2022-04-06 05:33:34,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 05:33:34,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-04-06 05:33:34,331 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) [2022-04-06 05:33:34,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-04-06 05:33:34,332 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 32 [2022-04-06 05:33:34,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:33:34,332 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-04-06 05:33:34,333 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) [2022-04-06 05:33:34,333 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-04-06 05:33:34,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 05:33:34,334 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:33:34,334 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] [2022-04-06 05:33:34,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 05:33:34,543 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 [2022-04-06 05:33:34,544 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:33:34,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:33:34,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1007047745, now seen corresponding path program 1 times [2022-04-06 05:33:34,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:33:34,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134133062] [2022-04-06 05:33:34,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:34,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:33:34,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:33:34,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983441618] [2022-04-06 05:33:34,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:34,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:33:34,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:33:34,558 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:33:34,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 05:33:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:34,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 05:33:34,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:33:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 05:33:34,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 05:33:34,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:33:34,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134133062] [2022-04-06 05:33:34,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 05:33:34,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983441618] [2022-04-06 05:33:34,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983441618] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:33:34,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 05:33:34,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 05:33:34,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109348285] [2022-04-06 05:33:34,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:33:34,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 05:33:34,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:33:34,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 05:33:34,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 05:33:34,729 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) [2022-04-06 05:33:34,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:33:34,746 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-04-06 05:33:34,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 05:33:34,747 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 [2022-04-06 05:33:34,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:33:34,748 INFO L225 Difference]: With dead ends: 53 [2022-04-06 05:33:34,748 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 05:33:34,748 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 [2022-04-06 05:33:34,749 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:33:34,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 125 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 1 Unchecked, 0.0s Time] [2022-04-06 05:33:34,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 05:33:34,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-04-06 05:33:34,755 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) [2022-04-06 05:33:34,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-04-06 05:33:34,756 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 33 [2022-04-06 05:33:34,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:33:34,756 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-04-06 05:33:34,756 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) [2022-04-06 05:33:34,756 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-04-06 05:33:34,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 05:33:34,757 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:33:34,757 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] [2022-04-06 05:33:34,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 05:33:34,980 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 [2022-04-06 05:33:34,981 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:33:34,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:33:34,981 INFO L85 PathProgramCache]: Analyzing trace with hash 111102768, now seen corresponding path program 1 times [2022-04-06 05:33:34,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:33:34,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27073272] [2022-04-06 05:33:34,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:34,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:33:34,992 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:33:34,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060582958] [2022-04-06 05:33:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:34,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:33:34,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:33:34,994 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:33:35,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 05:33:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:35,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 05:33:35,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:33:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 05:33:35,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 05:33:35,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:33:35,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27073272] [2022-04-06 05:33:35,139 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 05:33:35,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060582958] [2022-04-06 05:33:35,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060582958] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:33:35,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 05:33:35,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 05:33:35,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010083503] [2022-04-06 05:33:35,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:33:35,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 05:33:35,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:33:35,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 05:33:35,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 05:33:35,141 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) [2022-04-06 05:33:35,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:33:35,156 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-04-06 05:33:35,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 05:33:35,157 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 [2022-04-06 05:33:35,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:33:35,157 INFO L225 Difference]: With dead ends: 55 [2022-04-06 05:33:35,158 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 05:33:35,158 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 [2022-04-06 05:33:35,159 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 10 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:33:35,159 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 127 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 1 Unchecked, 0.0s Time] [2022-04-06 05:33:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 05:33:35,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-04-06 05:33:35,163 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) [2022-04-06 05:33:35,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-04-06 05:33:35,164 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 34 [2022-04-06 05:33:35,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:33:35,165 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-04-06 05:33:35,165 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) [2022-04-06 05:33:35,165 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-04-06 05:33:35,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 05:33:35,166 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:33:35,166 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] [2022-04-06 05:33:35,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 05:33:35,375 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 [2022-04-06 05:33:35,376 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:33:35,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:33:35,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1980049385, now seen corresponding path program 1 times [2022-04-06 05:33:35,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:33:35,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339536881] [2022-04-06 05:33:35,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:35,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:33:35,393 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:33:35,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105925976] [2022-04-06 05:33:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:35,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:33:35,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:33:35,408 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:33:35,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 05:33:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:35,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 05:33:35,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:33:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 05:33:35,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 05:33:35,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:33:35,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339536881] [2022-04-06 05:33:35,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 05:33:35,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105925976] [2022-04-06 05:33:35,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105925976] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:33:35,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 05:33:35,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 05:33:35,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877313305] [2022-04-06 05:33:35,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:33:35,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 05:33:35,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:33:35,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 05:33:35,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 05:33:35,539 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) [2022-04-06 05:33:35,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:33:35,559 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-04-06 05:33:35,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 05:33:35,560 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 [2022-04-06 05:33:35,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:33:35,564 INFO L225 Difference]: With dead ends: 55 [2022-04-06 05:33:35,564 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 05:33:35,565 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 [2022-04-06 05:33:35,566 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:33:35,567 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 125 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 1 Unchecked, 0.0s Time] [2022-04-06 05:33:35,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 05:33:35,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-06 05:33:35,579 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) [2022-04-06 05:33:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-04-06 05:33:35,580 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 35 [2022-04-06 05:33:35,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:33:35,580 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-04-06 05:33:35,580 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) [2022-04-06 05:33:35,581 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-04-06 05:33:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 05:33:35,584 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:33:35,584 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] [2022-04-06 05:33:35,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 05:33:35,795 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 [2022-04-06 05:33:35,795 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:33:35,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:33:35,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1173604042, now seen corresponding path program 1 times [2022-04-06 05:33:35,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:33:35,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005385667] [2022-04-06 05:33:35,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:35,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:33:35,813 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:33:35,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010323698] [2022-04-06 05:33:35,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:35,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:33:35,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:33:35,822 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) [2022-04-06 05:33:35,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 05:33:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:35,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 05:33:35,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:33:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 05:33:38,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:33:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 05:33:38,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:33:38,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005385667] [2022-04-06 05:33:38,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 05:33:38,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010323698] [2022-04-06 05:33:38,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010323698] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 05:33:38,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 05:33:38,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2022-04-06 05:33:38,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058500690] [2022-04-06 05:33:38,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:33:38,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 05:33:38,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:33:38,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 05:33:38,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 05:33:38,530 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) [2022-04-06 05:33:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:33:38,574 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-04-06 05:33:38,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 05:33:38,575 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 [2022-04-06 05:33:38,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:33:38,575 INFO L225 Difference]: With dead ends: 44 [2022-04-06 05:33:38,575 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 05:33:38,576 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 [2022-04-06 05:33:38,576 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:33:38,577 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 149 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 6 Unchecked, 0.0s Time] [2022-04-06 05:33:38,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 05:33:38,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2022-04-06 05:33:38,579 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) [2022-04-06 05:33:38,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-04-06 05:33:38,579 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 36 [2022-04-06 05:33:38,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:33:38,580 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-04-06 05:33:38,580 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) [2022-04-06 05:33:38,580 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-04-06 05:33:38,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 05:33:38,580 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:33:38,581 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] [2022-04-06 05:33:38,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 05:33:38,795 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 [2022-04-06 05:33:38,795 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:33:38,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:33:38,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1887612187, now seen corresponding path program 1 times [2022-04-06 05:33:38,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:33:38,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220691853] [2022-04-06 05:33:38,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:38,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:33:38,813 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:33:38,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533692184] [2022-04-06 05:33:38,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:38,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:33:38,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:33:38,815 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) [2022-04-06 05:33:38,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 05:33:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:38,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 05:33:38,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:33:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 05:33:47,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:33:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 05:33:47,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:33:47,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220691853] [2022-04-06 05:33:47,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 05:33:47,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533692184] [2022-04-06 05:33:47,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533692184] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 05:33:47,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 05:33:47,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2022-04-06 05:33:47,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320712808] [2022-04-06 05:33:47,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:33:47,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 05:33:47,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:33:47,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 05:33:47,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 05:33:47,575 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) [2022-04-06 05:33:47,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:33:47,625 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-04-06 05:33:47,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 05:33:47,626 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 [2022-04-06 05:33:47,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:33:47,626 INFO L225 Difference]: With dead ends: 41 [2022-04-06 05:33:47,627 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 05:33:47,627 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 [2022-04-06 05:33:47,627 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:33:47,628 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 142 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 4 Unchecked, 0.0s Time] [2022-04-06 05:33:47,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 05:33:47,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-06 05:33:47,630 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) [2022-04-06 05:33:47,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-04-06 05:33:47,630 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 36 [2022-04-06 05:33:47,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:33:47,630 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-04-06 05:33:47,631 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) [2022-04-06 05:33:47,631 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-04-06 05:33:47,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 05:33:47,631 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:33:47,631 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] [2022-04-06 05:33:47,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 05:33:47,843 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 [2022-04-06 05:33:47,843 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:33:47,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:33:47,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1698211422, now seen corresponding path program 1 times [2022-04-06 05:33:47,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:33:47,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921287536] [2022-04-06 05:33:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:47,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:33:47,852 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:33:47,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988444776] [2022-04-06 05:33:47,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:33:47,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:33:47,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:33:47,860 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) [2022-04-06 05:33:47,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 05:33:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:33:48,322 WARN L261 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 78 conjunts are in the unsatisfiable core [2022-04-06 05:33:48,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:33:49,330 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:33:49,779 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:33:50,147 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:34:12,402 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:34:12,758 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:35:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:35:22,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:35:32,665 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:35:34,174 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:35:47,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:35:47,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921287536] [2022-04-06 05:35:47,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 05:35:47,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988444776] [2022-04-06 05:35:47,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988444776] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:35:47,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 05:35:47,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-04-06 05:35:47,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788463788] [2022-04-06 05:35:47,651 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 05:35:47,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 05:35:47,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:35:47,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 05:35:47,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=842, Unknown=23, NotChecked=0, Total=930 [2022-04-06 05:35:47,652 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) [2022-04-06 05:35:47,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:35:47,663 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-04-06 05:35:47,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 05:35:47,663 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 [2022-04-06 05:35:47,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:35:47,664 INFO L225 Difference]: With dead ends: 62 [2022-04-06 05:35:47,664 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 05:35:47,665 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 75.5s TimeCoverageRelationStatistics Valid=65, Invalid=842, Unknown=23, NotChecked=0, Total=930 [2022-04-06 05:35:47,665 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:35:47,666 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 377 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 126 Unchecked, 0.0s Time] [2022-04-06 05:35:47,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 05:35:47,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-04-06 05:35:47,669 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) [2022-04-06 05:35:47,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-04-06 05:35:47,670 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 37 [2022-04-06 05:35:47,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:35:47,670 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-04-06 05:35:47,670 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) [2022-04-06 05:35:47,670 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-04-06 05:35:47,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 05:35:47,671 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:35:47,671 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] [2022-04-06 05:35:47,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-06 05:35:47,883 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 [2022-04-06 05:35:47,884 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:35:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:35:47,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1189593605, now seen corresponding path program 2 times [2022-04-06 05:35:47,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:35:47,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286782521] [2022-04-06 05:35:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:35:47,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:35:47,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:35:47,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445109793] [2022-04-06 05:35:47,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 05:35:47,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:35:47,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:35:47,906 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) [2022-04-06 05:35:47,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 05:35:48,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 05:35:48,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:35:48,532 WARN L261 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 05:35:48,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:35:49,740 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:35:50,109 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:35:50,414 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:36:11,935 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:36:12,106 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:36:12,875 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:36:12,943 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:37:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:37:07,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:37:14,861 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:37:15,279 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:37:18,596 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:37:28,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:37:28,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286782521] [2022-04-06 05:37:28,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 05:37:28,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445109793] [2022-04-06 05:37:28,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445109793] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:37:28,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 05:37:28,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-04-06 05:37:28,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457640099] [2022-04-06 05:37:28,142 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 05:37:28,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 05:37:28,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:37:28,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 05:37:28,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=849, Unknown=15, NotChecked=0, Total=930 [2022-04-06 05:37:28,143 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) [2022-04-06 05:37:30,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:37:30,487 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2022-04-06 05:37:30,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 05:37:30,487 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 [2022-04-06 05:37:30,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:37:30,488 INFO L225 Difference]: With dead ends: 66 [2022-04-06 05:37:30,488 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 05:37:30,489 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 59.7s TimeCoverageRelationStatistics Valid=74, Invalid=967, Unknown=15, NotChecked=0, Total=1056 [2022-04-06 05:37:30,489 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:37:30,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 482 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 214 Unchecked, 0.0s Time] [2022-04-06 05:37:30,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 05:37:30,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-04-06 05:37:30,493 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) [2022-04-06 05:37:30,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2022-04-06 05:37:30,494 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 38 [2022-04-06 05:37:30,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:37:30,494 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2022-04-06 05:37:30,494 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) [2022-04-06 05:37:30,494 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2022-04-06 05:37:30,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 05:37:30,495 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:37:30,495 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] [2022-04-06 05:37:30,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 05:37:30,702 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 [2022-04-06 05:37:30,702 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:37:30,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:37:30,702 INFO L85 PathProgramCache]: Analyzing trace with hash 764427933, now seen corresponding path program 3 times [2022-04-06 05:37:30,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:37:30,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063873980] [2022-04-06 05:37:30,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:37:30,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:37:30,709 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:37:30,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831992421] [2022-04-06 05:37:30,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 05:37:30,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:37:30,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:37:30,710 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) [2022-04-06 05:37:30,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 05:37:32,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-04-06 05:37:32,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:37:32,131 WARN L261 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 05:37:32,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:37:33,479 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:37:33,896 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:37:34,191 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:37:55,196 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:37:55,800 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:37:57,469 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:38:34,814 WARN L855 $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 true [2022-04-06 05:39:52,273 WARN L833 $PredicateComparison]: unable to prove that (exists ((v_main_~n_stones1~0_BEFORE_CALL_6 Int) (v_main_~n_stones2~0_BEFORE_CALL_3 Int)) (and (or (<= 1 |c___VERIFIER_assert_#in~cond|) (and (not (= v_main_~n_stones1~0_BEFORE_CALL_6 v_main_~n_stones2~0_BEFORE_CALL_3)) (<= 0 |c___VERIFIER_assert_#in~cond|))) (exists ((correct_version_~j~0 Int) (correct_version_~i~0 Int) (main_~m~0 Int) (main_~n~0 Int) (main_~a~0 Int) (student_version_~i~1 Int) (student_version_~j~1 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))) (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 [2022-04-06 05:41:35,710 WARN L833 $PredicateComparison]: unable to prove that (exists ((v_student_version_~j~1_26 Int) (correct_version_~j~0 Int) (main_~m~0 Int) (correct_version_~i~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 ((.cse0 (div v_main_~n_stones2~0_BEFORE_CALL_3 student_version_~j~1)) (.cse2 (div v_main_~n_stones1~0_BEFORE_CALL_6 correct_version_~j~0))) (and (<= main_~n~0 (* correct_version_~i~0 main_~a~0)) (= (mod v_main_~n_stones2~0_BEFORE_CALL_3 student_version_~j~1) 0) (not (< .cse0 student_version_~i~1)) (let ((.cse1 (* 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)))) (< .cse1 main_~m~0)) (and (<= main_~m~0 .cse1) (= student_version_~j~1 v_student_version_~j~1_26)))) (<= 1 main_~n~0) (< 0 v_student_version_~j~1_26) (< .cse0 (+ student_version_~i~1 1)) (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 (= v_main_~n_stones1~0_BEFORE_CALL_6 v_main_~n_stones2~0_BEFORE_CALL_3)) (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 .cse2) (forall ((v_it_1 Int)) (or (not (<= (+ v_it_1 1) correct_version_~i~0)) (< (* v_it_1 main_~a~0) main_~n~0))) (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))) (not (< (* main_~a~0 student_version_~i~1) main_~n~0)) (< .cse2 (+ correct_version_~i~0 1)) (< 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 [2022-04-06 05:41:37,756 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_student_version_~j~1_26 Int) (correct_version_~j~0 Int) (main_~m~0 Int) (correct_version_~i~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 ((.cse0 (div v_main_~n_stones2~0_BEFORE_CALL_3 student_version_~j~1)) (.cse2 (div v_main_~n_stones1~0_BEFORE_CALL_6 correct_version_~j~0))) (and (<= main_~n~0 (* correct_version_~i~0 main_~a~0)) (= (mod v_main_~n_stones2~0_BEFORE_CALL_3 student_version_~j~1) 0) (not (< .cse0 student_version_~i~1)) (let ((.cse1 (* 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)))) (< .cse1 main_~m~0)) (and (<= main_~m~0 .cse1) (= student_version_~j~1 v_student_version_~j~1_26)))) (<= 1 main_~n~0) (< 0 v_student_version_~j~1_26) (< .cse0 (+ student_version_~i~1 1)) (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 (= v_main_~n_stones1~0_BEFORE_CALL_6 v_main_~n_stones2~0_BEFORE_CALL_3)) (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 .cse2) (forall ((v_it_1 Int)) (or (not (<= (+ v_it_1 1) correct_version_~i~0)) (< (* v_it_1 main_~a~0) main_~n~0))) (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))) (not (< (* main_~a~0 student_version_~i~1) main_~n~0)) (< .cse2 (+ correct_version_~i~0 1)) (< 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 true [2022-04-06 05:41:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:41:37,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:42:27,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:42:27,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063873980] [2022-04-06 05:42:27,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 05:42:27,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831992421] [2022-04-06 05:42:27,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831992421] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:42:27,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 05:42:27,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-04-06 05:42:27,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31999148] [2022-04-06 05:42:27,600 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 05:42:27,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 05:42:27,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:42:27,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 05:42:27,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=824, Unknown=48, NotChecked=180, Total=1122 [2022-04-06 05:42:27,601 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 29 states, 25 states have (on average 1.2) 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) [2022-04-06 05:42:27,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:42:27,629 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2022-04-06 05:42:27,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 05:42:27,630 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 1.2) 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 [2022-04-06 05:42:27,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:42:27,632 INFO L225 Difference]: With dead ends: 71 [2022-04-06 05:42:27,632 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 05:42:27,632 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 118.5s TimeCoverageRelationStatistics Valid=70, Invalid=824, Unknown=48, NotChecked=180, Total=1122 [2022-04-06 05:42:27,633 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:42:27,633 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 475 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 317 Unchecked, 0.0s Time] [2022-04-06 05:42:27,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 05:42:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2022-04-06 05:42:27,637 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) [2022-04-06 05:42:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2022-04-06 05:42:27,638 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 38 [2022-04-06 05:42:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:42:27,638 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2022-04-06 05:42:27,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 1.2) 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) [2022-04-06 05:42:27,638 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2022-04-06 05:42:27,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 05:42:27,639 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:42:27,639 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] [2022-04-06 05:42:27,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 05:42:27,847 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 [2022-04-06 05:42:27,847 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:42:27,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:42:27,848 INFO L85 PathProgramCache]: Analyzing trace with hash 504805571, now seen corresponding path program 4 times [2022-04-06 05:42:27,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:42:27,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245475291] [2022-04-06 05:42:27,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:42:27,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:42:27,856 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:42:27,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612793651] [2022-04-06 05:42:27,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 05:42:27,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:42:27,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:42:27,873 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) [2022-04-06 05:42:27,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 05:42:35,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 05:42:35,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:42:35,141 WARN L261 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 05:42:35,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:42:37,151 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:42:37,896 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:42:38,417 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:43:20,377 WARN L232 SmtUtils]: Spent 12.25s 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) [2022-04-06 05:43:25,213 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:43:26,073 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:44:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:44:19,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:44:30,531 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:44:31,472 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:44:34,544 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:44:38,333 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:44:39,023 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:44:41,448 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:44:51,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:44:51,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245475291] [2022-04-06 05:44:51,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 05:44:51,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612793651] [2022-04-06 05:44:51,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612793651] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:44:51,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 05:44:51,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-04-06 05:44:51,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465695547] [2022-04-06 05:44:51,518 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 05:44:51,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 05:44:51,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:44:51,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 05:44:51,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=912, Unknown=14, NotChecked=0, Total=992 [2022-04-06 05:44:51,519 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) [2022-04-06 05:44:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:44:55,357 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2022-04-06 05:44:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 05:44:55,358 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 [2022-04-06 05:44:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:44:55,358 INFO L225 Difference]: With dead ends: 75 [2022-04-06 05:44:55,358 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 05:44:55,359 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 70.3s TimeCoverageRelationStatistics Valid=78, Invalid=1097, Unknown=15, NotChecked=0, Total=1190 [2022-04-06 05:44:55,359 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:44:55,359 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 508 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 181 Unchecked, 0.0s Time] [2022-04-06 05:44:55,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 05:44:55,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2022-04-06 05:44:55,364 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) [2022-04-06 05:44:55,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2022-04-06 05:44:55,365 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 38 [2022-04-06 05:44:55,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:44:55,365 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2022-04-06 05:44:55,365 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) [2022-04-06 05:44:55,365 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2022-04-06 05:44:55,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 05:44:55,366 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:44:55,366 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] [2022-04-06 05:44:55,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-04-06 05:44:55,576 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 [2022-04-06 05:44:55,576 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:44:55,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:44:55,576 INFO L85 PathProgramCache]: Analyzing trace with hash -781171018, now seen corresponding path program 5 times [2022-04-06 05:44:55,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:44:55,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363079181] [2022-04-06 05:44:55,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:44:55,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:44:55,584 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:44:55,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1079313496] [2022-04-06 05:44:55,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 05:44:55,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:44:55,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:44:55,590 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) [2022-04-06 05:44:55,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 05:44:56,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 05:44:56,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:44:56,771 WARN L261 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 78 conjunts are in the unsatisfiable core [2022-04-06 05:44:56,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:44:59,649 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:45:00,443 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:45:01,609 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:45:01,847 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:45:02,602 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:45:36,324 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:45:37,309 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 05:47:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:47:16,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:47:37,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:47:37,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363079181] [2022-04-06 05:47:37,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 05:47:37,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079313496] [2022-04-06 05:47:37,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079313496] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:47:37,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 05:47:37,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-04-06 05:47:37,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330064290] [2022-04-06 05:47:37,675 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 05:47:37,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 05:47:37,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:47:37,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 05:47:37,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=849, Unknown=15, NotChecked=0, Total=930 [2022-04-06 05:47:37,676 INFO L87 Difference]: Start difference. First operand 64 states and 79 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) [2022-04-06 05:47:38,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:47:38,298 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2022-04-06 05:47:38,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 05:47:38,298 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 [2022-04-06 05:47:38,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:47:38,299 INFO L225 Difference]: With dead ends: 77 [2022-04-06 05:47:38,299 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 05:47:38,299 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 60.4s TimeCoverageRelationStatistics Valid=70, Invalid=907, Unknown=15, NotChecked=0, Total=992 [2022-04-06 05:47:38,300 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:47:38,300 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 517 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 199 Unchecked, 0.0s Time] [2022-04-06 05:47:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 05:47:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-04-06 05:47:38,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 62 states have internal predecessors, (74), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 05:47:38,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2022-04-06 05:47:38,304 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 38 [2022-04-06 05:47:38,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:47:38,304 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2022-04-06 05:47:38,304 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) [2022-04-06 05:47:38,304 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2022-04-06 05:47:38,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 05:47:38,305 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:47:38,305 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] [2022-04-06 05:47:38,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 05:47:38,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 05:47:38,513 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:47:38,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:47:38,514 INFO L85 PathProgramCache]: Analyzing trace with hash -910305133, now seen corresponding path program 6 times [2022-04-06 05:47:38,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:47:38,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655456283] [2022-04-06 05:47:38,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:47:38,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:47:38,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:47:38,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082100920] [2022-04-06 05:47:38,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 05:47:38,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:47:38,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:47:38,522 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:47:38,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 05:47:39,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-04-06 05:47:39,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:47:39,354 WARN L261 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 05:47:39,356 INFO L286 TraceCheckSpWp]: Computing forward predicates...