/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 12:32:49,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 12:32:49,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 12:32:49,731 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 12:32:49,731 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 12:32:49,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 12:32:49,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 12:32:49,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 12:32:49,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 12:32:49,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 12:32:49,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 12:32:49,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 12:32:49,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 12:32:49,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 12:32:49,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 12:32:49,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 12:32:49,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 12:32:49,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 12:32:49,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 12:32:49,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 12:32:49,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 12:32:49,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 12:32:49,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 12:32:49,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 12:32:49,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 12:32:49,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 12:32:49,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 12:32:49,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 12:32:49,785 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 12:32:49,799 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 12:32:49,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 12:32:49,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 12:32:49,801 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 12:32:49,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 12:32:49,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 12:32:49,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 12:32:49,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 12:32:49,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 12:32:49,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 12:32:49,802 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 12:32:49,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 12:32:49,803 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 12:32:49,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 12:32:49,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 12:32:49,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 12:32:49,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 12:32:49,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 12:32:49,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:32:49,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 12:32:49,804 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 12:32:49,804 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 12:32:49,804 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 12:32:50,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 12:32:50,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 12:32:50,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 12:32:50,035 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 12:32:50,039 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 12:32:50,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2022-01-31 12:32:50,104 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/520a1d838/62e725e343644bb79927fb096d107ef7/FLAGe0df89cc3 [2022-01-31 12:32:50,510 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 12:32:50,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2022-01-31 12:32:50,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/520a1d838/62e725e343644bb79927fb096d107ef7/FLAGe0df89cc3 [2022-01-31 12:32:50,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/520a1d838/62e725e343644bb79927fb096d107ef7 [2022-01-31 12:32:50,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 12:32:50,534 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 12:32:50,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 12:32:50,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 12:32:50,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 12:32:50,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:32:50" (1/1) ... [2022-01-31 12:32:50,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5290c3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:32:50, skipping insertion in model container [2022-01-31 12:32:50,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:32:50" (1/1) ... [2022-01-31 12:32:50,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 12:32:50,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 12:32:50,720 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c[1014,1027] [2022-01-31 12:32:50,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:32:50,729 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 12:32:50,744 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c[1014,1027] [2022-01-31 12:32:50,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:32:50,755 INFO L208 MainTranslator]: Completed translation [2022-01-31 12:32:50,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:32:50 WrapperNode [2022-01-31 12:32:50,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 12:32:50,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 12:32:50,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 12:32:50,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 12:32:50,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:32:50" (1/1) ... [2022-01-31 12:32:50,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:32:50" (1/1) ... [2022-01-31 12:32:50,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:32:50" (1/1) ... [2022-01-31 12:32:50,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:32:50" (1/1) ... [2022-01-31 12:32:50,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:32:50" (1/1) ... [2022-01-31 12:32:50,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:32:50" (1/1) ... [2022-01-31 12:32:50,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:32:50" (1/1) ... [2022-01-31 12:32:50,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 12:32:50,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 12:32:50,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 12:32:50,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 12:32:50,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:32:50" (1/1) ... [2022-01-31 12:32:50,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:32:50,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:32:50,826 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 12:32:50,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 12:32:50,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 12:32:50,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 12:32:50,850 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 12:32:50,850 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 12:32:50,850 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 12:32:50,851 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 12:32:50,851 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 12:32:50,851 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 12:32:50,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 12:32:50,851 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 12:32:50,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 12:32:50,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 12:32:50,851 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 12:32:50,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 12:32:50,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 12:32:50,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 12:32:50,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 12:32:50,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 12:32:50,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 12:32:50,906 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 12:32:50,907 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 12:32:50,981 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 12:32:50,985 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 12:32:50,986 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-31 12:32:50,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:32:50 BoogieIcfgContainer [2022-01-31 12:32:50,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 12:32:50,988 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 12:32:50,988 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 12:32:50,989 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 12:32:50,991 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:32:50" (1/1) ... [2022-01-31 12:32:51,582 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 12:32:51,583 INFO L91 elerationTransformer]: Accelerated Formula: (and (= (+ v_main_~main__i~0_3 1) v_main_~main__i~0_2) (= v_main_~main__sum~0_2 (+ v_main_~main__sum~0_3 v_main_~main__i~0_3)) (<= v_main_~main__i~0_3 v_main_~main__n~0_3)) InVars {main_~main__n~0=v_main_~main__n~0_3, main_~main__sum~0=v_main_~main__sum~0_3, main_~main__i~0=v_main_~main__i~0_3} OutVars{main_~main__n~0=v_main_~main__n~0_3, main_~main__sum~0=v_main_~main__sum~0_2, main_~main__i~0=v_main_~main__i~0_2} AuxVars[] AssignedVars[main_~main__sum~0, main_~main__i~0] to Formula: (let ((.cse1 (* (- 1) v_main_~main__i~0_3))) (or (and (= v_main_~main__i~0_3 v_main_~main__i~0_2) (= v_main_~main__sum~0_3 v_main_~main__sum~0_2) (< v_main_~main__n~0_3 v_main_~main__i~0_3)) (let ((.cse0 (div (+ .cse1 v_main_~main__i~0_2) 2))) (and (<= .cse0 (+ (div (+ (- 1) .cse1 v_main_~main__n~0_3) 2) 1)) (= (mod (+ v_main_~main__i~0_3 v_main_~main__i~0_2) 2) 0) (< 0 .cse0) (= (+ .cse0 v_main_~main__sum~0_2) (+ (* 2 (* .cse0 v_main_~main__i~0_3)) v_main_~main__sum~0_3 (* 2 (* .cse0 .cse0)))))) (let ((.cse2 (div (+ (- 1) .cse1 v_main_~main__i~0_2) 2))) (and (= (mod (+ v_main_~main__i~0_3 v_main_~main__i~0_2 1) 2) 0) (<= .cse2 (div (+ .cse1 v_main_~main__n~0_3) 2)) (<= 0 .cse2) (= v_main_~main__sum~0_2 (+ (* 2 (* .cse2 v_main_~main__i~0_3)) (* (* .cse2 .cse2) 2) v_main_~main__sum~0_3 .cse2 v_main_~main__i~0_3)))))) InVars {main_~main__n~0=v_main_~main__n~0_3, main_~main__sum~0=v_main_~main__sum~0_3, main_~main__i~0=v_main_~main__i~0_3} OutVars{main_~main__n~0=v_main_~main__n~0_3, main_~main__sum~0=v_main_~main__sum~0_2, main_~main__i~0=v_main_~main__i~0_2} AuxVars[] AssignedVars[main_~main__sum~0, main_~main__i~0] [2022-01-31 12:32:51,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:32:51 BasicIcfg [2022-01-31 12:32:51,587 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 12:32:51,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 12:32:51,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 12:32:51,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 12:32:51,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 12:32:50" (1/4) ... [2022-01-31 12:32:51,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4f6596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:32:51, skipping insertion in model container [2022-01-31 12:32:51,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:32:50" (2/4) ... [2022-01-31 12:32:51,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4f6596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:32:51, skipping insertion in model container [2022-01-31 12:32:51,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:32:50" (3/4) ... [2022-01-31 12:32:51,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4f6596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 12:32:51, skipping insertion in model container [2022-01-31 12:32:51,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:32:51" (4/4) ... [2022-01-31 12:32:51,594 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.v+cfa-reducer.cJordan [2022-01-31 12:32:51,598 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 12:32:51,598 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 12:32:51,628 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 12:32:51,634 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 12:32:51,634 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 12:32:51,642 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 12:32:51,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 12:32:51,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:32:51,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:32:51,648 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:32:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:32:51,651 INFO L85 PathProgramCache]: Analyzing trace with hash 323261602, now seen corresponding path program 1 times [2022-01-31 12:32:51,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:32:51,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797357154] [2022-01-31 12:32:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:32:51,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:32:51,728 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 12:32:51,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44925390] [2022-01-31 12:32:51,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:32:51,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:32:51,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:32:51,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:32:51,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 12:32:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:32:51,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 12:32:51,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:32:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:32:51,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 12:32:51,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:32:51,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797357154] [2022-01-31 12:32:51,839 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 12:32:51,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44925390] [2022-01-31 12:32:51,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44925390] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:32:51,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:32:51,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 12:32:51,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920803891] [2022-01-31 12:32:51,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:32:51,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 12:32:51,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:32:51,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 12:32:51,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 12:32:51,868 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:32:51,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:32:51,893 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-01-31 12:32:51,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 12:32:51,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-31 12:32:51,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:32:51,901 INFO L225 Difference]: With dead ends: 19 [2022-01-31 12:32:51,901 INFO L226 Difference]: Without dead ends: 13 [2022-01-31 12:32:51,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 12:32:51,905 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 12:32:51,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 12:32:51,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-01-31 12:32:51,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-01-31 12:32:51,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:32:51,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-01-31 12:32:51,928 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2022-01-31 12:32:51,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:32:51,929 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-01-31 12:32:51,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:32:51,929 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-01-31 12:32:51,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 12:32:51,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:32:51,930 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:32:51,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 12:32:52,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-01-31 12:32:52,154 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:32:52,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:32:52,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1431144312, now seen corresponding path program 1 times [2022-01-31 12:32:52,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:32:52,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279828578] [2022-01-31 12:32:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:32:52,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:32:52,167 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 12:32:52,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605597839] [2022-01-31 12:32:52,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:32:52,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:32:52,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:32:52,169 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:32:52,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 12:32:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:32:52,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 12:32:52,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:32:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:32:55,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:33:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:33:02,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:33:02,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279828578] [2022-01-31 12:33:02,340 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 12:33:02,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605597839] [2022-01-31 12:33:02,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605597839] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:33:02,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 12:33:02,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-01-31 12:33:02,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655602949] [2022-01-31 12:33:02,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 12:33:02,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 12:33:02,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:33:02,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 12:33:02,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=46, Unknown=2, NotChecked=0, Total=72 [2022-01-31 12:33:02,345 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:33:04,408 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 12:33:06,418 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 12:33:10,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:33:10,007 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-01-31 12:33:10,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 12:33:10,008 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 12:33:10,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:33:10,008 INFO L225 Difference]: With dead ends: 15 [2022-01-31 12:33:10,008 INFO L226 Difference]: Without dead ends: 14 [2022-01-31 12:33:10,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=31, Invalid=56, Unknown=3, NotChecked=0, Total=90 [2022-01-31 12:33:10,010 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:33:10,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 50 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 2 Unknown, 7 Unchecked, 4.1s Time] [2022-01-31 12:33:10,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-31 12:33:10,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-31 12:33:10,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:33:10,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-01-31 12:33:10,013 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-01-31 12:33:10,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:33:10,014 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-01-31 12:33:10,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:33:10,014 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-01-31 12:33:10,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 12:33:10,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:33:10,015 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:33:10,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 12:33:10,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-01-31 12:33:10,224 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:33:10,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:33:10,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1415769954, now seen corresponding path program 2 times [2022-01-31 12:33:10,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:33:10,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268753476] [2022-01-31 12:33:10,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:33:10,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:33:10,238 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 12:33:10,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64153915] [2022-01-31 12:33:10,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 12:33:10,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:33:10,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:33:10,256 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:33:10,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 12:33:11,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 12:33:11,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:33:11,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 12:33:11,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:33:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:33:47,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:34:03,967 WARN L838 $PredicateComparison]: unable to prove that (and (or (= (+ c_main_~main__n~0 (* c_main_~main__n~0 c_main_~main__n~0)) (* c_main_~main__sum~0 2)) (not (< c_main_~main__n~0 c_main_~main__i~0))) (forall ((aux_div_aux_mod_v_main_~main__i~0_12_58_81 Int) (aux_div_aux_mod_aux_mod_v_main_~main__i~0_12_58_81_50 Int)) (let ((.cse1 (* (- 1) c_main_~main__i~0)) (.cse0 (* aux_div_aux_mod_aux_mod_v_main_~main__i~0_12_58_81_50 2))) (or (< .cse0 0) (<= (+ 2 (div (+ (- 1) .cse1 c_main_~main__n~0) 2)) (+ aux_div_aux_mod_aux_mod_v_main_~main__i~0_12_58_81_50 aux_div_aux_mod_v_main_~main__i~0_12_58_81)) (<= aux_div_aux_mod_v_main_~main__i~0_12_58_81 0) (and (forall ((aux_div_aux_mod_v_main_~main__i~0_11_64_81 Int) (aux_div_aux_mod_aux_mod_v_main_~main__i~0_11_64_81_50 Int)) (let ((.cse5 (* 2 aux_div_aux_mod_v_main_~main__i~0_12_58_81)) (.cse4 (* aux_div_aux_mod_v_main_~main__i~0_11_64_81 2)) (.cse6 (* aux_div_aux_mod_aux_mod_v_main_~main__i~0_12_58_81_50 2)) (.cse3 (* aux_div_aux_mod_aux_mod_v_main_~main__i~0_11_64_81_50 2))) (or (< (div (+ (* (- 1) c_main_~main__i~0) (* (- 2) aux_div_aux_mod_aux_mod_v_main_~main__i~0_12_58_81_50) c_main_~main__n~0 (* (- 2) aux_div_aux_mod_v_main_~main__i~0_12_58_81)) 2) aux_div_aux_mod_v_main_~main__i~0_11_64_81) (let ((.cse2 (div (+ .cse5 .cse6) 2))) (= (+ c_main_~main__n~0 (* 2 .cse2) (* c_main_~main__n~0 c_main_~main__n~0)) (+ (* (* aux_div_aux_mod_v_main_~main__i~0_11_64_81 aux_div_aux_mod_v_main_~main__i~0_12_58_81) 8) (* (* aux_div_aux_mod_aux_mod_v_main_~main__i~0_11_64_81_50 aux_div_aux_mod_v_main_~main__i~0_11_64_81) 8) (* (* .cse2 c_main_~main__i~0) 4) (* (* .cse2 .cse2) 4) (* 2 c_main_~main__i~0) (* (* aux_div_aux_mod_aux_mod_v_main_~main__i~0_11_64_81_50 aux_div_aux_mod_v_main_~main__i~0_12_58_81) 8) (* (* aux_div_aux_mod_v_main_~main__i~0_11_64_81 c_main_~main__i~0) 4) (* aux_div_aux_mod_aux_mod_v_main_~main__i~0_12_58_81_50 4) .cse3 .cse4 (* (* aux_div_aux_mod_v_main_~main__i~0_11_64_81 aux_div_aux_mod_v_main_~main__i~0_11_64_81) 4) (* (* aux_div_aux_mod_v_main_~main__i~0_11_64_81 aux_div_aux_mod_aux_mod_v_main_~main__i~0_12_58_81_50) 8) (* c_main_~main__sum~0 2) (* aux_div_aux_mod_v_main_~main__i~0_12_58_81 4) (* (* aux_div_aux_mod_aux_mod_v_main_~main__i~0_11_64_81_50 c_main_~main__i~0) 4) (* (* aux_div_aux_mod_aux_mod_v_main_~main__i~0_11_64_81_50 aux_div_aux_mod_aux_mod_v_main_~main__i~0_11_64_81_50) 4) (* (* aux_div_aux_mod_aux_mod_v_main_~main__i~0_11_64_81_50 aux_div_aux_mod_aux_mod_v_main_~main__i~0_12_58_81_50) 8)))) (<= (+ .cse5 .cse3 .cse4 1 c_main_~main__i~0 .cse6) c_main_~main__n~0) (<= 2 .cse3)))) (let ((.cse7 (* 2 aux_div_aux_mod_v_main_~main__i~0_12_58_81))) (or (<= (+ .cse7 c_main_~main__i~0 .cse0) c_main_~main__n~0) (let ((.cse8 (div (+ .cse7 .cse0) 2))) (= (+ c_main_~main__n~0 (* 2 .cse8) (* c_main_~main__n~0 c_main_~main__n~0)) (+ (* (* .cse8 c_main_~main__i~0) 4) (* (* .cse8 .cse8) 4) (* c_main_~main__sum~0 2)))))) (or (<= (+ (div (+ (- 1) .cse1 (* (- 2) aux_div_aux_mod_aux_mod_v_main_~main__i~0_12_58_81_50) c_main_~main__n~0 (* (- 2) aux_div_aux_mod_v_main_~main__i~0_12_58_81)) 2) 1) 0) (forall ((aux_div_v_main_~main__i~0_11_58 Int)) (let ((.cse9 (* (- 1) c_main_~main__i~0)) (.cse10 (* (- 2) aux_div_aux_mod_aux_mod_v_main_~main__i~0_12_58_81_50)) (.cse11 (* (- 2) aux_div_aux_mod_v_main_~main__i~0_12_58_81))) (or (<= (+ 2 (div (+ (- 1) .cse9 .cse10 c_main_~main__n~0 .cse11) 2)) aux_div_v_main_~main__i~0_11_58) (let ((.cse12 (div (+ (* 2 aux_div_aux_mod_v_main_~main__i~0_12_58_81) (* aux_div_aux_mod_aux_mod_v_main_~main__i~0_12_58_81_50 2)) 2))) (= (+ (* 2 aux_div_v_main_~main__i~0_11_58) c_main_~main__n~0 (* 2 .cse12) (* c_main_~main__n~0 c_main_~main__n~0)) (+ (* (* aux_div_v_main_~main__i~0_11_58 aux_div_v_main_~main__i~0_11_58) 4) (* (* .cse12 c_main_~main__i~0) 4) (* 8 (* aux_div_v_main_~main__i~0_11_58 aux_div_aux_mod_v_main_~main__i~0_12_58_81)) (* (* .cse12 .cse12) 4) (* 8 (* aux_div_aux_mod_aux_mod_v_main_~main__i~0_12_58_81_50 aux_div_v_main_~main__i~0_11_58)) (* c_main_~main__sum~0 2) (* (* aux_div_v_main_~main__i~0_11_58 c_main_~main__i~0) 4)))) (<= aux_div_v_main_~main__i~0_11_58 (div (+ .cse9 .cse10 c_main_~main__n~0 .cse11) 2))))))) (<= 2 .cse0)))) (forall ((aux_div_v_main_~main__i~0_12_50 Int)) (or (< aux_div_v_main_~main__i~0_12_50 (+ 1 c_main_~main__i~0)) (< (+ (div (+ (* (- 1) c_main_~main__i~0) c_main_~main__n~0) 2) 1 c_main_~main__i~0) aux_div_v_main_~main__i~0_12_50) (and (or (forall ((aux_div_v_main_~main__i~0_11_58 Int)) (let ((.cse14 (* (- 2) aux_div_v_main_~main__i~0_12_50))) (or (= (+ (* aux_div_v_main_~main__i~0_11_58 6) c_main_~main__n~0 (* c_main_~main__n~0 c_main_~main__n~0) (* (* aux_div_v_main_~main__i~0_11_58 c_main_~main__i~0) 4)) (let ((.cse13 (div (+ (* (- 2) c_main_~main__i~0) (- 2) (* 2 aux_div_v_main_~main__i~0_12_50)) 2))) (+ (* (* .cse13 .cse13) 4) (* (* aux_div_v_main_~main__i~0_11_58 aux_div_v_main_~main__i~0_11_58) 4) (* 4 (* .cse13 c_main_~main__i~0)) (* 2 c_main_~main__i~0) (* 2 .cse13) (* (* aux_div_v_main_~main__i~0_12_50 aux_div_v_main_~main__i~0_11_58) 8) (* c_main_~main__sum~0 2)))) (<= aux_div_v_main_~main__i~0_11_58 (div (+ .cse14 c_main_~main__n~0 1 c_main_~main__i~0) 2)) (<= (+ 2 (div (+ .cse14 c_main_~main__n~0 c_main_~main__i~0) 2)) aux_div_v_main_~main__i~0_11_58)))) (<= (+ (div (+ (* (- 2) aux_div_v_main_~main__i~0_12_50) c_main_~main__n~0 c_main_~main__i~0) 2) 1) 0)) (let ((.cse15 (* 2 aux_div_v_main_~main__i~0_12_50))) (or (<= .cse15 (+ c_main_~main__n~0 1 c_main_~main__i~0)) (= (let ((.cse16 (div (+ (* (- 2) c_main_~main__i~0) (- 2) .cse15) 2))) (+ (* (* .cse16 .cse16) 4) (* 4 (* .cse16 c_main_~main__i~0)) (* 2 c_main_~main__i~0) (* 2 .cse16) (* c_main_~main__sum~0 2))) (+ c_main_~main__n~0 (* c_main_~main__n~0 c_main_~main__n~0))))) (forall ((aux_div_aux_mod_v_main_~main__i~0_11_64_81 Int) (aux_div_aux_mod_aux_mod_v_main_~main__i~0_11_64_81_50 Int)) (let ((.cse17 (* 2 aux_div_v_main_~main__i~0_12_50)) (.cse19 (* aux_div_aux_mod_v_main_~main__i~0_11_64_81 2)) (.cse18 (* aux_div_aux_mod_aux_mod_v_main_~main__i~0_11_64_81_50 2))) (or (< (div (+ (* (- 2) aux_div_v_main_~main__i~0_12_50) c_main_~main__n~0 1 c_main_~main__i~0) 2) aux_div_aux_mod_v_main_~main__i~0_11_64_81) (<= (+ .cse17 .cse18 .cse19) (+ c_main_~main__n~0 c_main_~main__i~0)) (= (let ((.cse20 (div (+ (* (- 2) c_main_~main__i~0) (- 2) .cse17) 2))) (+ (* (* aux_div_aux_mod_aux_mod_v_main_~main__i~0_11_64_81_50 aux_div_aux_mod_v_main_~main__i~0_11_64_81) 8) (* (* .cse20 .cse20) 4) (* 4 (* .cse20 c_main_~main__i~0)) (* aux_div_v_main_~main__i~0_12_50 4) (* 2 .cse20) (* 8 (* aux_div_aux_mod_aux_mod_v_main_~main__i~0_11_64_81_50 aux_div_v_main_~main__i~0_12_50)) (* (* aux_div_aux_mod_v_main_~main__i~0_11_64_81 aux_div_aux_mod_v_main_~main__i~0_11_64_81) 4) (* 8 (* aux_div_aux_mod_v_main_~main__i~0_11_64_81 aux_div_v_main_~main__i~0_12_50)) (* c_main_~main__sum~0 2) (* (* aux_div_aux_mod_aux_mod_v_main_~main__i~0_11_64_81_50 aux_div_aux_mod_aux_mod_v_main_~main__i~0_11_64_81_50) 4))) (+ (* (* aux_div_aux_mod_v_main_~main__i~0_11_64_81 c_main_~main__i~0) 4) 2 c_main_~main__n~0 .cse18 .cse19 (* (* aux_div_aux_mod_aux_mod_v_main_~main__i~0_11_64_81_50 c_main_~main__i~0) 4) (* c_main_~main__n~0 c_main_~main__n~0))) (<= 2 .cse18)))))))) is different from false [2022-01-31 12:34:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-01-31 12:34:09,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:34:09,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268753476] [2022-01-31 12:34:09,302 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 12:34:09,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64153915] [2022-01-31 12:34:09,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64153915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:34:09,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 12:34:09,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-01-31 12:34:09,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771160347] [2022-01-31 12:34:09,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 12:34:09,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 12:34:09,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:34:09,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 12:34:09,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=59, Unknown=5, NotChecked=16, Total=110 [2022-01-31 12:34:09,304 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:34:33,274 WARN L228 SmtUtils]: Spent 20.52s on a formula simplification. DAG size of input: 97 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 12:34:53,433 WARN L228 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 137 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 12:34:53,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:34:53,437 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-01-31 12:34:53,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 12:34:53,438 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 12:34:53,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:34:53,438 INFO L225 Difference]: With dead ends: 16 [2022-01-31 12:34:53,438 INFO L226 Difference]: Without dead ends: 15 [2022-01-31 12:34:53,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 59.5s TimeCoverageRelationStatistics Valid=43, Invalid=82, Unknown=11, NotChecked=20, Total=156 [2022-01-31 12:34:53,440 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 12:34:53,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-01-31 12:34:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-31 12:34:53,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-31 12:34:53,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:34:53,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-01-31 12:34:53,443 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2022-01-31 12:34:53,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:34:53,443 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-01-31 12:34:53,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:34:53,443 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-01-31 12:34:53,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 12:34:53,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:34:53,444 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:34:53,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 12:34:53,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:34:53,645 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:34:53,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:34:53,645 INFO L85 PathProgramCache]: Analyzing trace with hash 939164856, now seen corresponding path program 3 times [2022-01-31 12:34:53,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:34:53,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907282131] [2022-01-31 12:34:53,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:34:53,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:34:53,657 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 12:34:53,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414827812] [2022-01-31 12:34:53,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 12:34:53,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:34:53,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:34:53,659 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) [2022-01-31 12:34:53,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process