/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/array-patterns/array3_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 10:23:53,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 10:23:53,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 10:23:53,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 10:23:53,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 10:23:53,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 10:23:53,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 10:23:53,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 10:23:53,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 10:23:53,944 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 10:23:53,945 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 10:23:53,946 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 10:23:53,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 10:23:53,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 10:23:53,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 10:23:53,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 10:23:53,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 10:23:53,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 10:23:53,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 10:23:53,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 10:23:53,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 10:23:53,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 10:23:53,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 10:23:53,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 10:23:53,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 10:23:53,957 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 10:23:53,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 10:23:53,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 10:23:53,958 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 10:23:53,959 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 10:23:53,959 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 10:23:53,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 10:23:53,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 10:23:53,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 10:23:53,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 10:23:53,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 10:23:53,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 10:23:53,967 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 10:23:53,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 10:23:53,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 10:23:53,968 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 10:23:53,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 10:23:53,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 10:23:53,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 10:23:53,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 10:23:53,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 10:23:53,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 10:23:53,969 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 10:23:53,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 10:23:53,969 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 10:23:53,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 10:23:53,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 10:23:53,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 10:23:53,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 10:23:53,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 10:23:53,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:23:53,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 10:23:53,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 10:23:53,971 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 10:23:53,971 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 10:23:54,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 10:23:54,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 10:23:54,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 10:23:54,150 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 10:23:54,151 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 10:23:54,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array3_pattern.c [2022-01-31 10:23:54,212 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fece8ee07/c7801cf12d2345e0a1f4b9db6e033478/FLAG942c79691 [2022-01-31 10:23:54,556 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 10:23:54,557 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array3_pattern.c [2022-01-31 10:23:54,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fece8ee07/c7801cf12d2345e0a1f4b9db6e033478/FLAG942c79691 [2022-01-31 10:23:54,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fece8ee07/c7801cf12d2345e0a1f4b9db6e033478 [2022-01-31 10:23:54,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 10:23:54,574 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 10:23:54,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 10:23:54,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 10:23:54,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 10:23:54,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:23:54" (1/1) ... [2022-01-31 10:23:54,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@800d62f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:23:54, skipping insertion in model container [2022-01-31 10:23:54,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:23:54" (1/1) ... [2022-01-31 10:23:54,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 10:23:54,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 10:23:54,747 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array3_pattern.c[1393,1406] [2022-01-31 10:23:54,768 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:23:54,773 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 10:23:54,781 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array3_pattern.c[1393,1406] [2022-01-31 10:23:54,789 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:23:54,797 INFO L208 MainTranslator]: Completed translation [2022-01-31 10:23:54,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:23:54 WrapperNode [2022-01-31 10:23:54,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 10:23:54,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 10:23:54,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 10:23:54,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 10:23:54,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:23:54" (1/1) ... [2022-01-31 10:23:54,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:23:54" (1/1) ... [2022-01-31 10:23:54,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:23:54" (1/1) ... [2022-01-31 10:23:54,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:23:54" (1/1) ... [2022-01-31 10:23:54,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:23:54" (1/1) ... [2022-01-31 10:23:54,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:23:54" (1/1) ... [2022-01-31 10:23:54,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:23:54" (1/1) ... [2022-01-31 10:23:54,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 10:23:54,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 10:23:54,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 10:23:54,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 10:23:54,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:23:54" (1/1) ... [2022-01-31 10:23:54,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:23:54,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:23:54,853 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 10:23:54,854 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 10:23:54,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 10:23:54,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 10:23:54,878 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 10:23:54,878 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 10:23:54,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 10:23:54,878 INFO L138 BoogieDeclarations]: Found implementation of procedure square [2022-01-31 10:23:54,878 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 10:23:54,878 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 10:23:54,878 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 10:23:54,878 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 10:23:54,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 10:23:54,878 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 10:23:54,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 10:23:54,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 10:23:54,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-01-31 10:23:54,879 INFO L130 BoogieDeclarations]: Found specification of procedure square [2022-01-31 10:23:54,879 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 10:23:54,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 10:23:54,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 10:23:54,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 10:23:54,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 10:23:54,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 10:23:54,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 10:23:54,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 10:23:54,922 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 10:23:54,923 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 10:23:55,045 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 10:23:55,049 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 10:23:55,049 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 10:23:55,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:23:55 BoogieIcfgContainer [2022-01-31 10:23:55,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 10:23:55,051 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 10:23:55,051 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 10:23:55,052 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 10:23:55,054 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:23:55" (1/1) ... [2022-01-31 10:23:55,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:23:55 BasicIcfg [2022-01-31 10:23:55,078 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 10:23:55,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 10:23:55,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 10:23:55,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 10:23:55,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:23:54" (1/4) ... [2022-01-31 10:23:55,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1250b1fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:23:55, skipping insertion in model container [2022-01-31 10:23:55,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:23:54" (2/4) ... [2022-01-31 10:23:55,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1250b1fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:23:55, skipping insertion in model container [2022-01-31 10:23:55,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:23:55" (3/4) ... [2022-01-31 10:23:55,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1250b1fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:23:55, skipping insertion in model container [2022-01-31 10:23:55,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:23:55" (4/4) ... [2022-01-31 10:23:55,083 INFO L111 eAbstractionObserver]: Analyzing ICFG array3_pattern.cJordan [2022-01-31 10:23:55,086 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 10:23:55,086 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 10:23:55,115 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 10:23:55,119 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 10:23:55,119 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 10:23:55,128 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 27 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:23:55,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 10:23:55,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:23:55,133 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:23:55,134 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:23:55,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:23:55,154 INFO L85 PathProgramCache]: Analyzing trace with hash 813113408, now seen corresponding path program 1 times [2022-01-31 10:23:55,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:23:55,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657813396] [2022-01-31 10:23:55,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:23:55,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:23:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:23:55,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:23:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:23:55,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 10:23:55,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:23:55,313 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 10:23:55,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:23:55,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657813396] [2022-01-31 10:23:55,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657813396] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:23:55,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:23:55,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 10:23:55,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700220539] [2022-01-31 10:23:55,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:23:55,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 10:23:55,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:23:55,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 10:23:55,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:23:55,336 INFO L87 Difference]: Start difference. First operand has 40 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 27 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 10:23:55,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:23:55,399 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-01-31 10:23:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 10:23:55,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-01-31 10:23:55,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:23:55,407 INFO L225 Difference]: With dead ends: 40 [2022-01-31 10:23:55,407 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 10:23:55,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:23:55,411 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:23:55,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 48 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:23:55,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 10:23:55,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-31 10:23:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 10:23:55,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-01-31 10:23:55,435 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 20 [2022-01-31 10:23:55,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:23:55,435 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-01-31 10:23:55,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 10:23:55,435 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-01-31 10:23:55,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 10:23:55,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:23:55,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:23:55,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 10:23:55,437 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:23:55,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:23:55,437 INFO L85 PathProgramCache]: Analyzing trace with hash 203758416, now seen corresponding path program 1 times [2022-01-31 10:23:55,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:23:55,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703505190] [2022-01-31 10:23:55,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:23:55,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:23:55,460 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:23:55,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52091147] [2022-01-31 10:23:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:23:55,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:23:55,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:23:55,468 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 10:23:55,469 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 10:23:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:23:55,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 10:23:55,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:23:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:23:55,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 10:23:55,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:23:55,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703505190] [2022-01-31 10:23:55,607 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:23:55,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52091147] [2022-01-31 10:23:55,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52091147] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:23:55,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:23:55,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 10:23:55,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114652319] [2022-01-31 10:23:55,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:23:55,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 10:23:55,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:23:55,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 10:23:55,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 10:23:55,609 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:23:55,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:23:55,681 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-01-31 10:23:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 10:23:55,682 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 2 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 27 [2022-01-31 10:23:55,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:23:55,684 INFO L225 Difference]: With dead ends: 45 [2022-01-31 10:23:55,684 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 10:23:55,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:23:55,685 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 40 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:23:55,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 87 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:23:55,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 10:23:55,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2022-01-31 10:23:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 10:23:55,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-01-31 10:23:55,699 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 27 [2022-01-31 10:23:55,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:23:55,699 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-01-31 10:23:55,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:23:55,699 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-01-31 10:23:55,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 10:23:55,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:23:55,700 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2022-01-31 10:23:55,717 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 10:23:55,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:23:55,901 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:23:55,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:23:55,902 INFO L85 PathProgramCache]: Analyzing trace with hash -197877942, now seen corresponding path program 1 times [2022-01-31 10:23:55,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:23:55,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312367757] [2022-01-31 10:23:55,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:23:55,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:23:55,939 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:23:55,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888530436] [2022-01-31 10:23:55,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:23:55,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:23:55,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:23:55,956 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 10:23:55,958 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 10:23:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:23:56,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 72 conjunts are in the unsatisfiable core [2022-01-31 10:23:56,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:23:56,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 10:23:56,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:56,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:23:56,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:23:56,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-01-31 10:23:56,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:56,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 166 [2022-01-31 10:23:56,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 158 [2022-01-31 10:23:56,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:56,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:23:56,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 142 [2022-01-31 10:23:56,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:23:56,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 17 [2022-01-31 10:23:56,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:56,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 27 [2022-01-31 10:23:57,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:23:57,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:23:57,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 17 [2022-01-31 10:23:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:23:57,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:24:11,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:24:11,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312367757] [2022-01-31 10:24:11,227 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:24:11,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888530436] [2022-01-31 10:24:11,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888530436] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:24:11,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:24:11,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-01-31 10:24:11,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649133303] [2022-01-31 10:24:11,228 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:24:11,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 10:24:11,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:24:11,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 10:24:11,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=802, Unknown=5, NotChecked=0, Total=930 [2022-01-31 10:24:11,229 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 22 states, 20 states have (on average 1.45) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 10:24:12,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:24:12,178 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2022-01-31 10:24:12,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 10:24:12,179 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.45) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-01-31 10:24:12,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:24:12,181 INFO L225 Difference]: With dead ends: 66 [2022-01-31 10:24:12,181 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 10:24:12,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=187, Invalid=1140, Unknown=5, NotChecked=0, Total=1332 [2022-01-31 10:24:12,182 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 31 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:24:12,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 319 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2022-01-31 10:24:12,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 10:24:12,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-01-31 10:24:12,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 10:24:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2022-01-31 10:24:12,188 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 41 [2022-01-31 10:24:12,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:24:12,189 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2022-01-31 10:24:12,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.45) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 10:24:12,189 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2022-01-31 10:24:12,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 10:24:12,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:24:12,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2022-01-31 10:24:12,208 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 10:24:12,395 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,SelfDestructingSolverStorable2 [2022-01-31 10:24:12,395 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:24:12,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:24:12,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1127602948, now seen corresponding path program 2 times [2022-01-31 10:24:12,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:24:12,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805943161] [2022-01-31 10:24:12,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:24:12,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:24:12,428 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:24:12,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063518114] [2022-01-31 10:24:12,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:24:12,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:24:12,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:24:12,430 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 10:24:12,431 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 10:24:12,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:24:12,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:24:12,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:24:12,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:24:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 10:24:12,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:24:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 10:24:12,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:24:12,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805943161] [2022-01-31 10:24:12,675 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:24:12,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063518114] [2022-01-31 10:24:12,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063518114] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:24:12,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:24:12,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 10:24:12,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306100162] [2022-01-31 10:24:12,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:24:12,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 10:24:12,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:24:12,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 10:24:12,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:24:12,681 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-31 10:24:12,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:24:12,838 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2022-01-31 10:24:12,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 10:24:12,839 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 43 [2022-01-31 10:24:12,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:24:12,840 INFO L225 Difference]: With dead ends: 74 [2022-01-31 10:24:12,840 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 10:24:12,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-01-31 10:24:12,841 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 44 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:24:12,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 181 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:24:12,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 10:24:12,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2022-01-31 10:24:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.108695652173913) internal successors, (51), 47 states have internal predecessors, (51), 12 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:24:12,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2022-01-31 10:24:12,846 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 43 [2022-01-31 10:24:12,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:24:12,849 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2022-01-31 10:24:12,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-31 10:24:12,850 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2022-01-31 10:24:12,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 10:24:12,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:24:12,852 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:24:12,873 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 10:24:13,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:24:13,069 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:24:13,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:24:13,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1101325814, now seen corresponding path program 3 times [2022-01-31 10:24:13,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:24:13,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263644168] [2022-01-31 10:24:13,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:24:13,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:24:13,084 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:24:13,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478253466] [2022-01-31 10:24:13,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:24:13,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:24:13,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:24:13,094 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 10:24:13,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 10:24:13,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 10:24:13,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:24:13,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:24:13,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:24:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 10:24:13,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:24:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 10:24:13,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:24:13,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263644168] [2022-01-31 10:24:13,454 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:24:13,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478253466] [2022-01-31 10:24:13,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478253466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:24:13,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:24:13,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 10:24:13,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973506072] [2022-01-31 10:24:13,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:24:13,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 10:24:13,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:24:13,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 10:24:13,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:24:13,460 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-01-31 10:24:13,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:24:13,556 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2022-01-31 10:24:13,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 10:24:13,556 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 53 [2022-01-31 10:24:13,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:24:13,561 INFO L225 Difference]: With dead ends: 75 [2022-01-31 10:24:13,561 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 10:24:13,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:24:13,563 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 48 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:24:13,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 116 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:24:13,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 10:24:13,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2022-01-31 10:24:13,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:24:13,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2022-01-31 10:24:13,571 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 53 [2022-01-31 10:24:13,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:24:13,571 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2022-01-31 10:24:13,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-01-31 10:24:13,571 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2022-01-31 10:24:13,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 10:24:13,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:24:13,572 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:24:13,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 10:24:13,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:24:13,772 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:24:13,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:24:13,773 INFO L85 PathProgramCache]: Analyzing trace with hash 294555332, now seen corresponding path program 4 times [2022-01-31 10:24:13,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:24:13,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635622526] [2022-01-31 10:24:13,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:24:13,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:24:13,787 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:24:13,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659145939] [2022-01-31 10:24:13,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:24:13,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:24:13,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:24:13,792 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) [2022-01-31 10:24:13,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 10:24:14,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:24:14,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:24:14,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 111 conjunts are in the unsatisfiable core [2022-01-31 10:24:14,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:24:14,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 10:24:14,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:14,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:24:14,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:24:14,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-01-31 10:24:14,310 INFO L353 Elim1Store]: treesize reduction 78, result has 24.3 percent of original size [2022-01-31 10:24:14,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 53 [2022-01-31 10:24:14,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:14,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 180 [2022-01-31 10:24:14,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 165 [2022-01-31 10:24:15,063 INFO L353 Elim1Store]: treesize reduction 413, result has 14.7 percent of original size [2022-01-31 10:24:15,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 141 treesize of output 182 [2022-01-31 10:24:15,101 INFO L353 Elim1Store]: treesize reduction 85, result has 23.4 percent of original size [2022-01-31 10:24:15,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 45 [2022-01-31 10:24:15,234 INFO L353 Elim1Store]: treesize reduction 121, result has 2.4 percent of original size [2022-01-31 10:24:15,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 84 [2022-01-31 10:25:26,137 INFO L353 Elim1Store]: treesize reduction 595, result has 43.9 percent of original size [2022-01-31 10:25:26,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 2 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 57 case distinctions, treesize of input 260 treesize of output 574 [2022-01-31 10:25:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 27 refuted. 1 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 10:25:27,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:25:50,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:25:50,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635622526] [2022-01-31 10:25:50,050 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:25:50,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659145939] [2022-01-31 10:25:50,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659145939] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:25:50,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:25:50,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2022-01-31 10:25:50,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844064305] [2022-01-31 10:25:50,050 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:25:50,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 10:25:50,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:25:50,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 10:25:50,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2019, Unknown=27, NotChecked=0, Total=2256 [2022-01-31 10:25:50,052 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 33 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 23 states have internal predecessors, (38), 7 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 10:25:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:25:57,920 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2022-01-31 10:25:57,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 10:25:57,920 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 23 states have internal predecessors, (38), 7 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 55 [2022-01-31 10:25:57,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:25:57,921 INFO L225 Difference]: With dead ends: 90 [2022-01-31 10:25:57,921 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 10:25:57,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 87.7s TimeCoverageRelationStatistics Valid=268, Invalid=2459, Unknown=29, NotChecked=0, Total=2756 [2022-01-31 10:25:57,923 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 36 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:25:57,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 408 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 131 Invalid, 0 Unknown, 276 Unchecked, 0.2s Time] [2022-01-31 10:25:57,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 10:25:57,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2022-01-31 10:25:57,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 52 states have internal predecessors, (56), 13 states have call successors, (13), 9 states have call predecessors, (13), 7 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 10:25:57,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2022-01-31 10:25:57,928 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 55 [2022-01-31 10:25:57,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:25:57,929 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2022-01-31 10:25:57,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 23 states have internal predecessors, (38), 7 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 10:25:57,929 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2022-01-31 10:25:57,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 10:25:57,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:25:57,930 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:25:57,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 10:25:58,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:25:58,130 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:25:58,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:25:58,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1706540286, now seen corresponding path program 5 times [2022-01-31 10:25:58,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:25:58,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738687529] [2022-01-31 10:25:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:25:58,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:25:58,146 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:25:58,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055525068] [2022-01-31 10:25:58,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:25:58,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:25:58,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:25:58,148 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) [2022-01-31 10:25:58,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 10:25:58,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-31 10:25:58,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:25:58,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:25:58,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:25:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 10:25:58,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:25:58,468 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 10:25:58,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:25:58,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738687529] [2022-01-31 10:25:58,469 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:25:58,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055525068] [2022-01-31 10:25:58,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055525068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:25:58,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:25:58,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:25:58,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322294456] [2022-01-31 10:25:58,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:25:58,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:25:58,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:25:58,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:25:58,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:25:58,470 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-01-31 10:25:58,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:25:58,699 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2022-01-31 10:25:58,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 10:25:58,700 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 57 [2022-01-31 10:25:58,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:25:58,701 INFO L225 Difference]: With dead ends: 118 [2022-01-31 10:25:58,701 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 10:25:58,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-01-31 10:25:58,701 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 49 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:25:58,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 273 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:25:58,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 10:25:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 102. [2022-01-31 10:25:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 73 states have internal predecessors, (77), 21 states have call successors, (21), 11 states have call predecessors, (21), 9 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 10:25:58,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2022-01-31 10:25:58,709 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 57 [2022-01-31 10:25:58,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:25:58,709 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2022-01-31 10:25:58,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-01-31 10:25:58,709 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2022-01-31 10:25:58,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 10:25:58,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:25:58,710 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:25:58,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 10:25:58,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:25:58,911 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:25:58,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:25:58,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1928327060, now seen corresponding path program 1 times [2022-01-31 10:25:58,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:25:58,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352754781] [2022-01-31 10:25:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:25:58,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:25:58,939 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:25:58,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029364622] [2022-01-31 10:25:58,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:25:58,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:25:58,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:25:58,942 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) [2022-01-31 10:25:58,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 10:25:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:25:59,752 WARN L261 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 137 conjunts are in the unsatisfiable core [2022-01-31 10:25:59,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:25:59,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 10:25:59,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:59,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:25:59,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-01-31 10:25:59,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:25:59,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:25:59,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:59,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:59,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2022-01-31 10:26:00,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:00,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 184 [2022-01-31 10:26:00,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 169 [2022-01-31 10:26:00,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:00,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:00,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:00,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:00,553 INFO L353 Elim1Store]: treesize reduction 105, result has 19.8 percent of original size [2022-01-31 10:26:00,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 141 treesize of output 182 [2022-01-31 10:26:00,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:00,593 INFO L353 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-01-31 10:26:00,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 49 [2022-01-31 10:26:00,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:00,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:00,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:00,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:00,632 INFO L353 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2022-01-31 10:26:00,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 134 treesize of output 104 [2022-01-31 10:26:03,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:03,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 243 treesize of output 226 [2022-01-31 10:26:03,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 196 [2022-01-31 10:26:03,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:03,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:03,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:03,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:03,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:03,237 INFO L353 Elim1Store]: treesize reduction 260, result has 9.1 percent of original size [2022-01-31 10:26:03,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 172 treesize of output 216 [2022-01-31 10:26:03,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:03,369 INFO L353 Elim1Store]: treesize reduction 124, result has 35.4 percent of original size [2022-01-31 10:26:03,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 50 treesize of output 98 [2022-01-31 10:26:05,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:05,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:05,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:05,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:05,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:05,654 INFO L353 Elim1Store]: treesize reduction 90, result has 18.9 percent of original size [2022-01-31 10:26:05,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 145 treesize of output 99 [2022-01-31 10:26:34,553 INFO L353 Elim1Store]: treesize reduction 18, result has 77.8 percent of original size [2022-01-31 10:26:34,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 194 treesize of output 157 [2022-01-31 10:26:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 10:26:35,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:27:06,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:27:06,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352754781] [2022-01-31 10:27:06,599 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:27:06,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029364622] [2022-01-31 10:27:06,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029364622] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:27:06,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:27:06,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2022-01-31 10:27:06,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007689856] [2022-01-31 10:27:06,600 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:27:06,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 10:27:06,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:27:06,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 10:27:06,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2579, Unknown=9, NotChecked=0, Total=2862 [2022-01-31 10:27:06,602 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand has 39 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 28 states have internal predecessors, (41), 9 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 10:27:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:27:09,177 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2022-01-31 10:27:09,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 10:27:09,179 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 28 states have internal predecessors, (41), 9 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 63 [2022-01-31 10:27:09,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:27:09,181 INFO L225 Difference]: With dead ends: 139 [2022-01-31 10:27:09,181 INFO L226 Difference]: Without dead ends: 136 [2022-01-31 10:27:09,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=303, Invalid=2880, Unknown=9, NotChecked=0, Total=3192 [2022-01-31 10:27:09,182 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 60 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 10:27:09,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 351 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 116 Unchecked, 0.9s Time] [2022-01-31 10:27:09,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-31 10:27:09,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 122. [2022-01-31 10:27:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 88 states have internal predecessors, (92), 25 states have call successors, (25), 13 states have call predecessors, (25), 11 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 10:27:09,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2022-01-31 10:27:09,191 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 63 [2022-01-31 10:27:09,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:27:09,191 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2022-01-31 10:27:09,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 28 states have internal predecessors, (41), 9 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 10:27:09,191 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2022-01-31 10:27:09,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 10:27:09,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:27:09,192 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:27:09,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-31 10:27:09,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:27:09,411 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:27:09,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:27:09,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1682464124, now seen corresponding path program 6 times [2022-01-31 10:27:09,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:27:09,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551796096] [2022-01-31 10:27:09,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:27:09,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:27:09,423 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:27:09,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1079735375] [2022-01-31 10:27:09,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:27:09,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:27:09,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:27:09,424 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) [2022-01-31 10:27:09,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 10:27:09,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-31 10:27:09,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:27:09,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:27:09,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:27:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 49 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 10:27:10,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:27:11,701 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 10:27:11,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:27:11,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551796096] [2022-01-31 10:27:11,702 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:27:11,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079735375] [2022-01-31 10:27:11,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079735375] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:27:11,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:27:11,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:27:11,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162835015] [2022-01-31 10:27:11,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:27:11,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:27:11,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:27:11,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:27:11,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:27:11,703 INFO L87 Difference]: Start difference. First operand 122 states and 140 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 7 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-01-31 10:27:13,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:27:13,306 INFO L93 Difference]: Finished difference Result 139 states and 157 transitions. [2022-01-31 10:27:13,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 10:27:13,307 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 7 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 67 [2022-01-31 10:27:13,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:27:13,308 INFO L225 Difference]: With dead ends: 139 [2022-01-31 10:27:13,308 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 10:27:13,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-01-31 10:27:13,308 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 65 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:27:13,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 202 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 10:27:13,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 10:27:13,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2022-01-31 10:27:13,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 18 states have call successors, (18), 10 states have call predecessors, (18), 8 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 10:27:13,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2022-01-31 10:27:13,317 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 67 [2022-01-31 10:27:13,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:27:13,317 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2022-01-31 10:27:13,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 7 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-01-31 10:27:13,318 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2022-01-31 10:27:13,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 10:27:13,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:27:13,318 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:27:13,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 10:27:13,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-31 10:27:13,531 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:27:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:27:13,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1891939906, now seen corresponding path program 7 times [2022-01-31 10:27:13,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:27:13,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13749516] [2022-01-31 10:27:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:27:13,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:27:13,560 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:27:13,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411159921] [2022-01-31 10:27:13,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:27:13,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:27:13,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:27:13,564 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) [2022-01-31 10:27:13,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 10:27:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:27:13,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 156 conjunts are in the unsatisfiable core [2022-01-31 10:27:13,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:27:14,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 10:27:14,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:14,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:27:14,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-01-31 10:27:14,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:27:14,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:27:15,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:15,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:15,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2022-01-31 10:27:16,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:16,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:16,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:16,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:16,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:16,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:16,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2022-01-31 10:27:20,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:20,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 194 [2022-01-31 10:27:20,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 172 [2022-01-31 10:27:20,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:20,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:20,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:20,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:20,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:20,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:20,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:21,258 INFO L353 Elim1Store]: treesize reduction 155, result has 22.9 percent of original size [2022-01-31 10:27:21,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 212 [2022-01-31 10:27:21,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:21,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:21,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:21,682 INFO L353 Elim1Store]: treesize reduction 115, result has 26.3 percent of original size [2022-01-31 10:27:21,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 63 [2022-01-31 10:27:24,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:25,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:25,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:25,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:25,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:25,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:25,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:25,129 INFO L353 Elim1Store]: treesize reduction 59, result has 4.8 percent of original size [2022-01-31 10:27:25,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 313 treesize of output 205 [2022-01-31 10:31:20,177 INFO L353 Elim1Store]: treesize reduction 10, result has 87.8 percent of original size [2022-01-31 10:31:20,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 239 treesize of output 185 [2022-01-31 10:31:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 10:31:25,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:32:40,828 WARN L228 SmtUtils]: Spent 5.34s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 10:32:40,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:32:40,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13749516] [2022-01-31 10:32:40,829 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:32:40,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411159921] [2022-01-31 10:32:40,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411159921] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:32:40,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:32:40,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2022-01-31 10:32:40,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266712237] [2022-01-31 10:32:40,830 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:32:40,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 10:32:40,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:32:40,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 10:32:40,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=3262, Unknown=15, NotChecked=0, Total=3540 [2022-01-31 10:32:40,831 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 39 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 29 states have internal predecessors, (41), 10 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:32:53,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:32:53,300 INFO L93 Difference]: Finished difference Result 170 states and 196 transitions. [2022-01-31 10:32:53,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 10:32:53,300 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 29 states have internal predecessors, (41), 10 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 69 [2022-01-31 10:32:53,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:32:53,301 INFO L225 Difference]: With dead ends: 170 [2022-01-31 10:32:53,301 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 10:32:53,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 46 SyntacticMatches, 11 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 136.4s TimeCoverageRelationStatistics Valid=334, Invalid=4207, Unknown=15, NotChecked=0, Total=4556 [2022-01-31 10:32:53,302 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 62 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 647 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:32:53,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 770 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 388 Invalid, 0 Unknown, 647 Unchecked, 3.2s Time] [2022-01-31 10:32:53,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 10:32:53,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 124. [2022-01-31 10:32:53,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 89 states have (on average 1.0786516853932584) internal successors, (96), 90 states have internal predecessors, (96), 24 states have call successors, (24), 12 states have call predecessors, (24), 10 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 10:32:53,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2022-01-31 10:32:53,313 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 69 [2022-01-31 10:32:53,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:32:53,313 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2022-01-31 10:32:53,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 29 states have internal predecessors, (41), 10 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:32:53,313 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2022-01-31 10:32:53,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 10:32:53,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:32:53,314 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:32:53,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-31 10:32:53,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 10:32:53,527 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:32:53,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:32:53,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1066833388, now seen corresponding path program 2 times [2022-01-31 10:32:53,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:32:53,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394848220] [2022-01-31 10:32:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:32:53,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:32:53,544 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:32:53,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134169587] [2022-01-31 10:32:53,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:32:53,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:32:53,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:32:53,546 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) [2022-01-31 10:32:53,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 10:32:54,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:32:54,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:32:54,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 148 conjunts are in the unsatisfiable core [2022-01-31 10:32:54,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:32:54,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 10:32:54,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:54,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:32:54,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-01-31 10:32:54,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:32:54,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:32:55,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:55,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:55,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2022-01-31 10:32:59,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:59,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 184 [2022-01-31 10:32:59,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 169 [2022-01-31 10:32:59,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:59,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:59,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:59,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:00,049 INFO L353 Elim1Store]: treesize reduction 105, result has 19.8 percent of original size [2022-01-31 10:33:00,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 141 treesize of output 182 [2022-01-31 10:33:00,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:00,377 INFO L353 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-01-31 10:33:00,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 49 [2022-01-31 10:33:01,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:01,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:01,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:01,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:01,299 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-01-31 10:33:01,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 157 treesize of output 102 [2022-01-31 10:33:19,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:19,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 285 treesize of output 264 [2022-01-31 10:33:19,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 220 [2022-01-31 10:33:19,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:19,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:19,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:19,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:19,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:19,538 INFO L244 Elim1Store]: Index analysis took 123 ms [2022-01-31 10:33:19,804 INFO L353 Elim1Store]: treesize reduction 260, result has 9.1 percent of original size [2022-01-31 10:33:19,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 192 treesize of output 223 [2022-01-31 10:33:19,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:21,013 INFO L353 Elim1Store]: treesize reduction 140, result has 31.4 percent of original size [2022-01-31 10:33:21,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 66 treesize of output 104 [2022-01-31 10:33:25,783 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 10:33:26,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:27,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:27,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:33:27,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:27,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:27,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:27,049 INFO L244 Elim1Store]: Index analysis took 142 ms [2022-01-31 10:33:27,371 INFO L353 Elim1Store]: treesize reduction 119, result has 34.3 percent of original size [2022-01-31 10:33:27,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 252 treesize of output 210 [2022-01-31 10:34:30,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:30,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:30,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:30,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:30,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:30,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:30,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:30,865 INFO L244 Elim1Store]: Index analysis took 211 ms [2022-01-31 10:34:31,622 INFO L353 Elim1Store]: treesize reduction 238, result has 21.2 percent of original size [2022-01-31 10:34:31,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 425 treesize of output 354 [2022-01-31 10:34:31,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 397 treesize of output 365 [2022-01-31 10:34:31,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:31,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:31,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:31,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:31,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:31,797 INFO L244 Elim1Store]: Index analysis took 121 ms [2022-01-31 10:34:32,084 INFO L353 Elim1Store]: treesize reduction 260, result has 9.1 percent of original size [2022-01-31 10:34:32,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 282 treesize of output 288 [2022-01-31 10:34:45,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:45,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:45,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:45,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:45,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:45,164 INFO L244 Elim1Store]: Index analysis took 126 ms [2022-01-31 10:34:45,536 INFO L353 Elim1Store]: treesize reduction 59, result has 46.8 percent of original size [2022-01-31 10:34:45,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 398 treesize of output 329 [2022-01-31 10:36:42,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:36:42,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 173 treesize of output 127 [2022-01-31 10:36:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 10:36:51,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:37:18,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:37:18,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394848220] [2022-01-31 10:37:18,185 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:37:18,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134169587] [2022-01-31 10:37:18,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134169587] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:37:18,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:37:18,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2022-01-31 10:37:18,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843965637] [2022-01-31 10:37:18,186 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:37:18,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 10:37:18,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:37:18,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 10:37:18,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=2777, Unknown=1, NotChecked=0, Total=3080 [2022-01-31 10:37:18,187 INFO L87 Difference]: Start difference. First operand 124 states and 142 transitions. Second operand has 41 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 29 states have internal predecessors, (47), 10 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:37:19,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:37:19,737 INFO L93 Difference]: Finished difference Result 154 states and 176 transitions. [2022-01-31 10:37:19,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 10:37:19,738 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 29 states have internal predecessors, (47), 10 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 71 [2022-01-31 10:37:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:37:19,739 INFO L225 Difference]: With dead ends: 154 [2022-01-31 10:37:19,739 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 10:37:19,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1981 ImplicationChecksByTransitivity, 44.2s TimeCoverageRelationStatistics Valid=322, Invalid=2983, Unknown=1, NotChecked=0, Total=3306 [2022-01-31 10:37:19,740 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 51 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 10:37:19,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 416 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 259 Unchecked, 0.5s Time] [2022-01-31 10:37:19,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 10:37:19,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2022-01-31 10:37:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 95 states have (on average 1.0736842105263158) internal successors, (102), 96 states have internal predecessors, (102), 25 states have call successors, (25), 13 states have call predecessors, (25), 11 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 10:37:19,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2022-01-31 10:37:19,749 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 71 [2022-01-31 10:37:19,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:37:19,749 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2022-01-31 10:37:19,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 29 states have internal predecessors, (47), 10 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:37:19,750 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2022-01-31 10:37:19,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 10:37:19,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:37:19,751 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:37:19,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 10:37:19,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 10:37:19,959 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:37:19,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:37:19,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1334703496, now seen corresponding path program 8 times [2022-01-31 10:37:19,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:37:19,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002957340] [2022-01-31 10:37:19,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:37:19,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:37:19,971 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:37:19,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892206192] [2022-01-31 10:37:19,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:37:19,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:37:19,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:37:19,972 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) [2022-01-31 10:37:19,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 10:37:20,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:37:20,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:37:20,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 10:37:20,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:37:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-31 10:37:21,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:37:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 10:37:22,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:37:22,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002957340] [2022-01-31 10:37:22,903 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:37:22,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892206192] [2022-01-31 10:37:22,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892206192] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:37:22,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:37:22,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-01-31 10:37:22,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299253285] [2022-01-31 10:37:22,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:37:22,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 10:37:22,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:37:22,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 10:37:22,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-01-31 10:37:22,904 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-01-31 10:37:26,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:37:26,507 INFO L93 Difference]: Finished difference Result 185 states and 214 transitions. [2022-01-31 10:37:26,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 10:37:26,507 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 71 [2022-01-31 10:37:26,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:37:26,508 INFO L225 Difference]: With dead ends: 185 [2022-01-31 10:37:26,508 INFO L226 Difference]: Without dead ends: 185 [2022-01-31 10:37:26,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-01-31 10:37:26,509 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 54 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 10:37:26,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 269 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 10:37:26,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-31 10:37:26,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 168. [2022-01-31 10:37:26,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 119 states have (on average 1.0672268907563025) internal successors, (127), 121 states have internal predecessors, (127), 35 states have call successors, (35), 15 states have call predecessors, (35), 13 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-01-31 10:37:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 195 transitions. [2022-01-31 10:37:26,515 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 195 transitions. Word has length 71 [2022-01-31 10:37:26,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:37:26,516 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 195 transitions. [2022-01-31 10:37:26,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-01-31 10:37:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 195 transitions. [2022-01-31 10:37:26,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 10:37:26,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:37:26,517 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:37:26,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 10:37:26,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 10:37:26,728 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:37:26,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:37:26,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1718203750, now seen corresponding path program 3 times [2022-01-31 10:37:26,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:37:26,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391120671] [2022-01-31 10:37:26,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:37:26,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:37:26,743 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:37:26,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87641889] [2022-01-31 10:37:26,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:37:26,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:37:26,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:37:26,748 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) [2022-01-31 10:37:26,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 10:37:27,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-31 10:37:27,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:37:27,519 WARN L261 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 169 conjunts are in the unsatisfiable core [2022-01-31 10:37:27,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:37:27,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 10:37:27,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:28,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:37:28,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:37:28,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-01-31 10:37:28,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:28,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2022-01-31 10:37:28,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-01-31 10:37:28,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:28,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2022-01-31 10:37:28,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:28,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2022-01-31 10:37:29,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:29,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2022-01-31 10:37:29,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2022-01-31 10:37:29,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:29,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:29,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:29,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2022-01-31 10:37:29,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:29,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:29,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:30,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2022-01-31 10:37:40,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:40,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 202 [2022-01-31 10:37:40,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 178 [2022-01-31 10:37:40,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:40,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:40,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:40,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:40,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:40,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:40,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:40,628 INFO L244 Elim1Store]: Index analysis took 101 ms [2022-01-31 10:37:40,968 INFO L353 Elim1Store]: treesize reduction 163, result has 22.7 percent of original size [2022-01-31 10:37:40,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 216 [2022-01-31 10:37:41,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:41,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:41,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:41,919 INFO L353 Elim1Store]: treesize reduction 114, result has 36.0 percent of original size [2022-01-31 10:37:41,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 90 [2022-01-31 10:37:50,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:50,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:50,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:50,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:50,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:50,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:50,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:37:50,578 INFO L244 Elim1Store]: Index analysis took 106 ms [2022-01-31 10:37:50,812 INFO L353 Elim1Store]: treesize reduction 29, result has 54.7 percent of original size [2022-01-31 10:37:50,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 122