/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-crafted/zero_sum2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:51:44,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:51:44,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:51:44,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 09:51:44,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 09:51:44,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 09:51:44,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 09:51:44,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 09:51:44,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 09:51:44,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 09:51:44,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 09:51:44,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 09:51:44,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:51:44,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:51:44,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:51:44,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:51:44,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:51:44,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:51:44,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:51:45,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:51:45,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:51:45,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:51:45,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:51:45,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:51:45,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 09:51:45,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 09:51:45,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 09:51:45,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 09:51:45,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 09:51:45,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 09:51:45,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 09:51:45,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 09:51:45,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 09:51:45,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 09:51:45,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 09:51:45,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 09:51:45,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 09:51:45,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 09:51:45,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:51:45,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:51:45,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:51:45,018 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:51:45,028 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:51:45,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:51:45,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:51:45,030 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:51:45,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:51:45,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:51:45,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:51:45,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:51:45,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:51:45,030 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:51:45,031 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:51:45,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:51:45,031 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:51:45,031 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:51:45,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:51:45,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:51:45,032 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:51:45,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:51:45,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:51:45,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:51:45,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:51:45,032 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:51:45,033 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:51:45,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:51:45,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:51:45,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:51:45,268 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:51:45,269 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:51:45,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum2.c [2022-01-31 09:51:45,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76078f6ba/f51cc87a178944f299e8ab7344c76c79/FLAG5c4f8f93e [2022-01-31 09:51:45,690 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:51:45,691 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum2.c [2022-01-31 09:51:45,695 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76078f6ba/f51cc87a178944f299e8ab7344c76c79/FLAG5c4f8f93e [2022-01-31 09:51:45,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76078f6ba/f51cc87a178944f299e8ab7344c76c79 [2022-01-31 09:51:45,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:51:45,707 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:51:45,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:51:45,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:51:45,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:51:45,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:51:45" (1/1) ... [2022-01-31 09:51:45,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ac7635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:45, skipping insertion in model container [2022-01-31 09:51:45,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:51:45" (1/1) ... [2022-01-31 09:51:45,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:51:45,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:51:45,832 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-crafted/zero_sum2.c[400,413] [2022-01-31 09:51:45,856 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:51:45,878 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:51:45,898 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-crafted/zero_sum2.c[400,413] [2022-01-31 09:51:45,911 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:51:45,920 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:51:45,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:45 WrapperNode [2022-01-31 09:51:45,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:51:45,921 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:51:45,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:51:45,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:51:45,929 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:45" (1/1) ... [2022-01-31 09:51:45,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:45" (1/1) ... [2022-01-31 09:51:45,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:45" (1/1) ... [2022-01-31 09:51:45,935 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:45" (1/1) ... [2022-01-31 09:51:45,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:45" (1/1) ... [2022-01-31 09:51:45,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:45" (1/1) ... [2022-01-31 09:51:45,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:45" (1/1) ... [2022-01-31 09:51:45,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:51:45,944 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:51:45,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:51:45,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:51:45,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:45" (1/1) ... [2022-01-31 09:51:45,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:51:45,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:45,969 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 09:51:45,971 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 09:51:46,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:51:46,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:51:46,009 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:51:46,009 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 09:51:46,009 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 09:51:46,010 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:51:46,010 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:51:46,010 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:51:46,010 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:51:46,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:51:46,011 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 09:51:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 09:51:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-01-31 09:51:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:51:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 09:51:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:51:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:51:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:51:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:51:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:51:46,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:51:46,059 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:51:46,060 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:51:46,235 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:51:46,239 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:51:46,239 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-31 09:51:46,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:51:46 BoogieIcfgContainer [2022-01-31 09:51:46,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:51:46,241 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:51:46,241 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:51:46,256 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:51:46,258 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:51:46" (1/1) ... [2022-01-31 09:51:46,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:51:46 BasicIcfg [2022-01-31 09:51:46,271 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:51:46,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:51:46,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:51:46,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:51:46,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:51:45" (1/4) ... [2022-01-31 09:51:46,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61fb7697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:51:46, skipping insertion in model container [2022-01-31 09:51:46,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:45" (2/4) ... [2022-01-31 09:51:46,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61fb7697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:51:46, skipping insertion in model container [2022-01-31 09:51:46,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:51:46" (3/4) ... [2022-01-31 09:51:46,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61fb7697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:51:46, skipping insertion in model container [2022-01-31 09:51:46,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:51:46" (4/4) ... [2022-01-31 09:51:46,293 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum2.cJordan [2022-01-31 09:51:46,297 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:51:46,297 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:51:46,358 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:51:46,362 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 09:51:46,363 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:51:46,373 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 26 states have (on average 1.5) internal successors, (39), 27 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:51:46,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 09:51:46,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:46,384 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 09:51:46,384 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:46,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:46,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1132555548, now seen corresponding path program 1 times [2022-01-31 09:51:46,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:46,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383123043] [2022-01-31 09:51:46,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:46,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:46,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:46,578 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 09:51:46,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:46,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383123043] [2022-01-31 09:51:46,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383123043] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:51:46,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:51:46,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 09:51:46,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776214498] [2022-01-31 09:51:46,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:51:46,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:51:46,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:46,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:51:46,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:51:46,612 INFO L87 Difference]: Start difference. First operand has 34 states, 26 states have (on average 1.5) internal successors, (39), 27 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:46,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:46,672 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-01-31 09:51:46,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:51:46,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 09:51:46,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:46,682 INFO L225 Difference]: With dead ends: 34 [2022-01-31 09:51:46,682 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 09:51:46,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 09:51:46,689 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:46,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 43 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:51:46,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 09:51:46,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 09:51:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-31 09:51:46,716 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2022-01-31 09:51:46,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:46,717 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-31 09:51:46,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:46,717 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-31 09:51:46,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 09:51:46,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:46,718 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 09:51:46,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 09:51:46,719 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:46,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:46,722 INFO L85 PathProgramCache]: Analyzing trace with hash -79874720, now seen corresponding path program 1 times [2022-01-31 09:51:46,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:46,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420358950] [2022-01-31 09:51:46,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:46,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:46,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:46,813 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 09:51:46,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:46,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420358950] [2022-01-31 09:51:46,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420358950] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:51:46,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:51:46,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:51:46,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396488836] [2022-01-31 09:51:46,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:51:46,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:51:46,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:46,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:51:46,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:51:46,818 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:46,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:46,866 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-01-31 09:51:46,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:51:46,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 09:51:46,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:46,868 INFO L225 Difference]: With dead ends: 28 [2022-01-31 09:51:46,868 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 09:51:46,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:51:46,872 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:46,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 43 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:51:46,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 09:51:46,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-31 09:51:46,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:46,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 09:51:46,883 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2022-01-31 09:51:46,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:46,884 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 09:51:46,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:46,885 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 09:51:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 09:51:46,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:46,890 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, 1, 1] [2022-01-31 09:51:46,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 09:51:46,891 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:46,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:46,894 INFO L85 PathProgramCache]: Analyzing trace with hash -53665347, now seen corresponding path program 1 times [2022-01-31 09:51:46,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:46,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165990863] [2022-01-31 09:51:46,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:46,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:46,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 09:51:46,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:46,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165990863] [2022-01-31 09:51:46,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165990863] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:51:46,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:51:46,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 09:51:46,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971064034] [2022-01-31 09:51:46,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:51:46,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:51:46,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:46,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:51:46,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:51:46,968 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:47,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:47,051 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-01-31 09:51:47,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 09:51:47,052 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 09:51:47,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:47,055 INFO L225 Difference]: With dead ends: 35 [2022-01-31 09:51:47,055 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 09:51:47,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:51:47,057 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:47,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 27 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:51:47,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 09:51:47,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2022-01-31 09:51:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:47,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-01-31 09:51:47,060 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2022-01-31 09:51:47,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:47,060 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-01-31 09:51:47,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:47,060 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-01-31 09:51:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 09:51:47,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:47,061 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:51:47,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 09:51:47,061 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:47,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:47,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1591567477, now seen corresponding path program 1 times [2022-01-31 09:51:47,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:47,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608533076] [2022-01-31 09:51:47,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:47,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:47,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:51:47,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:47,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608533076] [2022-01-31 09:51:47,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608533076] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:47,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429464439] [2022-01-31 09:51:47,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:47,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:47,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:47,154 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 09:51:47,155 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 09:51:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:47,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:51:47,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:51:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:51:47,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:51:47,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:51:47,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429464439] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:51:47,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:51:47,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 09:51:47,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252673852] [2022-01-31 09:51:47,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:51:47,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 09:51:47,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:47,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 09:51:47,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:51:47,387 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:47,421 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-01-31 09:51:47,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 09:51:47,421 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 09:51:47,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:47,422 INFO L225 Difference]: With dead ends: 34 [2022-01-31 09:51:47,422 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 09:51:47,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:51:47,423 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:47,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 56 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:51:47,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 09:51:47,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-01-31 09:51:47,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:47,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-01-31 09:51:47,426 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 30 [2022-01-31 09:51:47,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:47,426 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-01-31 09:51:47,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:47,426 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-01-31 09:51:47,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 09:51:47,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:47,427 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 09:51:47,460 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 09:51:47,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:47,661 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:47,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:47,661 INFO L85 PathProgramCache]: Analyzing trace with hash -443858798, now seen corresponding path program 2 times [2022-01-31 09:51:47,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:47,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532936063] [2022-01-31 09:51:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:47,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:47,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 09:51:47,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:47,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532936063] [2022-01-31 09:51:47,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532936063] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:47,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085723112] [2022-01-31 09:51:47,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:51:47,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:47,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:47,707 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 09:51:47,708 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 09:51:47,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:51:47,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:51:47,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:51:47,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:51:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 09:51:47,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:51:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 09:51:47,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085723112] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:51:47,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:51:47,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-31 09:51:47,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118753765] [2022-01-31 09:51:47,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:51:47,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 09:51:47,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:47,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 09:51:47,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 09:51:47,884 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:47,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:47,950 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-01-31 09:51:47,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 09:51:47,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 09:51:47,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:47,951 INFO L225 Difference]: With dead ends: 45 [2022-01-31 09:51:47,951 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 09:51:47,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-31 09:51:47,952 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:47,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 27 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:51:47,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 09:51:47,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2022-01-31 09:51:47,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:47,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-01-31 09:51:47,955 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2022-01-31 09:51:47,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:47,955 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-01-31 09:51:47,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:47,955 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-01-31 09:51:47,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 09:51:47,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:47,956 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 09:51:47,975 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 09:51:48,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:48,173 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:48,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:48,174 INFO L85 PathProgramCache]: Analyzing trace with hash 393956938, now seen corresponding path program 3 times [2022-01-31 09:51:48,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:48,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574804925] [2022-01-31 09:51:48,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:48,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:48,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:51:48,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:48,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574804925] [2022-01-31 09:51:48,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574804925] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:48,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224697124] [2022-01-31 09:51:48,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:51:48,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:48,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:48,855 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 09:51:48,885 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 09:51:48,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 09:51:48,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:51:48,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-31 09:51:48,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:51:49,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:51:49,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:51:49,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2022-01-31 09:51:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:51:50,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:51:53,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:51:53,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 74 treesize of output 103 [2022-01-31 09:51:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:51:54,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224697124] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:51:54,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:51:54,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 27] total 59 [2022-01-31 09:51:54,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518984275] [2022-01-31 09:51:54,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:51:54,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 09:51:54,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:54,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 09:51:54,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=3096, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 09:51:54,177 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 59 states, 59 states have (on average 1.6779661016949152) internal successors, (99), 56 states have internal predecessors, (99), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:56,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:56,093 INFO L93 Difference]: Finished difference Result 117 states and 134 transitions. [2022-01-31 09:51:56,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 09:51:56,093 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.6779661016949152) internal successors, (99), 56 states have internal predecessors, (99), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 09:51:56,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:56,096 INFO L225 Difference]: With dead ends: 117 [2022-01-31 09:51:56,096 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 09:51:56,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 45 SyntacticMatches, 16 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2693 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=818, Invalid=7924, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 09:51:56,099 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 69 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 461 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:56,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 194 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 321 Invalid, 0 Unknown, 461 Unchecked, 0.1s Time] [2022-01-31 09:51:56,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 09:51:56,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 58. [2022-01-31 09:51:56,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:56,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2022-01-31 09:51:56,104 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 40 [2022-01-31 09:51:56,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:56,104 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2022-01-31 09:51:56,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.6779661016949152) internal successors, (99), 56 states have internal predecessors, (99), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:56,105 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2022-01-31 09:51:56,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 09:51:56,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:56,105 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-31 09:51:56,123 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 09:51:56,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:56,319 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:56,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:56,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1546893320, now seen corresponding path program 4 times [2022-01-31 09:51:56,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:56,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620864406] [2022-01-31 09:51:56,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:56,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:56,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:51:56,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:56,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620864406] [2022-01-31 09:51:56,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620864406] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:56,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283996077] [2022-01-31 09:51:56,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:51:56,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:56,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:56,385 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 09:51:56,386 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 09:51:56,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:51:56,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:51:56,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 09:51:56,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:51:56,529 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:51:56,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:51:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:51:56,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283996077] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:51:56,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:51:56,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-31 09:51:56,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921726306] [2022-01-31 09:51:56,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:51:56,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 09:51:56,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:56,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 09:51:56,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-01-31 09:51:56,618 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:56,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:56,753 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2022-01-31 09:51:56,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 09:51:56,753 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 09:51:56,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:56,754 INFO L225 Difference]: With dead ends: 85 [2022-01-31 09:51:56,754 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 09:51:56,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-31 09:51:56,755 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:56,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 72 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:51:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 09:51:56,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-01-31 09:51:56,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:56,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2022-01-31 09:51:56,758 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 42 [2022-01-31 09:51:56,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:56,758 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2022-01-31 09:51:56,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:56,759 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2022-01-31 09:51:56,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 09:51:56,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:56,759 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-01-31 09:51:56,778 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 09:51:56,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:56,964 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:56,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:56,964 INFO L85 PathProgramCache]: Analyzing trace with hash -439398235, now seen corresponding path program 5 times [2022-01-31 09:51:56,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:56,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591384690] [2022-01-31 09:51:56,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:56,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:57,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 09:51:57,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:57,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591384690] [2022-01-31 09:51:57,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591384690] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:57,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91514198] [2022-01-31 09:51:57,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:51:57,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:57,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:57,043 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 09:51:57,044 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 09:51:57,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 09:51:57,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:51:57,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 09:51:57,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:51:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 09:51:57,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:51:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 09:51:57,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91514198] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:51:57,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:51:57,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-31 09:51:57,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144816238] [2022-01-31 09:51:57,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:51:57,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 09:51:57,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:57,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 09:51:57,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-31 09:51:57,325 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:57,564 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-01-31 09:51:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 09:51:57,565 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 09:51:57,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:57,565 INFO L225 Difference]: With dead ends: 55 [2022-01-31 09:51:57,565 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 09:51:57,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-01-31 09:51:57,566 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 83 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:57,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 67 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:51:57,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 09:51:57,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-01-31 09:51:57,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-01-31 09:51:57,569 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 44 [2022-01-31 09:51:57,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:57,569 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-01-31 09:51:57,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:57,569 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-01-31 09:51:57,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 09:51:57,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:57,570 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:51:57,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-31 09:51:57,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:57,783 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:57,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:57,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2083488479, now seen corresponding path program 6 times [2022-01-31 09:51:57,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:57,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151450863] [2022-01-31 09:51:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:57,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:58,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:51:58,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:58,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151450863] [2022-01-31 09:51:58,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151450863] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:58,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248725224] [2022-01-31 09:51:58,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:51:58,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:58,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:59,010 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 09:51:59,051 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 09:51:59,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-31 09:51:59,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:51:59,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 60 conjunts are in the unsatisfiable core [2022-01-31 09:51:59,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:52:00,011 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:52:00,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:52:00,990 INFO L353 Elim1Store]: treesize reduction 113, result has 45.1 percent of original size [2022-01-31 09:52:00,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 115 [2022-01-31 09:52:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:52:01,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248725224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:52:01,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:52:01,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 27, 26] total 73 [2022-01-31 09:52:01,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025275570] [2022-01-31 09:52:01,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:52:01,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 09:52:01,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:52:01,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 09:52:01,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=4905, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 09:52:01,786 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 73 states, 73 states have (on average 1.5753424657534247) internal successors, (115), 70 states have internal predecessors, (115), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:04,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:52:04,741 INFO L93 Difference]: Finished difference Result 121 states and 134 transitions. [2022-01-31 09:52:04,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 09:52:04,741 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.5753424657534247) internal successors, (115), 70 states have internal predecessors, (115), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 09:52:04,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:52:04,742 INFO L225 Difference]: With dead ends: 121 [2022-01-31 09:52:04,742 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 09:52:04,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 57 SyntacticMatches, 12 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3963 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=793, Invalid=11197, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 09:52:04,745 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 2181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 09:52:04,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 240 Invalid, 2181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1797 Invalid, 0 Unknown, 192 Unchecked, 0.9s Time] [2022-01-31 09:52:04,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 09:52:04,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 82. [2022-01-31 09:52:04,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.12987012987013) internal successors, (87), 77 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:04,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2022-01-31 09:52:04,751 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 50 [2022-01-31 09:52:04,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:52:04,753 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2022-01-31 09:52:04,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.5753424657534247) internal successors, (115), 70 states have internal predecessors, (115), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:04,753 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2022-01-31 09:52:04,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 09:52:04,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:52:04,754 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:52:04,772 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 09:52:04,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:52:04,975 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:52:04,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:52:04,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1689066333, now seen corresponding path program 7 times [2022-01-31 09:52:04,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:52:04,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196063904] [2022-01-31 09:52:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:52:04,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:52:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:05,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:52:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 09:52:05,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:52:05,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196063904] [2022-01-31 09:52:05,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196063904] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:52:05,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652721731] [2022-01-31 09:52:05,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:52:05,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:52:05,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:52:05,072 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 09:52:05,073 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 09:52:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:05,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 09:52:05,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:52:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 09:52:05,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:52:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 09:52:05,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652721731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:52:05,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:52:05,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 09:52:05,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090369741] [2022-01-31 09:52:05,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:52:05,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 09:52:05,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:52:05,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 09:52:05,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-01-31 09:52:05,336 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:05,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:52:05,501 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2022-01-31 09:52:05,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 09:52:05,501 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 09:52:05,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:52:05,503 INFO L225 Difference]: With dead ends: 107 [2022-01-31 09:52:05,503 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 09:52:05,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-01-31 09:52:05,504 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:52:05,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 64 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:52:05,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 09:52:05,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-01-31 09:52:05,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 69 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:05,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2022-01-31 09:52:05,507 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 52 [2022-01-31 09:52:05,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:52:05,507 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2022-01-31 09:52:05,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:05,507 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2022-01-31 09:52:05,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 09:52:05,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:52:05,508 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:52:05,525 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 09:52:05,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:52:05,716 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:52:05,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:52:05,716 INFO L85 PathProgramCache]: Analyzing trace with hash 49042362, now seen corresponding path program 8 times [2022-01-31 09:52:05,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:52:05,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945628529] [2022-01-31 09:52:05,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:52:05,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:52:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:05,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:52:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 09:52:05,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:52:05,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945628529] [2022-01-31 09:52:05,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945628529] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:52:05,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024176107] [2022-01-31 09:52:05,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:52:05,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:52:05,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:52:05,828 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 09:52:05,829 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 09:52:05,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:52:05,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:52:05,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 09:52:05,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:52:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 09:52:06,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:52:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 09:52:06,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024176107] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:52:06,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:52:06,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 09:52:06,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830833410] [2022-01-31 09:52:06,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:52:06,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 09:52:06,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:52:06,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 09:52:06,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-01-31 09:52:06,104 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:06,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:52:06,266 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2022-01-31 09:52:06,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 09:52:06,267 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 09:52:06,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:52:06,267 INFO L225 Difference]: With dead ends: 65 [2022-01-31 09:52:06,267 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 09:52:06,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-01-31 09:52:06,268 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 137 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:52:06,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 51 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:52:06,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 09:52:06,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2022-01-31 09:52:06,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 56 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:06,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2022-01-31 09:52:06,271 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 54 [2022-01-31 09:52:06,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:52:06,271 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2022-01-31 09:52:06,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:06,271 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2022-01-31 09:52:06,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 09:52:06,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:52:06,272 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:52:06,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-31 09:52:06,472 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,SelfDestructingSolverStorable10 [2022-01-31 09:52:06,473 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:52:06,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:52:06,473 INFO L85 PathProgramCache]: Analyzing trace with hash 513708596, now seen corresponding path program 9 times [2022-01-31 09:52:06,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:52:06,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336568767] [2022-01-31 09:52:06,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:52:06,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:52:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:08,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:52:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:52:08,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:52:08,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336568767] [2022-01-31 09:52:08,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336568767] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:52:08,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968233103] [2022-01-31 09:52:08,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:52:08,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:52:08,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:52:08,129 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 09:52:08,130 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 09:52:08,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 09:52:08,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:52:08,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 82 conjunts are in the unsatisfiable core [2022-01-31 09:52:08,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:52:08,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 11 [2022-01-31 09:52:12,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:52:12,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:52:12,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:52:12,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:52:12,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 73 treesize of output 59 [2022-01-31 09:52:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:52:12,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:52:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:52:16,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968233103] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:52:16,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:52:16,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 27, 24] total 87 [2022-01-31 09:52:16,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805194099] [2022-01-31 09:52:16,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:52:16,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 09:52:16,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:52:16,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 09:52:16,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=6998, Unknown=1, NotChecked=0, Total=7482 [2022-01-31 09:52:16,467 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 87 states, 87 states have (on average 1.7011494252873562) internal successors, (148), 84 states have internal predecessors, (148), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:20,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:52:20,139 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2022-01-31 09:52:20,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 09:52:20,139 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.7011494252873562) internal successors, (148), 84 states have internal predecessors, (148), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 09:52:20,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:52:20,140 INFO L225 Difference]: With dead ends: 98 [2022-01-31 09:52:20,140 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 09:52:20,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 69 SyntacticMatches, 15 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4571 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1112, Invalid=16179, Unknown=1, NotChecked=0, Total=17292 [2022-01-31 09:52:20,144 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 727 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 09:52:20,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 281 Invalid, 1854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1052 Invalid, 0 Unknown, 727 Unchecked, 0.4s Time] [2022-01-31 09:52:20,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 09:52:20,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2022-01-31 09:52:20,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 81 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-01-31 09:52:20,149 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 60 [2022-01-31 09:52:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:52:20,149 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-01-31 09:52:20,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.7011494252873562) internal successors, (148), 84 states have internal predecessors, (148), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-01-31 09:52:20,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 09:52:20,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:52:20,149 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:52:20,169 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 09:52:20,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:52:20,363 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:52:20,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:52:20,364 INFO L85 PathProgramCache]: Analyzing trace with hash 664119666, now seen corresponding path program 10 times [2022-01-31 09:52:20,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:52:20,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829058571] [2022-01-31 09:52:20,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:52:20,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:52:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:20,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:52:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-31 09:52:20,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:52:20,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829058571] [2022-01-31 09:52:20,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829058571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:52:20,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896473039] [2022-01-31 09:52:20,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:52:20,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:52:20,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:52:20,475 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 09:52:20,506 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 09:52:20,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:52:20,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:52:20,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 09:52:20,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:52:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-31 09:52:20,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:52:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-31 09:52:20,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896473039] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:52:20,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:52:20,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-01-31 09:52:20,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658497454] [2022-01-31 09:52:20,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:52:20,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 09:52:20,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:52:20,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 09:52:20,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-01-31 09:52:20,814 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:21,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:52:21,010 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2022-01-31 09:52:21,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 09:52:21,010 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 09:52:21,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:52:21,011 INFO L225 Difference]: With dead ends: 129 [2022-01-31 09:52:21,011 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 09:52:21,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-01-31 09:52:21,011 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:52:21,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 71 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:52:21,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 09:52:21,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-01-31 09:52:21,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 83 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2022-01-31 09:52:21,017 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 62 [2022-01-31 09:52:21,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:52:21,017 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2022-01-31 09:52:21,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:21,017 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2022-01-31 09:52:21,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 09:52:21,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:52:21,018 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:52:21,039 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 09:52:21,218 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,SelfDestructingSolverStorable12 [2022-01-31 09:52:21,219 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:52:21,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:52:21,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1631834511, now seen corresponding path program 11 times [2022-01-31 09:52:21,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:52:21,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169043164] [2022-01-31 09:52:21,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:52:21,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:52:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:21,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:52:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-31 09:52:21,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:52:21,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169043164] [2022-01-31 09:52:21,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169043164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:52:21,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746635292] [2022-01-31 09:52:21,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:52:21,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:52:21,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:52:21,348 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 09:52:21,349 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 09:52:21,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-31 09:52:21,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:52:21,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 09:52:21,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:52:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-31 09:52:21,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:52:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-31 09:52:21,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746635292] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:52:21,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:52:21,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-31 09:52:21,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343470355] [2022-01-31 09:52:21,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:52:21,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 09:52:21,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:52:21,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 09:52:21,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-01-31 09:52:21,769 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 29 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:22,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:52:22,090 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2022-01-31 09:52:22,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 09:52:22,091 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 29 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 09:52:22,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:52:22,091 INFO L225 Difference]: With dead ends: 75 [2022-01-31 09:52:22,091 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 09:52:22,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 09:52:22,092 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 152 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:52:22,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 69 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:52:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 09:52:22,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2022-01-31 09:52:22,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 66 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:22,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-01-31 09:52:22,095 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 64 [2022-01-31 09:52:22,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:52:22,095 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-01-31 09:52:22,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 29 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:22,095 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-01-31 09:52:22,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 09:52:22,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:52:22,096 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:52:22,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-31 09:52:22,301 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,SelfDestructingSolverStorable13 [2022-01-31 09:52:22,302 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:52:22,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:52:22,302 INFO L85 PathProgramCache]: Analyzing trace with hash -872870839, now seen corresponding path program 12 times [2022-01-31 09:52:22,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:52:22,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646615371] [2022-01-31 09:52:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:52:22,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:52:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:24,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:52:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:52:24,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:52:24,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646615371] [2022-01-31 09:52:24,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646615371] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:52:24,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502842584] [2022-01-31 09:52:24,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:52:24,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:52:24,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:52:24,642 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 09:52:24,643 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 09:52:24,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-31 09:52:24,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:52:24,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 104 conjunts are in the unsatisfiable core [2022-01-31 09:52:24,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:52:24,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 11 [2022-01-31 09:52:26,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:52:26,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2022-01-31 09:52:27,000 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 09:52:27,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:52:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 09:52:32,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502842584] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:52:32,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:52:32,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 34, 28] total 99 [2022-01-31 09:52:32,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40262890] [2022-01-31 09:52:32,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:52:32,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 09:52:32,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:52:32,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 09:52:32,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=9079, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 09:52:32,479 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 99 states, 99 states have (on average 1.7171717171717171) internal successors, (170), 96 states have internal predecessors, (170), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:36,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:52:36,554 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2022-01-31 09:52:36,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 09:52:36,555 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.7171717171717171) internal successors, (170), 96 states have internal predecessors, (170), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 09:52:36,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:52:36,555 INFO L225 Difference]: With dead ends: 112 [2022-01-31 09:52:36,556 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 09:52:36,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 81 SyntacticMatches, 20 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6595 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1343, Invalid=21307, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 09:52:36,561 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 2120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 952 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:52:36,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 290 Invalid, 2120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1070 Invalid, 0 Unknown, 952 Unchecked, 0.5s Time] [2022-01-31 09:52:36,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 09:52:36,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2022-01-31 09:52:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 95 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:36,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2022-01-31 09:52:36,565 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 70 [2022-01-31 09:52:36,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:52:36,565 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2022-01-31 09:52:36,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.7171717171717171) internal successors, (170), 96 states have internal predecessors, (170), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:36,565 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2022-01-31 09:52:36,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 09:52:36,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:52:36,568 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:52:36,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-31 09:52:36,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 09:52:36,783 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:52:36,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:52:36,784 INFO L85 PathProgramCache]: Analyzing trace with hash -398855609, now seen corresponding path program 13 times [2022-01-31 09:52:36,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:52:36,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161687862] [2022-01-31 09:52:36,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:52:36,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:52:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:36,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:52:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-31 09:52:36,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:52:36,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161687862] [2022-01-31 09:52:36,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161687862] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:52:36,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712430375] [2022-01-31 09:52:36,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:52:36,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:52:36,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:52:36,887 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:52:36,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 09:52:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:36,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 09:52:36,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:52:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-31 09:52:37,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:52:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-31 09:52:37,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712430375] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:52:37,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:52:37,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-01-31 09:52:37,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519928563] [2022-01-31 09:52:37,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:52:37,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 09:52:37,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:52:37,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 09:52:37,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-01-31 09:52:37,160 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:37,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:52:37,309 INFO L93 Difference]: Finished difference Result 151 states and 158 transitions. [2022-01-31 09:52:37,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 09:52:37,310 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 09:52:37,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:52:37,310 INFO L225 Difference]: With dead ends: 151 [2022-01-31 09:52:37,310 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 09:52:37,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2022-01-31 09:52:37,311 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 70 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:52:37,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 76 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:52:37,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 09:52:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2022-01-31 09:52:37,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 97 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:37,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2022-01-31 09:52:37,326 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 72 [2022-01-31 09:52:37,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:52:37,326 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2022-01-31 09:52:37,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:37,326 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2022-01-31 09:52:37,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 09:52:37,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:52:37,327 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:52:37,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 09:52:37,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 09:52:37,544 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:52:37,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:52:37,544 INFO L85 PathProgramCache]: Analyzing trace with hash -96576988, now seen corresponding path program 14 times [2022-01-31 09:52:37,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:52:37,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628295271] [2022-01-31 09:52:37,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:52:37,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:52:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:37,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:52:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-01-31 09:52:37,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:52:37,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628295271] [2022-01-31 09:52:37,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628295271] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:52:37,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390878292] [2022-01-31 09:52:37,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:52:37,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:52:37,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:52:37,657 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:52:37,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 09:52:37,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:52:37,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:52:37,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 09:52:37,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:52:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-01-31 09:52:37,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:52:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-01-31 09:52:38,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390878292] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:52:38,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:52:38,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-01-31 09:52:38,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661374579] [2022-01-31 09:52:38,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:52:38,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 09:52:38,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:52:38,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 09:52:38,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2022-01-31 09:52:38,005 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:38,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:52:38,238 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2022-01-31 09:52:38,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 09:52:38,239 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 09:52:38,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:52:38,239 INFO L225 Difference]: With dead ends: 85 [2022-01-31 09:52:38,239 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 09:52:38,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=777, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 09:52:38,240 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 257 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:52:38,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 45 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:52:38,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 09:52:38,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2022-01-31 09:52:38,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 76 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:38,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-01-31 09:52:38,242 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 74 [2022-01-31 09:52:38,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:52:38,242 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-01-31 09:52:38,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:38,242 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-01-31 09:52:38,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 09:52:38,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:52:38,243 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:52:38,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 09:52:38,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:52:38,451 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:52:38,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:52:38,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1308328222, now seen corresponding path program 15 times [2022-01-31 09:52:38,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:52:38,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370954164] [2022-01-31 09:52:38,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:52:38,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:52:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:40,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:52:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 4 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:52:40,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:52:40,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370954164] [2022-01-31 09:52:40,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370954164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:52:40,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596711465] [2022-01-31 09:52:40,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:52:40,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:52:40,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:52:40,974 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:52:40,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 09:52:41,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-31 09:52:41,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:52:41,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 122 conjunts are in the unsatisfiable core [2022-01-31 09:52:41,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:52:41,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 11 [2022-01-31 09:52:45,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:52:45,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:52:45,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:52:45,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:52:45,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:52:45,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:52:45,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:52:45,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:52:45,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:52:45,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:52:45,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 109 [2022-01-31 09:52:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 7 proven. 164 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:52:45,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:52:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 09:52:53,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596711465] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:52:53,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:52:53,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 37, 32] total 119 [2022-01-31 09:52:53,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464125164] [2022-01-31 09:52:53,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:52:53,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 09:52:53,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:52:53,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 09:52:53,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=896, Invalid=13146, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 09:52:53,457 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 119 states, 119 states have (on average 1.6638655462184875) internal successors, (198), 116 states have internal predecessors, (198), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:53:01,354 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2022-01-31 09:53:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 09:53:01,354 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.6638655462184875) internal successors, (198), 116 states have internal predecessors, (198), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 09:53:01,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:53:01,355 INFO L225 Difference]: With dead ends: 128 [2022-01-31 09:53:01,355 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 09:53:01,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 96 SyntacticMatches, 15 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9285 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=2003, Invalid=31303, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 09:53:01,357 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 1809 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 3214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1284 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 09:53:01,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 363 Invalid, 3214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1809 Invalid, 0 Unknown, 1284 Unchecked, 0.8s Time] [2022-01-31 09:53:01,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 09:53:01,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 114. [2022-01-31 09:53:01,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.073394495412844) internal successors, (117), 109 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:01,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2022-01-31 09:53:01,359 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 80 [2022-01-31 09:53:01,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:53:01,359 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2022-01-31 09:53:01,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.6638655462184875) internal successors, (198), 116 states have internal predecessors, (198), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:01,360 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2022-01-31 09:53:01,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 09:53:01,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:53:01,360 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:53:01,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 09:53:01,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 09:53:01,561 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:53:01,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:53:01,561 INFO L85 PathProgramCache]: Analyzing trace with hash -210598436, now seen corresponding path program 16 times [2022-01-31 09:53:01,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:53:01,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150979055] [2022-01-31 09:53:01,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:53:01,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:53:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:53:01,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:53:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:53:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-01-31 09:53:01,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:53:01,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150979055] [2022-01-31 09:53:01,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150979055] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:53:01,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541837348] [2022-01-31 09:53:01,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:53:01,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:53:01,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:53:01,712 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:53:01,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 09:53:01,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:53:01,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:53:01,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 09:53:01,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:53:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-01-31 09:53:02,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:53:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-01-31 09:53:02,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541837348] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:53:02,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:53:02,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2022-01-31 09:53:02,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224938480] [2022-01-31 09:53:02,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:53:02,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 09:53:02,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:53:02,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 09:53:02,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-01-31 09:53:02,158 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:02,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:53:02,488 INFO L93 Difference]: Finished difference Result 173 states and 180 transitions. [2022-01-31 09:53:02,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 09:53:02,488 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 09:53:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:53:02,488 INFO L225 Difference]: With dead ends: 173 [2022-01-31 09:53:02,489 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 09:53:02,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 09:53:02,489 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:53:02,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 114 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:53:02,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 09:53:02,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2022-01-31 09:53:02,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.072072072072072) internal successors, (119), 111 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:02,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2022-01-31 09:53:02,500 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 82 [2022-01-31 09:53:02,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:53:02,500 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2022-01-31 09:53:02,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:02,500 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2022-01-31 09:53:02,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 09:53:02,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:53:02,501 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:53:02,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 09:53:02,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:53:02,707 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:53:02,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:53:02,708 INFO L85 PathProgramCache]: Analyzing trace with hash -573538951, now seen corresponding path program 17 times [2022-01-31 09:53:02,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:53:02,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266752942] [2022-01-31 09:53:02,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:53:02,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:53:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:53:02,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:53:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:53:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-01-31 09:53:02,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:53:02,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266752942] [2022-01-31 09:53:02,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266752942] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:53:02,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691657777] [2022-01-31 09:53:02,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:53:02,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:53:02,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:53:02,848 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:53:02,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 09:53:03,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-31 09:53:03,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:53:03,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 09:53:03,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:53:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-01-31 09:53:03,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:53:03,393 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-01-31 09:53:03,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691657777] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:53:03,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:53:03,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2022-01-31 09:53:03,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694386430] [2022-01-31 09:53:03,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:53:03,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 09:53:03,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:53:03,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 09:53:03,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2022-01-31 09:53:03,394 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:03,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:53:03,647 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2022-01-31 09:53:03,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 09:53:03,647 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-01-31 09:53:03,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:53:03,648 INFO L225 Difference]: With dead ends: 95 [2022-01-31 09:53:03,648 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 09:53:03,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=979, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 09:53:03,649 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 225 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:53:03,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 49 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:53:03,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 09:53:03,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2022-01-31 09:53:03,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.058139534883721) internal successors, (91), 86 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:03,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2022-01-31 09:53:03,651 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 84 [2022-01-31 09:53:03,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:53:03,651 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2022-01-31 09:53:03,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:03,651 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2022-01-31 09:53:03,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 09:53:03,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:53:03,652 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:53:03,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 09:53:03,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:53:03,855 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:53:03,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:53:03,855 INFO L85 PathProgramCache]: Analyzing trace with hash -336691021, now seen corresponding path program 18 times [2022-01-31 09:53:03,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:53:03,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279801596] [2022-01-31 09:53:03,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:53:03,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:53:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:53:07,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:53:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:53:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 9 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:53:07,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:53:07,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279801596] [2022-01-31 09:53:07,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279801596] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:53:07,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309226987] [2022-01-31 09:53:07,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:53:07,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:53:07,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:53:07,653 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:53:07,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 09:53:07,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-31 09:53:07,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:53:07,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 134 conjunts are in the unsatisfiable core [2022-01-31 09:53:07,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:53:12,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:12,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:53:12,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 181 treesize of output 257 [2022-01-31 09:53:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 13 proven. 196 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:53:13,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:53:22,725 INFO L353 Elim1Store]: treesize reduction 1183, result has 20.9 percent of original size [2022-01-31 09:53:22,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 268 treesize of output 351 [2022-01-31 09:53:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:53:45,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309226987] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:53:45,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:53:45,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 39, 37] total 138 [2022-01-31 09:53:45,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955696513] [2022-01-31 09:53:45,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:53:45,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 09:53:45,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:53:45,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 09:53:45,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=17717, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 09:53:45,488 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 138 states, 138 states have (on average 1.6376811594202898) internal successors, (226), 135 states have internal predecessors, (226), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:56,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:53:56,626 INFO L93 Difference]: Finished difference Result 145 states and 152 transitions. [2022-01-31 09:53:56,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 09:53:56,627 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.6376811594202898) internal successors, (226), 135 states have internal predecessors, (226), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-01-31 09:53:56,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:53:56,627 INFO L225 Difference]: With dead ends: 145 [2022-01-31 09:53:56,627 INFO L226 Difference]: Without dead ends: 142 [2022-01-31 09:53:56,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 110 SyntacticMatches, 12 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11889 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=2646, Invalid=41664, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 09:53:56,630 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 3470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1393 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 09:53:56,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 336 Invalid, 3470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1932 Invalid, 0 Unknown, 1393 Unchecked, 0.9s Time] [2022-01-31 09:53:56,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-31 09:53:56,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 128. [2022-01-31 09:53:56,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.065040650406504) internal successors, (131), 123 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:56,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 135 transitions. [2022-01-31 09:53:56,634 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 135 transitions. Word has length 90 [2022-01-31 09:53:56,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:53:56,634 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 135 transitions. [2022-01-31 09:53:56,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.6376811594202898) internal successors, (226), 135 states have internal predecessors, (226), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:56,635 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 135 transitions. [2022-01-31 09:53:56,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 09:53:56,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:53:56,635 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:53:56,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-31 09:53:56,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:53:56,853 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:53:56,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:53:56,854 INFO L85 PathProgramCache]: Analyzing trace with hash -526126031, now seen corresponding path program 19 times [2022-01-31 09:53:56,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:53:56,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177143050] [2022-01-31 09:53:56,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:53:56,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:53:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:53:56,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:53:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:53:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-01-31 09:53:56,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:53:56,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177143050] [2022-01-31 09:53:56,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177143050] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:53:56,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963267508] [2022-01-31 09:53:56,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:53:56,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:53:56,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:53:57,016 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:53:57,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 09:53:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:53:57,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 09:53:57,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:53:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-01-31 09:53:57,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:53:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-01-31 09:53:57,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963267508] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:53:57,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:53:57,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-01-31 09:53:57,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550569591] [2022-01-31 09:53:57,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:53:57,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 09:53:57,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:53:57,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 09:53:57,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2022-01-31 09:53:57,614 INFO L87 Difference]: Start difference. First operand 128 states and 135 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:57,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:53:57,942 INFO L93 Difference]: Finished difference Result 195 states and 202 transitions. [2022-01-31 09:53:57,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 09:53:57,944 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-01-31 09:53:57,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:53:57,945 INFO L225 Difference]: With dead ends: 195 [2022-01-31 09:53:57,945 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 09:53:57,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=338, Invalid=1222, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 09:53:57,945 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 78 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:53:57,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 74 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:53:57,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 09:53:57,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-01-31 09:53:57,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.064) internal successors, (133), 125 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:57,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 137 transitions. [2022-01-31 09:53:57,948 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 137 transitions. Word has length 92 [2022-01-31 09:53:57,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:53:57,948 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 137 transitions. [2022-01-31 09:53:57,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:57,948 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 137 transitions. [2022-01-31 09:53:57,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 09:53:57,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:53:57,948 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:53:57,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-31 09:53:58,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:53:58,149 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:53:58,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:53:58,149 INFO L85 PathProgramCache]: Analyzing trace with hash 863685518, now seen corresponding path program 20 times [2022-01-31 09:53:58,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:53:58,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553869510] [2022-01-31 09:53:58,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:53:58,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:53:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:53:58,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:53:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:53:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-01-31 09:53:58,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:53:58,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553869510] [2022-01-31 09:53:58,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553869510] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:53:58,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647839130] [2022-01-31 09:53:58,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:53:58,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:53:58,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:53:58,296 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:53:58,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 09:53:58,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:53:58,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:53:58,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 09:53:58,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:53:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-01-31 09:53:58,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:53:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-01-31 09:53:58,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647839130] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:53:58,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:53:58,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-01-31 09:53:58,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315921477] [2022-01-31 09:53:58,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:53:58,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 09:53:58,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:53:58,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 09:53:58,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-01-31 09:53:58,768 INFO L87 Difference]: Start difference. First operand 130 states and 137 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:59,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:53:59,069 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2022-01-31 09:53:59,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 09:53:59,070 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-01-31 09:53:59,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:53:59,070 INFO L225 Difference]: With dead ends: 105 [2022-01-31 09:53:59,070 INFO L226 Difference]: Without dead ends: 105 [2022-01-31 09:53:59,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=436, Invalid=1204, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 09:53:59,071 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 195 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:53:59,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 53 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:53:59,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-31 09:53:59,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2022-01-31 09:53:59,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 96 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:59,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-01-31 09:53:59,079 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 94 [2022-01-31 09:53:59,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:53:59,079 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-01-31 09:53:59,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:59,079 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-01-31 09:53:59,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 09:53:59,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:53:59,080 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:53:59,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-31 09:53:59,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-31 09:53:59,296 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:53:59,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:53:59,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1415144696, now seen corresponding path program 21 times [2022-01-31 09:53:59,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:53:59,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166223742] [2022-01-31 09:53:59,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:53:59,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:53:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:54:04,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:54:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:54:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 1 proven. 319 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:54:04,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:54:04,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166223742] [2022-01-31 09:54:04,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166223742] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:54:04,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510685020] [2022-01-31 09:54:04,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:54:04,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:54:04,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:54:04,516 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:54:04,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 09:54:04,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-31 09:54:04,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:54:04,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 156 conjunts are in the unsatisfiable core [2022-01-31 09:54:04,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:54:15,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 09:54:15,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 09:54:15,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:54:15,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 09:54:16,052 INFO L353 Elim1Store]: treesize reduction 348, result has 56.1 percent of original size [2022-01-31 09:54:16,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 225 treesize of output 480 [2022-01-31 09:54:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 9 proven. 295 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 09:54:23,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:54:37,873 INFO L353 Elim1Store]: treesize reduction 1329, result has 30.3 percent of original size [2022-01-31 09:54:37,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 296 treesize of output 619 [2022-01-31 09:55:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 09:55:10,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510685020] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:55:10,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:55:10,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 46, 41] total 152 [2022-01-31 09:55:10,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203694365] [2022-01-31 09:55:10,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:55:10,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-01-31 09:55:10,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:55:10,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-01-31 09:55:10,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1446, Invalid=21505, Unknown=1, NotChecked=0, Total=22952 [2022-01-31 09:55:10,201 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 152 states, 152 states have (on average 1.631578947368421) internal successors, (248), 149 states have internal predecessors, (248), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:55:27,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:55:27,183 INFO L93 Difference]: Finished difference Result 161 states and 168 transitions. [2022-01-31 09:55:27,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 09:55:27,184 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 1.631578947368421) internal successors, (248), 149 states have internal predecessors, (248), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-01-31 09:55:27,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:55:27,184 INFO L225 Difference]: With dead ends: 161 [2022-01-31 09:55:27,184 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 09:55:27,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 117 SyntacticMatches, 22 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14758 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=3102, Invalid=50953, Unknown=1, NotChecked=0, Total=54056 [2022-01-31 09:55:27,193 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 2222 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 4632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2274 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:55:27,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 394 Invalid, 4632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2222 Invalid, 0 Unknown, 2274 Unchecked, 1.1s Time] [2022-01-31 09:55:27,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 09:55:27,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 142. [2022-01-31 09:55:27,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0583941605839415) internal successors, (145), 137 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:55:27,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2022-01-31 09:55:27,207 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 100 [2022-01-31 09:55:27,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:55:27,207 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2022-01-31 09:55:27,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 1.631578947368421) internal successors, (248), 149 states have internal predecessors, (248), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:55:27,208 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2022-01-31 09:55:27,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 09:55:27,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:55:27,209 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:55:27,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 09:55:27,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-31 09:55:27,423 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:55:27,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:55:27,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1832989370, now seen corresponding path program 22 times [2022-01-31 09:55:27,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:55:27,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916463894] [2022-01-31 09:55:27,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:55:27,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:55:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:27,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:55:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-01-31 09:55:27,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:55:27,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916463894] [2022-01-31 09:55:27,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916463894] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:55:27,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878366807] [2022-01-31 09:55:27,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:55:27,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:55:27,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:55:27,658 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:55:27,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 09:55:27,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:55:27,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:55:27,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 09:55:27,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:55:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-01-31 09:55:28,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:55:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-01-31 09:55:28,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878366807] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:55:28,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:55:28,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 33 [2022-01-31 09:55:28,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70417918] [2022-01-31 09:55:28,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:55:28,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 09:55:28,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:55:28,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 09:55:28,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 09:55:28,255 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:55:28,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:55:28,696 INFO L93 Difference]: Finished difference Result 217 states and 224 transitions. [2022-01-31 09:55:28,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 09:55:28,696 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 09:55:28,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:55:28,697 INFO L225 Difference]: With dead ends: 217 [2022-01-31 09:55:28,697 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 09:55:28,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=409, Invalid=1483, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 09:55:28,698 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 79 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:55:28,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 92 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:55:28,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 09:55:28,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2022-01-31 09:55:28,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0575539568345325) internal successors, (147), 139 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:55:28,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 151 transitions. [2022-01-31 09:55:28,700 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 151 transitions. Word has length 102 [2022-01-31 09:55:28,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:55:28,700 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 151 transitions. [2022-01-31 09:55:28,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:55:28,700 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 151 transitions. [2022-01-31 09:55:28,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 09:55:28,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:55:28,701 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:55:28,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-31 09:55:28,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:55:28,914 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:55:28,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:55:28,914 INFO L85 PathProgramCache]: Analyzing trace with hash -79047581, now seen corresponding path program 23 times [2022-01-31 09:55:28,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:55:28,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594874654] [2022-01-31 09:55:28,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:55:28,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:55:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:29,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:55:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-01-31 09:55:29,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:55:29,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594874654] [2022-01-31 09:55:29,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594874654] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:55:29,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702551147] [2022-01-31 09:55:29,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:55:29,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:55:29,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:55:29,136 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:55:29,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-31 09:55:29,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-31 09:55:29,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:55:29,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 09:55:29,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:55:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-01-31 09:55:29,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:55:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-01-31 09:55:30,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702551147] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:55:30,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:55:30,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 50 [2022-01-31 09:55:30,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79505659] [2022-01-31 09:55:30,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:55:30,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 09:55:30,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:55:30,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 09:55:30,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2117, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 09:55:30,052 INFO L87 Difference]: Start difference. First operand 144 states and 151 transitions. Second operand has 50 states, 50 states have (on average 2.46) internal successors, (123), 49 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:55:30,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:55:30,464 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2022-01-31 09:55:30,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 09:55:30,464 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.46) internal successors, (123), 49 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-01-31 09:55:30,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:55:30,465 INFO L225 Difference]: With dead ends: 115 [2022-01-31 09:55:30,465 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 09:55:30,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=629, Invalid=3403, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 09:55:30,466 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 279 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:55:30,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 95 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:55:30,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 09:55:30,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2022-01-31 09:55:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0471698113207548) internal successors, (111), 106 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:55:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2022-01-31 09:55:30,469 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 104 [2022-01-31 09:55:30,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:55:30,469 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2022-01-31 09:55:30,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.46) internal successors, (123), 49 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:55:30,470 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2022-01-31 09:55:30,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 09:55:30,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:55:30,470 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:55:30,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-31 09:55:30,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:55:30,688 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:55:30,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:55:30,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1384407069, now seen corresponding path program 24 times [2022-01-31 09:55:30,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:55:30,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544214350] [2022-01-31 09:55:30,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:55:30,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:55:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:37,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:55:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:55:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 4 proven. 401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:55:37,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:55:37,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544214350] [2022-01-31 09:55:37,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544214350] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:55:37,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054411895] [2022-01-31 09:55:37,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:55:37,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:55:37,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:55:37,418 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:55:37,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-31 09:55:37,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-31 09:55:37,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:55:37,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 176 conjunts are in the unsatisfiable core [2022-01-31 09:55:37,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:55:37,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 11 [2022-01-31 09:55:44,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:55:44,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:55:44,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:55:44,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:55:44,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 73 treesize of output 59 [2022-01-31 09:55:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 5 proven. 396 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:55:45,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:56:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 09:56:05,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054411895] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:56:05,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:56:05,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 53, 44] total 161 [2022-01-31 09:56:05,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681742227] [2022-01-31 09:56:05,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:56:05,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-01-31 09:56:05,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:56:05,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-01-31 09:56:05,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1012, Invalid=24748, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 09:56:05,069 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 161 states, 161 states have (on average 1.6645962732919255) internal successors, (268), 158 states have internal predecessors, (268), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:56:27,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:56:27,128 INFO L93 Difference]: Finished difference Result 177 states and 184 transitions. [2022-01-31 09:56:27,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 09:56:27,129 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 1.6645962732919255) internal successors, (268), 158 states have internal predecessors, (268), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-01-31 09:56:27,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:56:27,129 INFO L225 Difference]: With dead ends: 177 [2022-01-31 09:56:27,129 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 09:56:27,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 128 SyntacticMatches, 30 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14523 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=2732, Invalid=60016, Unknown=2, NotChecked=0, Total=62750 [2022-01-31 09:56:27,132 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 2870 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 5922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2887 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:56:27,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 438 Invalid, 5922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2870 Invalid, 0 Unknown, 2887 Unchecked, 1.5s Time] [2022-01-31 09:56:27,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 09:56:27,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 156. [2022-01-31 09:56:27,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0529801324503312) internal successors, (159), 151 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:56:27,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 163 transitions. [2022-01-31 09:56:27,135 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 163 transitions. Word has length 110 [2022-01-31 09:56:27,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:56:27,135 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 163 transitions. [2022-01-31 09:56:27,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 1.6645962732919255) internal successors, (268), 158 states have internal predecessors, (268), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:56:27,135 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 163 transitions. [2022-01-31 09:56:27,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-31 09:56:27,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:56:27,135 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:56:27,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-31 09:56:27,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-31 09:56:27,336 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:56:27,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:56:27,336 INFO L85 PathProgramCache]: Analyzing trace with hash -113270501, now seen corresponding path program 25 times [2022-01-31 09:56:27,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:56:27,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687434332] [2022-01-31 09:56:27,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:56:27,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:56:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:27,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:56:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-01-31 09:56:27,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:56:27,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687434332] [2022-01-31 09:56:27,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687434332] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:56:27,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677805235] [2022-01-31 09:56:27,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:56:27,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:56:27,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:56:27,591 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:56:27,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-31 09:56:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:27,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 09:56:27,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:56:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-01-31 09:56:28,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:56:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-01-31 09:56:28,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677805235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:56:28,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:56:28,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 36 [2022-01-31 09:56:28,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651989682] [2022-01-31 09:56:28,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:56:28,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 09:56:28,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:56:28,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 09:56:28,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 09:56:28,270 INFO L87 Difference]: Start difference. First operand 156 states and 163 transitions. Second operand has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:56:28,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:56:28,726 INFO L93 Difference]: Finished difference Result 239 states and 246 transitions. [2022-01-31 09:56:28,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 09:56:28,727 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2022-01-31 09:56:28,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:56:28,727 INFO L225 Difference]: With dead ends: 239 [2022-01-31 09:56:28,727 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 09:56:28,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=487, Invalid=1769, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 09:56:28,728 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 92 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:56:28,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 91 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:56:28,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 09:56:28,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2022-01-31 09:56:28,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0522875816993464) internal successors, (161), 153 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:56:28,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 165 transitions. [2022-01-31 09:56:28,731 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 165 transitions. Word has length 112 [2022-01-31 09:56:28,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:56:28,731 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 165 transitions. [2022-01-31 09:56:28,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:56:28,731 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 165 transitions. [2022-01-31 09:56:28,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 09:56:28,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:56:28,731 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:56:28,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-31 09:56:28,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-31 09:56:28,947 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:56:28,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:56:28,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1898567688, now seen corresponding path program 26 times [2022-01-31 09:56:28,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:56:28,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160109970] [2022-01-31 09:56:28,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:56:28,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:56:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:29,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:56:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-01-31 09:56:29,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:56:29,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160109970] [2022-01-31 09:56:29,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160109970] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:56:29,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761483466] [2022-01-31 09:56:29,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:56:29,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:56:29,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:56:29,121 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:56:29,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-31 09:56:29,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:56:29,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:56:29,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 09:56:29,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:56:29,466 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-01-31 09:56:29,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:56:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-01-31 09:56:29,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761483466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:56:29,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:56:29,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 36 [2022-01-31 09:56:29,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391778620] [2022-01-31 09:56:29,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:56:29,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 09:56:29,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:56:29,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 09:56:29,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=969, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 09:56:29,625 INFO L87 Difference]: Start difference. First operand 158 states and 165 transitions. Second operand has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:56:30,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:56:30,015 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2022-01-31 09:56:30,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 09:56:30,015 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-01-31 09:56:30,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:56:30,016 INFO L225 Difference]: With dead ends: 125 [2022-01-31 09:56:30,016 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 09:56:30,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 09:56:30,017 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 349 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:56:30,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 53 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:56:30,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 09:56:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2022-01-31 09:56:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.043103448275862) internal successors, (121), 116 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:56:30,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2022-01-31 09:56:30,019 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 114 [2022-01-31 09:56:30,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:56:30,020 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2022-01-31 09:56:30,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:56:30,020 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2022-01-31 09:56:30,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 09:56:30,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:56:30,020 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:56:30,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-31 09:56:30,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-31 09:56:30,227 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:56:30,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:56:30,228 INFO L85 PathProgramCache]: Analyzing trace with hash 645160946, now seen corresponding path program 27 times [2022-01-31 09:56:30,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:56:30,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357077150] [2022-01-31 09:56:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:56:30,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:56:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:38,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:56:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 25 proven. 475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:56:38,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:56:38,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357077150] [2022-01-31 09:56:38,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357077150] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:56:38,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018014373] [2022-01-31 09:56:38,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:56:38,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:56:38,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:56:38,023 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:56:38,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-31 09:56:38,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-31 09:56:38,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:56:38,231 WARN L261 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 199 conjunts are in the unsatisfiable core [2022-01-31 09:56:38,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:56:38,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 11 [2022-01-31 09:56:38,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 11 [2022-01-31 09:56:38,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 11 [2022-01-31 09:56:48,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:48,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:56:48,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 98 treesize of output 251 [2022-01-31 09:56:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 20 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:56:49,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:57:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 419 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-31 09:57:12,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018014373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:57:12,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:57:12,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 61, 48] total 200 [2022-01-31 09:57:12,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518542379] [2022-01-31 09:57:12,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:57:12,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-01-31 09:57:12,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:57:12,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-01-31 09:57:12,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3087, Invalid=36713, Unknown=0, NotChecked=0, Total=39800 [2022-01-31 09:57:12,403 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 200 states, 200 states have (on average 1.575) internal successors, (315), 197 states have internal predecessors, (315), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:57:29,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:57:29,183 INFO L93 Difference]: Finished difference Result 193 states and 200 transitions. [2022-01-31 09:57:29,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 09:57:29,183 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 1.575) internal successors, (315), 197 states have internal predecessors, (315), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2022-01-31 09:57:29,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:57:29,184 INFO L225 Difference]: With dead ends: 193 [2022-01-31 09:57:29,184 INFO L226 Difference]: Without dead ends: 190 [2022-01-31 09:57:29,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 130 SyntacticMatches, 25 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23459 ImplicationChecksByTransitivity, 46.3s TimeCoverageRelationStatistics Valid=5390, Invalid=62992, Unknown=0, NotChecked=0, Total=68382 [2022-01-31 09:57:29,187 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 3656 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 6319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 3656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2393 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:57:29,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 469 Invalid, 6319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 3656 Invalid, 0 Unknown, 2393 Unchecked, 2.0s Time] [2022-01-31 09:57:29,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-31 09:57:29,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 170. [2022-01-31 09:57:29,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0484848484848486) internal successors, (173), 165 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:57:29,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 177 transitions. [2022-01-31 09:57:29,209 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 177 transitions. Word has length 120 [2022-01-31 09:57:29,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:57:29,209 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 177 transitions. [2022-01-31 09:57:29,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 1.575) internal successors, (315), 197 states have internal predecessors, (315), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:57:29,209 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 177 transitions. [2022-01-31 09:57:29,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 09:57:29,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:57:29,210 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:57:29,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-31 09:57:29,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:57:29,410 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:57:29,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:57:29,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1859190864, now seen corresponding path program 28 times [2022-01-31 09:57:29,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:57:29,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299176514] [2022-01-31 09:57:29,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:57:29,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:57:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:57:29,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:57:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:57:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 102 proven. 119 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-01-31 09:57:29,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:57:29,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299176514] [2022-01-31 09:57:29,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299176514] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:57:29,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949289004] [2022-01-31 09:57:29,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:57:29,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:57:29,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:57:29,659 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:57:29,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-31 09:57:29,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:57:29,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:57:29,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 09:57:29,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:57:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-01-31 09:57:30,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:57:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-01-31 09:57:30,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949289004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:57:30,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:57:30,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 39 [2022-01-31 09:57:30,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98527661] [2022-01-31 09:57:30,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:57:30,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 09:57:30,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:57:30,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 09:57:30,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1151, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 09:57:30,361 INFO L87 Difference]: Start difference. First operand 170 states and 177 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:57:30,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:57:30,811 INFO L93 Difference]: Finished difference Result 261 states and 268 transitions. [2022-01-31 09:57:30,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 09:57:30,811 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-01-31 09:57:30,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:57:30,812 INFO L225 Difference]: With dead ends: 261 [2022-01-31 09:57:30,812 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 09:57:30,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=572, Invalid=2080, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 09:57:30,813 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 114 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:57:30,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 80 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:57:30,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 09:57:30,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2022-01-31 09:57:30,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0479041916167664) internal successors, (175), 167 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:57:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 179 transitions. [2022-01-31 09:57:30,815 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 179 transitions. Word has length 122 [2022-01-31 09:57:30,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:57:30,815 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 179 transitions. [2022-01-31 09:57:30,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:57:30,815 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 179 transitions. [2022-01-31 09:57:30,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 09:57:30,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:57:30,816 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:57:30,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-31 09:57:31,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:57:31,034 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:57:31,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:57:31,035 INFO L85 PathProgramCache]: Analyzing trace with hash -498837939, now seen corresponding path program 29 times [2022-01-31 09:57:31,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:57:31,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857360661] [2022-01-31 09:57:31,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:57:31,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:57:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:57:31,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:57:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:57:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2022-01-31 09:57:31,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:57:31,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857360661] [2022-01-31 09:57:31,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857360661] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:57:31,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282574937] [2022-01-31 09:57:31,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:57:31,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:57:31,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:57:31,297 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:57:31,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-31 09:57:31,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-01-31 09:57:31,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:57:31,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 09:57:31,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:57:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2022-01-31 09:57:32,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:57:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2022-01-31 09:57:32,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282574937] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:57:32,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:57:32,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 60 [2022-01-31 09:57:32,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728122508] [2022-01-31 09:57:32,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:57:32,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 09:57:32,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:57:32,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 09:57:32,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=3069, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 09:57:32,452 INFO L87 Difference]: Start difference. First operand 172 states and 179 transitions. Second operand has 60 states, 60 states have (on average 2.3833333333333333) internal successors, (143), 59 states have internal predecessors, (143), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:57:33,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:57:33,198 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2022-01-31 09:57:33,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 09:57:33,198 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.3833333333333333) internal successors, (143), 59 states have internal predecessors, (143), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2022-01-31 09:57:33,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:57:33,199 INFO L225 Difference]: With dead ends: 135 [2022-01-31 09:57:33,199 INFO L226 Difference]: Without dead ends: 135 [2022-01-31 09:57:33,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=884, Invalid=4816, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 09:57:33,200 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 480 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 09:57:33,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 85 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 09:57:33,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-31 09:57:33,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-01-31 09:57:33,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0396825396825398) internal successors, (131), 126 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:57:33,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2022-01-31 09:57:33,202 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 124 [2022-01-31 09:57:33,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:57:33,202 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2022-01-31 09:57:33,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.3833333333333333) internal successors, (143), 59 states have internal predecessors, (143), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:57:33,203 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2022-01-31 09:57:33,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 09:57:33,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:57:33,203 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:57:33,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-31 09:57:33,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:57:33,411 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:57:33,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:57:33,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1861167751, now seen corresponding path program 30 times [2022-01-31 09:57:33,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:57:33,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309329612] [2022-01-31 09:57:33,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:57:33,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:57:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:57:43,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:57:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:57:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 0 proven. 605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:57:43,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:57:43,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309329612] [2022-01-31 09:57:43,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309329612] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:57:43,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322809985] [2022-01-31 09:57:43,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:57:43,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:57:43,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:57:43,895 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:57:43,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-31 09:57:44,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-01-31 09:57:44,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:57:44,197 WARN L261 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 210 conjunts are in the unsatisfiable core [2022-01-31 09:57:44,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:58:01,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:58:01,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:58:01,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 84 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 289 treesize of output 599 [2022-01-31 09:58:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 17 proven. 524 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 09:58:09,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:58:35,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-01-31 09:58:35,031 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-01-31 09:58:35,033 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2022-01-31 09:58:35,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-31 09:58:35,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-31 09:58:35,240 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 47 more [2022-01-31 09:58:35,243 INFO L158 Benchmark]: Toolchain (without parser) took 409536.26ms. Allocated memory was 184.5MB in the beginning and 639.6MB in the end (delta: 455.1MB). Free memory was 130.1MB in the beginning and 538.9MB in the end (delta: -408.8MB). Peak memory consumption was 413.5MB. Max. memory is 8.0GB. [2022-01-31 09:58:35,243 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 184.5MB. Free memory is still 146.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 09:58:35,243 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.58ms. Allocated memory was 184.5MB in the beginning and 255.9MB in the end (delta: 71.3MB). Free memory was 129.9MB in the beginning and 228.0MB in the end (delta: -98.1MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-01-31 09:58:35,243 INFO L158 Benchmark]: Boogie Preprocessor took 22.47ms. Allocated memory is still 255.9MB. Free memory was 228.0MB in the beginning and 226.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 09:58:35,244 INFO L158 Benchmark]: RCFGBuilder took 296.44ms. Allocated memory is still 255.9MB. Free memory was 226.4MB in the beginning and 214.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-31 09:58:35,244 INFO L158 Benchmark]: IcfgTransformer took 30.23ms. Allocated memory is still 255.9MB. Free memory was 214.9MB in the beginning and 213.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 09:58:35,244 INFO L158 Benchmark]: TraceAbstraction took 408970.53ms. Allocated memory was 255.9MB in the beginning and 639.6MB in the end (delta: 383.8MB). Free memory was 213.3MB in the beginning and 538.9MB in the end (delta: -325.6MB). Peak memory consumption was 426.0MB. Max. memory is 8.0GB. [2022-01-31 09:58:35,244 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 184.5MB. Free memory is still 146.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 211.58ms. Allocated memory was 184.5MB in the beginning and 255.9MB in the end (delta: 71.3MB). Free memory was 129.9MB in the beginning and 228.0MB in the end (delta: -98.1MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.47ms. Allocated memory is still 255.9MB. Free memory was 228.0MB in the beginning and 226.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 296.44ms. Allocated memory is still 255.9MB. Free memory was 226.4MB in the beginning and 214.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 30.23ms. Allocated memory is still 255.9MB. Free memory was 214.9MB in the beginning and 213.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 408970.53ms. Allocated memory was 255.9MB in the beginning and 639.6MB in the end (delta: 383.8MB). Free memory was 213.3MB in the beginning and 538.9MB in the end (delta: -325.6MB). Peak memory consumption was 426.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...